Okutama: Riding to the Highest Pass in Tokyo

There is a mountain pass at 1,146 metres inside the Tokyo Metropolis. About 50 km west of the Metropolitan Government building, still within the same administrative boundary, sits the highest point on any paved public road in Tokyo. It is called Kazahari Pass.

That is the thing about Okutama. The same prefecture contains the Shibuya scramble crossing and a thousand-metre ridge with bears living on it. Not many capital cities can say that.

It is also a different world from the lower Tama River we covered in a companion piece. That ride is flat, with no traffic lights and no gradient. This one has two toilets in 19.7 km, mobile dead zones, and official road signs stating that an ambulance takes roughly two hours to reach you.

This article is for people who want to go anyway.

Quick Facts (at a Glance)

• The objective: Kazahari Pass, 1,146 m — the highest paved public road in Tokyo
• Okutama Shuyu Road: 19.7 km, Santo Bridge (lake side) to Kuzuryu Bridge (Hinohara side)
• Gates: locked overnight. From 1 October to 31 March, 09:00–18:00
• Level: advanced. Experienced road cyclists, or an e-bike
• Supplies: two toilets in 19.7 km, and no confirmed vending machines
• Last convenience store: by Okutama Station. There is nothing west of it
• Autumn colour: high ground mid-to-late October, valleys in November — three to four weeks apart

Who This Ride Is For

Let’s be direct. The Okutama passes are not a casual rental-bike outing.

This is for people with their own bike, people who have climbed a thousand metres on a road bike before, or people willing to rent an e-bike locally. If none of those describes you, the Akigawa Valley in the second half of this article is the right answer instead — same mountains, same autumn colour, far gentler climbing.

The Okutama Shuyu Road and Kazahari Pass

The Gates Close at Night — and the Hours Change in October

This is the single most important practical fact. The Okutama Shuyu Road is gated at both ends and locked overnight, and the hours are seasonal.

The Tokyo Metropolitan Construction Bureau’s wording is that passage at night is, as a rule, not possible. Night access requires written police permission.

What that means. From October you cannot start the lake-side climb before 09:00. Sunset in Okutama on 1 November is 16:53. That leaves about seven usable hours. Most English write-ups quote the summer hours — don’t rely on them.

The road also closes when continuous rainfall exceeds 140 mm, and for snow.

1,146 m — the Highest Paved Road in Tokyo

Kazahari Pass is at the 12.8 km mark of the Shuyu Road, at 1,146 m, and is widely described as the highest road in Tokyo.

Stated precisely, it is the highest point on a paved public road. The adjacent Kazahari forest road, which is unpaved, reaches marginally higher ground. Either way, it is the highest point in Tokyo you can reach by bicycle on tarmac.

Just before the summit, the Tsukiyomi No. 1 car park at the 9.3 km mark (933 m) gives the best view of Lake Okutama on the whole road.

Two Toilets in 19.7 km

That is not an exaggeration. The facilities on the Shuyu Road are:

• 2.5 km: Santo spring — a natural spring
• 3.4 km: Yama-no-Furusato-mura — toilets, dining, public phone
• 9.3 km: Tsukiyomi No. 1 car park — no toilet
• 12.8 km: Kazahari Pass — no toilet
• 14.2 km: Sengen-one car park — no toilet, a shelter, and distant views of the Tokyo skyline and Skytree on clear days
• 16.1 km: Tomin-no-Mori — toilets, restaurant, shop

Between 3.4 km and 16.1 km — 12.7 km, across the highest ground — there is nothing. No vending machines could be confirmed anywhere on the road. Carry two bottles.

Tomin-no-Mori has free entry and free parking. Facility hours are 09:30–16:30 from 1 September to 15 November, and 09:30–16:00 from 16 November to 15 March. It normally closes on Mondays, but is open every day from 1 October to 30 November for the autumn-foliage season — good news if you are riding now.

About the Motorcycle Restrictions (Bicycles Are Not Affected)

This road has a history of two-wheeler restrictions that still confuses English-language forums. Motorcycles and mopeds were held to one-way travel on a 12.6 km section from December 2009 to March 2011, and there was another temporary motorcycle restriction in April 2019 after dangerous riding. There is no current restriction, and bicycles have never been subject to one.

The Arithmetic Is the Heart of This Article

Sunset, the Gate, and the Shop’s Opening Hours

Honestly: collecting a bike in central Tokyo in the morning and riding Kazahari Pass the same day does not work in autumn.

Run the numbers. CycleTrip BASE in Kanda Sudacho, four minutes from JR Akihabara, opens at 09:30 and closes at 17:30. With a bike in hand you are moving by about 09:50. Kanda to Okutama by train is 1 hour 40 minutes at the very best, including the mandatory change at Ome. You are on the bike in Okutama at 11:40.

From there you have to climb 1,146 m, descend, and get back to a train. The gate shuts at 18:00 and the sun sets at 16:53. It does not fit.

So: Collect the Bike the Day Before, or Rent Locally

Three workable answers:

1. Collect the bike the previous afternoon and take the first train. The first weekday departure from Ome toward Okutama is 05:18, which puts you climbing in the morning
2. Rent an e-bike locally — there is an operator right outside Okutama Station (below)
3. Stay overnight. There are cottages at Seoto-no-Yu in the Akigawa Valley, and inns in Hinohara and Okutama

Factor in the train frequency too. West of Ome the Ome Line runs roughly once an hour during the day, about twice an hour in the morning peak. The weekend Holiday Rapid has terminated at Ome since March 2023, so weekends bring no advantage and still require the change. The last train out of Okutama is around 23:00, so the binding constraint is daylight, not trains.

Getting a Bike

Renting Locally: TREKKLING, Outside Okutama Station

TREKKLING is at 197 Hikawa, Okutama — one minute from JR Okutama Station, next door to the Okutama Visitor Center. Open 09:00–17:00, with rental reception closing at 15:00, full-day rentals only. Closing days are irregular, so check their calendar. They have an English site.

The fleet mix matters enormously here, so here it is. Of about 73 bikes:

• E-bikes: 42 (Panasonic, HURRIER and others, five models)
• Cross bikes: 17
• Mountain bikes: 11
• Road and gravel bikes: 2

Two. Renting a road bike in Okutama is effectively not an option. Either you bring your own, or you accept an e-bike.

Prices only display once you select a date in the booking system. Liability insurance, a helmet and an original cycling map are included, and they will swap the bike out if you puncture — which is genuinely valuable given there is not a single bike shop in the town.

E-bikes in the Akigawa Valley

Tokyo Keikoku Cycling rents e-bikes only, at ¥3,500 a day through the app or ¥3,900 for a card-key day pass. Stations are at Musashi-Itsukaichi Station (an unmanned port beside the tourist information office, open 24/7), Seoto-no-Yu / Jurigi, Tokyo Urayama Base (09:00–17:00, closed Tuesdays), Musashi-Masuko and Tsurutsuru Onsen.

You can drop the bike at a different station, which makes a one-way run through the valley possible. Online membership registration is required first.

Two corrections while we are here. MINACLE, the seven-station rental network in Ome, has closed — it is still linked from the Ome tourism association’s own cycling page, so it is an easy mistake to inherit. And Akiruno has no HELLO CYCLING stations at all, per the city’s own page. Do not plan around share cycles anywhere in this geography.

Bringing a Bike from Central Tokyo

CycleTrip BASE has road bikes suitable for bagged transport. Shinjuku to Ome is about an hour on through Chuo–Ome services, then about 30 minutes to Okutama after the change. Starting from Musashi-Itsukaichi, the terminus of the Itsukaichi Line, means fewer changes and drops you at the foot of the Hinohara-side climb instead.

On JR East a bicycle travels free if fully disassembled and stored in a dedicated bag (three dimensions totalling 250 cm or less, 30 kg or less). An uncovered bike will be refused. Trains west of Ome are four cars and usually quiet outside commuter hours.

Route 1: Lake Okutama to Kazahari Pass

Okutama Station to Ogouchi Dam — the Tunnels Are the Real Hazard

From Okutama Station to Ogouchi Dam (Lake Okutama) is about 12 km on Route 411, the Ome Kaido, at a gentle gradient.

What to worry about here is not the climbing but the tunnels: narrow, poorly lit, no shoulder. A strong rear light is essential.

And before you leave, buy everything you need at the convenience store by Okutama Station (Times Mart Hikawa). There are only two convenience stores in the entire town, and none at all west of Okutama Station — not at the lake, not on the Shuyu Road.

The Floating Bridges Reopened in September 2026

This has not reached most sites yet. The Mugiyama and Tomura floating bridges across Lake Okutama were closed from January 2025 because of dangerously low water. The reservoir hit its lowest level since the start of the Heisei era in January 2026, prompting a public water-conservation request.

Heavy rain in early September turned it around: the reservoir was back to 85% (156.8 million m³) on 14 September 2026, roughly normal for the date. The Tokyo Waterworks Bureau announced on 25 September 2026 that both floating bridges had reopened, after some twenty months.

They are pedestrian-only, they float on pontoons and move underfoot, so walk, don’t ride. And they are removed again whenever the water drops — check the waterworks page before you go.

The access restriction on the Ogouchi Dam crest, in force from August, was also lifted on 10 September 2026.

Mizu to Midori no Fureaikan — the Most Reliable Water Stop

Next to the dam, the Mizu to Midori no Fureaikan visitor centre is free to enter, open 09:30–17:00, closed Wednesdays (Thursday if Wednesday is a holiday). The Katakuri-no-Hana restaurant runs 10:00–16:00 and serves venison with a view over the lake.

It has water dispensers and vending machines — the most reliable refill point on the lake, and your last chance before the Shuyu Road. Ride on a Wednesday and you lose it.

Tsukiyomi, and Then Kazahari

The climb starts at the Santo Bridge gate. At 9.3 km the Tsukiyomi No. 1 car park (933 m) gives the great lake view; at 12.8 km you reach Kazahari Pass (1,146 m).

In the interests of honesty: no reliable published gradient profile for Kazahari could be found. Every source gives only the 1,146 m figure. Commonly repeated rough numbers put the lake side at around 20 km averaging 4–5% from the dam at about 530 m, but that is unsourced. The character of the climb is long rather than steep.

At 14.2 km, Sengen-one car park has a shelter and, on a clear day, a distant view of central Tokyo’s towers and Skytree. Looking down at the city from a thousand-metre ridge inside its own prefecture is the moment this ride is for.

Descending to Tomin-no-Mori

Tomin-no-Mori at 16.1 km is the natural turnaround whichever side you climb from: toilets, restaurant, shop. If you come up from the Hinohara side, it is the only facility on the entire climb.

The Hinohara gate is at 18.9 km and Kuzuryu Bridge at 19.7 km; from there the Hinohara Kaido runs down to Musashi-Itsukaichi.

Near the foot of the Hinohara climb, Hinohara Onsen Center Kazuma-no-Yu (10:00–19:00, last admission 18:00, closed Mondays, ¥1,100, food from 11:00) is the practical base at either end of the day.

Route 2: The Akigawa Valley — the Gentler Alternative

If the pass is not the point, this is the better day. The valley road from Musashi-Itsukaichi climbs gently, carries far less traffic than the Ome Kaido, and holds the latest autumn colour in the region.

From Musashi-Itsukaichi to Ishibune Bridge

Ishibune Bridge, a 96-metre suspension footbridge near Seoto-no-Yu, is the signature image of the valley. It is pedestrian-only — walk the bike across.

Seoto-no-Yu

At 565 Otsu, Akiruno. Open 10:00–21:00 (last admission 20:30) — the latest-closing bath in this article, which counts after a long day. ¥1,000 for three hours. It closes only four times a year, on the second Wednesday of March, June, September and December.

It has cottages, making it a good base for an overnight, and it is also a Tokyo Keikoku Cycling rental station.

Hossawa Falls

Hossawa Falls is the only waterfall in Tokyo on Japan’s list of 100 famous waterfalls. Parking is free, and it is a 15-minute walk from there. The trail is wood-chip surfaced with steps, so park the bike and walk. There are toilets at the car park and the bus stop.

There are no gates and no closing time, but no lighting either, so it is not viewable after dark. The famous ice formation is a February phenomenon, not an autumn one.

Roads You Cannot Ride

Closures here are frequent and long-lasting. As of October 2026:

• Kobu Tunnel / Route 33: closed. A landslide at the Yamanashi-side portal from 22 September 2026, with no reopening timeline published. The link into Yamanashi is cut
• Iriyama Pass / Bonbori forest road: fully closed from 18 August 2025 to 13 August 2027 for pollen-source felling work
• Nokogiriyama forest road: closed for construction as of autumn 2026
• Nippara forest road: open to pedestrians only. Bicycles are legally vehicles in Japan, so riding is not permitted. Pushing is
• Mitake forest road: closed indefinitely following a road collapse
• Lake Okutama Ikoi-no-Michi: bicycles prohibited, per the waterworks bureau. Also closed 1 December to mid-April, with a collapse-risk caution notice near the dam embankment from September 2026
• Mitake Gorge promenade and the Okutama Mukashi-michi: both are walking routes with steps and cliff-edge sections. Park the bike and walk

Among the passes that are open, Wada Pass on the Hachioji side is the hardest: 3.5 km at an average of 10.4%, maximum 18%, 364 m of gain, essentially unbroken above 10% with sections over 15%. Otarumi Pass (Route 20, 3.6 km averaging 4.9%) is gentle but it is a trunk road with heavy traffic — fine as a connector, weak as a destination. Umegatani Pass is 1.6 km averaging 9.4% from the Ome side, 3.2 km averaging 5.1% from Itsukaichi.

Japan has no official gradient register for these roads, so those figures come from well-regarded cyclist databases built on GPS data. Good estimates, not official numbers.

About the Bears

This should be neither sensationalised nor waved away.

Okutama Town issued a mayoral emergency message on 14 July 2026. On 17 May 2026, a solo hiker carrying no bear bell was seriously injured by an adult bear roughly 500 m beyond the end of the Konakazawa forest road; in August 2025 an angler was harmed upstream on the Otanba river. The town has removed 20 bears over two years and patrols with the hunting association and police.

Tokyo added bear-specific provisions to its natural-park usage rules in July 2026, and publishes “TOKYO Kuma-map”, a live sightings dashboard with CSV and GPX downloads. Okutama, Hinohara, Ome, Akiruno, Hachioji and Hinode are all reporting municipalities.

The official advice:

• Carry and sound a bear bell, whistle or radio
• Early morning and dusk carry heightened risk. Do not go into the mountains before dawn
• Bear at a distance: leave calmly — do not run, do not shout
• Bear close by: do not turn your back. Back away slowly while facing it
• If attacked: lie face down, curl up, hands clasped behind the neck, elbows guarding the face

A realistic assessment for cyclists. Every documented injury here has happened on forest roads, trails or riverbanks, to people on foot, usually alone. No incident involving a cyclist on a sealed metropolitan road appears in the record. Riding the Shuyu Road or the Ome Kaido in daylight, at speed, making noise, the risk is low. It becomes real if you go up a forest road — most of the relevant ones are closed anyway — stop alone in woodland, or ride at dawn or dusk, which the 09:00 gate and 16:53 sunset already discourage.

Put a bell on the bars, don’t ride before dawn or after sunset, stay off the forest roads, and check the Kuma-map before you leave. That is proportionate.

Kit, and the Two Hours It Takes for Help to Arrive

Mobile coverage here has significant gaps on every carrier. A 2022 survey found Docomo best but with substantial dead zones, au with no signal across roughly 70–80%, and Rakuten Mobile dead even on the Ome Kaido approach. The data is a few years old, but the gaps are terrain-driven and will persist.

The road also carries official signs stating that an ambulance takes about two hours to reach it.

Put those two together and the kit conversation becomes simple. Download offline maps. Do not rely on your phone. Ride with someone if you can.

There is no bike shop in Okutama Town. TREKKLING will swap out its own rentals but is not a repair shop for your bike; the nearest options are in Ome. Carry a tube, a pump, a multitool and a quick link. A mechanical at Kazahari means a very long walk.

For medical care, Okutama Hospital (1111 Hikawa, 0428-83-2145) is a Tokyo-designated secondary emergency facility accepting emergencies around the clock — but call before you arrive, as it cannot handle every condition. Serious trauma goes to Ome Municipal General Medical Center. Without Japanese health insurance, expect a deposit of roughly ¥5,000–10,000 on arrival.

One word about beer. There is a craft brewery, VERTERE, near Okutama Station, and after you have handed the bike back or bagged it for the train, it is a fine way to finish. But drinking and riding is a criminal offence. Since the Road Traffic Act revision of 1 November 2024, cycling under the influence carries up to three years’ imprisonment or a ¥500,000 fine, and serving alcohol to someone who will then cycle is itself an offence. On-the-spot tickets for cycling violations arrived in April 2026. Finish the ride first.

When the Leaves Turn

The interesting thing about autumn in Okutama is that the colour arrives three to four weeks apart depending on altitude — something generic “autumn in Tokyo” guides never mention.

For a ride spanning both altitudes, roughly 5 to 20 November is the window — the high ground just past peak, the valleys at theirs.

The Kazahari timing is inferred from altitude; no separate source for it could be found.

Sunset falls at 17:13 on 15 October, 16:53 on 1 November, and 16:35 on 30 November. In deep valleys the usable light ends 30 to 45 minutes before those times. From November the binding constraint is daylight, not the gate. The gate shuts at 18:00; the sun sets at 16:53. Be off the mountain by 16:00.

Winter has no chain-regulation system — the road simply closes. Documented snow closures cluster in January and February. Treat early December as the realistic end of the season.

Wrap-Up

Kazahari Pass is inside Tokyo. That fact carries most of the value of this day. Not many cities let you reach 1,146 metres by train and pedal without ever leaving the municipal boundary.

But this is not a casual place. The gate opens at nine and shuts at six. Two toilets in 19.7 km. No shop west of Okutama Station. Patchy signal, a two-hour ambulance, and exactly two rentable road bikes in the town.

So planning is everything. Collect the bike the day before or rent an e-bike locally. Buy food and water by the station. Carry a tube and a pump. Put a bell on the bars. Be down by four. Then hand the bike back and have the beer.

And if the pass feels like too much, go to the Akigawa Valley instead. Same mountains, same colour, half the climbing — and the onsen stays open until nine.