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⏵ Course guide · California ultra

Ohlone Wilderness 50K Course Guide

The Ohlone Wilderness 50K is a point-to-point traverse of the East Bay hills, from Mission Peak in Fremont over the high point at Rose Peak and down to Del Valle, and it is widely called one of the toughest 50Ks in the country. Near 8,000 feet of climbing, almost no flat, and a May start that can cook you on the open grass. I will walk you through the course first, then give you a pacing and fueling plan that fits the vert and the heat. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

Ohlone Wilderness 50K quick facts

Date
Typically mid-to-late May (recent editions land on a Sunday)
Location
Point to point, Fremont (Mission Peak) to Del Valle Regional Park, East Bay, CA
Distance
50K (about 31 miles)
Elevation gain
Near 8,000 ft climbing (over Mission Peak 2,517 ft and Rose Peak 3,817 ft), about 7,440 ft of descent
Start
8:00 AM at Mission Peak, Fremont
Cutoff
About 9 hours overall (roughly a 5:00 PM finish); confirm the current limit with the race
Aid
7 staffed aid stations plus 1 self-service water stop; crew access only at Sunol (mile 9.11)
Qualifier
No Western States, UTMB, or Hardrock qualifier status listed by the race

These facts come from the official race site, the ATRA event listing, and UltraSignup. Check the current date, cutoffs, and aid stations in the race-day details before you commit. Race logistics change year to year.

The course: where Ohlone is won and lost

This is a true point-to-point, about 31 miles from Mission Peak in Fremont across the Ohlone Wilderness Trail to the finish at Del Valle Regional Park. You pass through four East Bay Regional Parklands, Mission Peak, Sunol, Ohlone, and Del Valle, on a mix of single-track and exposed fire road. The defining number is the climbing: near 8,000 feet, with almost no flat anywhere.

The first punch: up Mission Peak right out of the gate

There is no easing into this one. The race climbs Mission Peak in the first few miles, a long grassy grunt up to 2,517 feet that gets your heart rate high before your legs are warm. Hike it with discipline. The classic mistake is treating the early climb like it is the hard part and pushing it, then realizing the real high point, Rose Peak, is still hours and a lot of vert away.

Get to the top of Mission Peak having spent as little as possible. You want to crest it feeling like you have barely started, because as far as the climbing goes, you basically have.

The long pull to Rose Peak

After the drop toward Sunol, where the only crew access on the course sits around mile 9, the course settles into the relentless rolling middle on the way to Rose Peak, the 3,817-foot high point of the day. None of it is flat. You are either climbing or descending the entire time, on grass, fire road, and rutted single-track, and the cumulative gain is what wears people down more than any single climb.

This is where you bank a smart race or unravel a careless one. Keep the effort even, power-hike the steep stuff without guilt, and keep eating and drinking on a schedule. The exposed terrain and the May sun mean the heat is climbing right alongside you, so do not let a good early split tempt you into overcooking the middle.

The descent to Del Valle: fast, rough, and quad-wrecking

From the high country it is a long way down to the finish near 390 feet at Del Valle, which means thousands of feet of descent stacked into the back of the race. It is fast if you saved your legs, and miserable if you did not. The footing is rocky and rutted in places, and after hours of climbing your quads are already taxed, so this is exactly where badly paced runners fall apart and shuffle it in.

Train downhill running specifically before race day. Being able to keep your legs turning over on rough descents late, when your quads are cooked and it is hot, is honestly what separates a strong Ohlone finish from a long, painful one.

The heat and the gaps between aid

Ohlone is famous for heat. Late May in these hills bakes the open grassland and chaparral, and there is very little shade out there, so the temperature is often the single hardest part of the day. There are 7 staffed aid stations plus a self-service water stop, but the gaps can be long and fully exposed, and crew can only reach you at Sunol around mile 9. Carry enough fluid and calories to get yourself across each gap and do not assume the next aid is close.

Plan for the sun from the first mile, not as something you react to when you are already cooked. Start hydrated, keep sipping, and use every aid station to top off, douse yourself, and get ice if it is offered.

Pacing strategy for a climbing-heavy, hot 50K

With near 8,000 feet of gain and almost no flat, Ohlone is about managing effort, not chasing a pace chart. Run the climbs by feel, not by your flat-ground splits, and leave something for that long descent to Del Valle.

Pace the climbs by grade, not by the watch

Your flat-ground pace means nothing going up Mission Peak or pulling toward Rose Peak. What matters is grade-adjusted effort, so hold a steady output you can sustain up the grade and hike the steep pitches without feeling like you are giving up time. The number-one Ohlone mistake is running the early climbs too hard because they feel manageable, then blowing up in the heat. Use a grade-adjusted pace to turn your real fitness into honest climbing and descending targets so you do not torch the first half.

Build a vert-aware finish prediction

Do not guess your Ohlone finish off a road 50K time. Near 8,000 feet of climbing, the rough footing, and the May heat all add real time, and the roughly 9-hour cutoff means you actually need to know your window. A vert-aware finish prediction that accounts for this course profile gives you a realistic target and lets you work back into the cutoff, so you know how much buffer you really have instead of hoping.

⏵ Free tools to pace this course

Fueling strategy for the heat and the duration

Most runners are out on the Ohlone 50K for somewhere around 5 to 9 hours in the heat, with serious vert and long exposed gaps between aid. That makes carbohydrate, sodium, and fluid every bit as important as fitness.

Carbs: steady and trained

For a 5 to 9 hour effort, aim for around 60 to 90 grams of carbohydrate per hour, and only push the higher end if your gut is trained for it. Heat kills your appetite and slows your stomach, so keep your intake steady and easy to get down rather than gambling on big catch-up doses late. Practice your exact race-day carb rate on hot, hilly long runs so 80-plus grams an hour feels routine, not like an experiment you are running on race morning.

Sodium and fluid: plan for the May heat and the gaps

In the heat, lean toward the high end on sodium, often around 500 to 700 milligrams per liter of fluid, and more if you are a heavy or salty sweater. Just as important, carry enough fluid to get across the long, exposed stretches between stations instead of rationing and showing up empty, because crew can only reach you at Sunol around mile 9. Weigh yourself before and after a hot long run to find your real sweat rate, then build the plan around your own number.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the Ohlone heat with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.

⏵ Train for it with Summit Line

Get a race-day plan built around YOUR fitness, this exact Ohlone course profile, and your projected splits. Summit Line reads your real training, builds a plan for near 8,000 feet of climbing, and rehearses your fueling so race day is something you execute, not guess at.

Start free →Explore the demo

Ohlone Wilderness 50K FAQ

How hard is the Ohlone Wilderness 50K?

It is widely called one of the toughest 50Ks in the country, and the reputation is earned. You cover about 31 miles with near 8,000 feet of climbing on trail and fire road, going over Mission Peak early and topping out on 3,817-foot Rose Peak, and late May in the East Bay can be brutally hot on exposed grass and chaparral. The overall cutoff is roughly 9 hours, so this is a steady-climbing, heat-managing day, not a fast road 50K. If you respect the vert and the sun, it is doable for a prepared ultrarunner.

How much climbing is in the Ohlone Wilderness 50K?

Close to 8,000 feet of total gain across the point-to-point course, with about 7,440 feet of descent on the way to Del Valle. The big ones are the grind up Mission Peak in the first few miles (2,517 ft) and the long pull to Rose Peak (3,817 ft), the high point of the day, but the whole traverse is relentlessly rolling with very little flat. Add it up and you are climbing or descending almost the entire race.

How should I fuel for the Ohlone Wilderness 50K?

Treat it as a hot, roughly 5 to 9 hour effort with serious vert and long, exposed gaps between aid. Most runners do well on about 60 to 90 grams of carbohydrate per hour, leaning to the higher end only if your gut is trained for it, plus sodium that climbs with the heat. Crew access is only at Sunol around mile 9, so you are mostly self-supported between the staffed stations and need to carry enough fluid and calories to cover them. Run your own numbers for your weight, goal time, and the forecast with the free ultra fueling calculator.

What is the cutoff for the Ohlone Wilderness 50K?

The race has historically run an overall limit of about 9 hours, with an 8:00 AM start and a finish at Del Valle by roughly 5:00 PM. With near 8,000 feet of climbing and the May heat, that cutoff is real, so you cannot bank on making it all up late. Confirm the exact overall and any intermediate cutoffs in the current race-day details before you commit, since limits can change year to year.

What is the terrain and weather like at Ohlone?

The course is a point-to-point traverse of the Ohlone Wilderness Trail across four East Bay Regional Parklands: Mission Peak, Sunol, Ohlone, and Del Valle. Expect a mix of single-track and exposed fire road, steep grassy climbs, rocky and rutted descents, and very little shade, dropping from the high country near Rose Peak all the way down to about 390 feet at the finish. Late May in these hills is famous for heat, with open ridgelines and grassland that bake in the sun, so the temperature is often the hardest part of the day.

Is the Ohlone Wilderness 50K a good first 50K?

It can be a great goal race, but it is a hard place to start. The climbing, the exposure, the heat, and a roughly 9-hour cutoff all ask for specific prep: long days with real vert, practice on steep grassy climbs and rough descents, and a fueling and hydration plan you have rehearsed when it is hot. If you have done the work, the finish at Del Valle is one of the more satisfying in the Bay Area. If you have not trained the climbs and the heat, this is not the one to wing.

This guide is independent and for planning only. The course details, dates, cutoffs, and aid stations come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.