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Bishop High Sierra Ultras Course Guide

The Bishop High Sierra Ultras run high, dry, and exposed in the Eastern Sierra above Bishop, on rough 4WD dirt roads that climb and keep climbing. Thin air, almost no shade, a cold start and a hot afternoon, four distances from 20 miles to 100K. I will walk you through the course, then give you pacing and fueling that is built for exactly those conditions, plus free tools to dial in your own numbers.

⏵ Quick facts

The Bishop High Sierra Ultras at a glance

Date
Sat, May 15, 2027 (mid-May annually)
Location
Eastern Sierra, above Bishop, CA
Start / Finish
Millpond County Park, about 5 mi north of Bishop
Distances
100K, 50M, 50K, 20M
Altitude
Much of the long courses above 7,000 ft; high point near 9,385 ft
Elevation gain
About 8,800 ft of climb on the 50 mile; more on the 100K
Terrain
Mostly rough 4WD dirt road, some singletrack, brief pavement
Time limit
Roughly a 19 hour overall allowance

Note: the event has held a steady mid-May date for years, and the next edition is listed for Saturday, May 15, 2027. In rare heavy-snow years the organizers have used an alternate snow course. So always confirm the date, exact distances, course, aid stations, and cutoffs on the official Bishop High Sierra Ultras site before you plan your race.

The course

Every distance starts and finishes at Millpond County Park, about five miles north of Bishop. The routes run almost entirely on rugged four-wheel-drive dirt roads, with a couple of singletrack sections and a tiny bit of pavement, climbing up into the foothills of the Eastern Sierra. There are barely any trees, so the race is exposed, dry, often hot, sometimes rocky, and mostly high. On the 50 mile and 100K, much of the course sits above 7,000 feet, with long stretches above 8,000 feet.

Out of Millpond and up toward the Tungsten Hills

You start in the cool dark at Millpond, head through the campground, then go north and west around the Tungsten Hills, where the first aid station comes at about mile 4.5. From there the route settles onto rough 4WD road and keeps gaining, working into a bit of forest near the McGee Creek area before it climbs to the busy Edison aid station. This early stretch is runnable, and that is the trap. It feels easy to push while your legs are fresh and the air is still cool.

So bank patience, not time. Climb the early grades by effort, keep your breathing under control as the altitude builds, and do not race the runnable dirt before you have any idea how the thin air and the afternoon heat are going to treat you.

The Edison Loop and the high point

On the 50 mile and 100K, the route takes on the famous Edison Loop, named for the hydro installations in the area. It climbs steadily, with only the odd tree for cover, up to a rustic high aid station near 9,385 feet, the high point of the loop. This is where the altitude stops being polite. Every grade costs more than it would at home, and the runners who pushed the early miles tend to pay the bill right here.

Run this high section by feel. Power-hike the steep pitches with purpose, keep eating and drinking even when your appetite quits in the thin air, and treat the high ground as a place to stay smooth and efficient instead of chasing a pace.

Exposure, heat, and where the race is won or lost

Here is the thing about Bishop. The climbs are not what get you, the exposure is. With almost no shade, the open dirt roads bake through late morning and afternoon, and the day can climb from the high 40s at the start into the 90s by late afternoon, with breezes that turn into stiff wind on the high ground. It is the heat and the dehydration, not the climbs alone, that fade most well-trained runners here.

So hydration and sodium discipline are the real race. Carry enough fluid to cover the gaps between aid on the exposed high sections, keep your electrolytes up, and use those well-stocked aid stations to cool down, top off, and eat real food. Treat the hottest hours as survival, hold your effort steady, and run again as the afternoon eases and the evening cools.

Aid stations and cutoffs

Aid stations come often, spaced roughly every 3 to 7 miles, and they are famous for offering way more than standard race fare, especially deeper into the day. Drop bags are allowed at the major checkpoints, so plan your fuel, layers, and lighting around them.

The overall allowance is generous, on the order of 19 hours for the long-course finishers, with the 100K closing in the late evening. There are intermediate cutoffs along the way, so check the official cutoff chart for the current edition and build your pacing plan backward from those times. Give yourself a buffer. The altitude and the hot, exposed afternoon all gang up to slow you late.

Pacing strategy for Bishop

A high, dry, exposed, climbing-heavy course rewards patience and punishes ego. Pace Bishop by effort and by grade in the thin air, not by the flat-ground numbers from your home runs.

Pace the climbs by grade, not by clock

With roughly 8,800 feet of climb on the 50 mile and more on the 100K, your moving pace will swing all over the place between the long dirt-road grades and the runnable flats. And that is fine. Power-hike the steep pitches efficiently and run the gentler grades. Trying to hold a steady minutes-per-mile number across this terrain, in thin air, is a fast way to cook the climbs and have nothing left for the hot afternoon.

Use our free grade-adjusted pace calculator to turn your flat fitness into honest effort targets for the Bishop climbs, so you know whether you are pacing the vertical you can hold or burning matches you will want later in the day.

Respect the altitude and the heat curve

On the long courses you spend hours above 8,000 feet, so the early climbs feel harder than the same grade at sea level. Pace the high sections easy by breathing and effort, and expect the hot, exposed afternoon to be the slowest part of your day. Plan a middle that is on purpose easier, protect your core temperature, then let your pace come back as the evening cools. But only if you stayed disciplined and kept eating through the heat.

To set a finish goal that actually accounts for all that vertical, use our vert-aware race time calculator. It factors the climbing into your projected finish, so you are not anchored to a flat-course estimate that the Eastern Sierra will quietly tear apart.

Reality-check your goal before you commit

Bishop runs at four distances, and picking a smart goal pace for the 100K, 50 mile, 50K, or 20M starts with an honest read of your current fitness against this kind of terrain and altitude. A finish time that looks fine on paper at sea level can be way too aggressive once you add thin air and a treeless afternoon.

Use our race equivalent calculator to turn a recent race result into a realistic target for the distance you are running here, then build your aid-to-aid splits around that number instead of a hopeful guess.

Fueling strategy for Bishop

A high, dry, exposed, all-day effort makes fueling and hydration just as decisive as fitness. Altitude kills your appetite and the afternoon heat drives sweat loss, so plan for both.

Carbs: ramp to the high end, on a trained gut

For an effort this long, aim for roughly 60 to 90 grams of carbohydrate per hour, leaning toward the high end once your gut is trained to handle it. Use a glucose-plus-fructose blend so you can absorb more than a single sugar lets you, and practice your exact hourly number on long runs so it feels routine, not experimental, by race day.

Altitude makes this harder. The thin air and dry climbs kill your appetite right when you need calories most. Liquid and gel calories usually go down easier up high than solid food, so build in an option you can keep taking when you stop wanting to chew, and keep eating through the hot middle hours even when you do not feel like it.

Sodium and fluid: built for the exposure

On the treeless, often hot dirt roads, you can lose a lot of sweat, so push your sodium toward 500 to 800 mg per liter of fluid and carry enough to cover the long, exposed gaps between aid. Cramping, a sloshy stomach, that wrung-out late-race feeling: those are usually fluid and sodium problems, not fitness problems. And the dry air hides how much you are actually losing.

Dial in a plan of your own with our free ultra fueling calculator. Enter your weight, your goal time, and the expected heat, and it gives you a carb, sodium, fluid, and caffeine prescription per hour built for the Bishop duration and conditions. Then go test it in training before race day.

⏵ Free calculators for this race

Run your Bishop numbers with our free, no-signup tools, then let Summit Line tie them all to your real fitness and this exact course. No guessing.

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Train for the conditions

Bishop rewards specific prep. Vert in the legs, lungs that handle thin air, and a heat and fueling plan that holds up on the exposed high ground. These free guides go deeper on each.

⏵ Train for Bishop High Sierra

Get a race-day plan dialed to YOUR fitness and this exact course. Summit Line reads your actual training, builds fueling and pacing around the Bishop altitude, climbing, and heat, and tracks how your gut and legs handle the load, so race day is rehearsed, not guessed.

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Bishop High Sierra Ultras FAQ

How hard is the Bishop High Sierra Ultras?

Bishop is hard in its own way. It is high, exposed, dry, and it just keeps climbing on rough dirt roads. The 50 mile carries roughly 8,800 feet of climbing and the 100K adds more, and on the long courses much of the route sits above 7,000 feet with long stretches above 8,000 feet and a high point near 9,385 feet. There are barely any trees, so you are out in the sun and the wind for hours. It is not technical mountain singletrack the way some 100 milers are. But the altitude and the heat and the steady vert add up, and that is what makes it a real test, run at four distances (100K, 50M, 50K, 20M).

How much climbing is in the Bishop High Sierra Ultras?

The 50 mile course carries roughly 8,800 feet of climbing, and the 100K piles on more as it covers more high ground. The shorter 50K and 20M take in less, but they still climb hard for their length, because the whole event runs on rolling 4WD dirt roads that keep gaining and losing elevation instead of handing you flat miles. And on the long courses you sit above 8,000 feet for a big chunk of the day, so you are climbing in thin air. Every grade feels steeper than the same hill at sea level.

How should I fuel for the Bishop High Sierra Ultras?

Fuel for a high, dry, exposed day. Most runners aim for 60 to 90 grams of carbohydrate per hour, leaning to the high end once the gut is trained, and lean a little more on liquid calories because altitude and dry air can kill your appetite. Push your sodium toward the high end too, roughly 500 to 800 mg per liter of fluid, because those exposed, often hot afternoons drive real sweat loss. Carry enough fluid to cover the aid gaps on the high, treeless sections. The aid stations here are famous for being well stocked with real food, so use them. Our free ultra fueling calculator builds a per-hour carb, sodium, and fluid plan for the expected duration and heat.

What are the cutoffs at the Bishop High Sierra Ultras?

The event gives you a generous overall allowance, on the order of 19 hours for the long-course finishers, with the 100K closing in the late evening. There are intermediate cutoffs along the course too, and the race publishes the exact checkpoint times for the current edition. Do not let that allowance fool you into dawdling. The front half climbs into thin air early, so keep moving with margin, or the altitude and the hot afternoon will put you behind the clock late in the day. Always confirm the current cutoff chart on the official race site before you build your plan.

Is the Bishop High Sierra Ultras at altitude, and does that matter?

Yes, and it matters a lot. On the 50 mile and 100K, much of the course sits above 7,000 feet, with long stretches above 8,000 feet and a high point near 9,385 feet on the Edison Loop. If you are coming from sea level, that thin air makes the climbs feel harder, and it can wreck your appetite and your sleep the night before. Getting there a few days early to start adjusting helps, and so does some altitude prep at home. On race day, pace the high sections by your breathing and effort, not by your flatland pace numbers.

What is the weather like at the Bishop High Sierra Ultras?

Mid-May in the Eastern Sierra is usually fine and sunny. But it swings. The race has seen it all, cold to hot, dry to snowing. A typical day runs from the high 40s at the early start to the 90s by late afternoon, with breezes that can turn into strong wind on the exposed high ground, then it cools off in the evening. In a heavy snow year the organizers have sometimes used an alternate snow course. So plan for a cold start and a hot, exposed, windy afternoon, and check the forecast and any course updates in the last few days before the race.

This guide is for planning and training, and it reflects publicly available information about the Bishop High Sierra Ultras. Race details, including the date, distances, course, aid stations, and cutoffs, can change year to year, and a heavy-snow year can trigger an alternate course. So always confirm the current specifics on the official Bishop High Sierra Ultras race website before you train or travel.