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⏵ Course guide · Washington ultra

White River 50 Mile Endurance Run Course Guide

The White River 50 is the old guard of Washington ultras, a classic Cascade 50 miler that runs out of Ranger Creek near Mount Rainier and packs about 10,200 feet of climbing into two big climbs. It rewards patience and punishes anyone who races the first half. I will walk you through the course first, then give you a pacing and fueling plan that fits the vert and the long Sun Top grind. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

White River 50 quick facts

Date
Saturday, July 25, 2026
Location
Ranger Creek / Buck Creek Recreation Area near Greenwater, WA, in the Mount Rainier / Crystal Mountain corner of the Cascades
Distances
50 Mile, 50K, and 25K (all start and finish at Ranger Creek)
Elevation gain
50M: about 10,200 ft · 50K: about 5,900 ft · 25K: about 3,700 ft
Start
6:00 AM (50M and 50K), 7:00 AM (25K), with early-start options
Cutoff
50M: 14.5 hr (8:30 PM) with intermediate aid cutoffs · 50K: about 12 hr · 25K: about 7 hr
Aid stations
50M: 6 full-service · 50K: 3 · 25K: 1

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

The course: where White River is won and lost

The 50 mile course is essentially two big out-and-up climbs hung off the start/finish at Ranger Creek, about 50 miles and 10,200 feet of gain on a Cascade mix of forest road, wide trail, and rooty singletrack. You start with a flat warmup along the Ranger Creek airstrip and the Skookum Flats trail, then the real work begins. The whole race comes down to how you handle the two climbs and the long descent off Sun Top.

Climb one: Palisades up to the Corral Pass ridge

After the flat opening miles you turn uphill onto the Palisades Trail and start the first big climb. A lot of it is a reasonable grade, but there is a steep ravine section (there is even a stairwell) that will get your attention early. You gain a big chunk in the first few miles, then it goes rolling along the high ridges out toward Corral Pass with the kind of Mount Rainier views that make you forget you are working.

This is the trap. The first climb feels good because you are fresh and the views are huge, and people hammer it. Do not. Hike the steep pitches, keep your effort honest, and treat this whole first climb as setup for the real test later. The runners who float the early ridge and the runners who race it look the same here, and look very different at mile 40.

The Corral descent and the Buck Creek low point

Off the ridge you get a long descent (somewhere around 3,000 feet over five-plus miles) down toward Buck Creek, then a stretch of flat and rolling valley. This is fast, free real estate if your quads are still alive, so be smooth and let gravity do the work without slamming every step. Buck Creek is the low point of the course in both senses: lowest elevation and the spot where you regroup before the big one.

Use this section to eat and drink ahead of the climb. The Sun Top grind is not the place to be playing catch-up on calories, so top off your bottles, get food in, and go into the second climb with a full tank.

Climb two: the long Sun Top grind (this is the race)

From Buck you start the second and final major climb, and it is a monster: roughly 8.5 miles of sustained uphill to the top of the Sun Top Trail around mile 36.5. By the time you reach the Sun Top aid station you will have done something like 94 percent of the entire day’s climbing. This is where White River is actually decided. If you paced the first half right you can settle into a steady power-hike and grind it out. If you raced the early ridge, this climb is where the wheels come off.

Break it into chunks, keep eating, and do not stare at how far is left. Steady effort up the grade beats hero pacing every single time on a climb this long, this late.

The Sun Top descent and Skookum Flats home

From the top of Sun Top it is a fast, steep descent of around 3,200 feet in about 6.5 miles, and most of it is on forest service road. It is the rare part of the day where you can really open up, but smooth road descending on cooked quads is its own skill, and this is where badly paced legs turn to concrete. If you saved something, you fly here. If you did not, it is a long, sore shuffle down.

The last roughly 7 miles roll back along the Skookum Flats trail to the finish, and it is sneaky: it actually gains about 500 feet and the footing has you hopping roots and rocks when you are tired and ready to be done. Respect this finish. It is not a victory lap, it is a final little tax before Ranger Creek.

Pacing strategy for two big climbs and 10,200 feet

With the vert front-loaded onto two sustained climbs and the hardest one coming late, White River is about managing effort, not chasing a pace chart. The single biggest mistake here is racing the first climb. Run the climbs by feel, save your quads for the Sun Top descent, and keep enough in the tank for that sneaky Skookum finish.

Pace the climbs by grade, not by the watch

Your flat-ground pace is meaningless on the Palisades climb and even more meaningless on the long Sun Top grind. What matters is grade-adjusted effort: hold a steady output you can sustain up the hill and hike the steep pitches without feeling like you are losing the race. The classic White River blowup is running the early ridge too hard because it feels easy and the views are great, then unraveling on Sun Top. Use a grade-adjusted pace to turn your real flat 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 White River time off a road 50 or a flat 50K. The 10,200 feet of gain, the rooty singletrack, and that long road descent all add real time and change where your effort goes. A vert-aware finish prediction that accounts for this course’s climbing gives you a realistic window and lets you work backward into the intermediate aid cutoffs, so you actually know how much buffer you have at Corral, Buck, and Sun Top instead of finding out the hard way.

⏵ Free tools to pace this course

Fueling strategy for a 10 to 14 hour mountain day

Most runners are out on the White River 50 for somewhere between 10 and 14 hours, with a lot of that time spent climbing. That makes carbohydrate, sodium, and fluid every bit as important as your legs, especially heading into the long Sun Top climb.

Carbs: steady, trained, and keep eating on the climbs

For a 10 to 14 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. The danger zone is the climbs: it is easy to stop eating when you are working hard and grinding uphill, and then you are running on empty by the time you crest Sun Top. Keep food coming on a schedule, not just when you feel like it, and practice your exact race-day carb rate on long hilly runs so 80-plus grams an hour feels routine instead of like an experiment.

Sodium and fluid: plan for warm ridges and the descents

Late July near Rainier can swing from cool forest to hot, exposed ridge, so plan your sodium for the warm end and adjust on the day. Many runners do well around 400 to 700 milligrams of sodium per liter of fluid, more if you are a heavy or salty sweater. Carry enough to get comfortably between aid stations rather than rationing to the next one, and use the long descents to drink and settle your stomach. Weigh yourself before and after a hot long run to find your real sweat rate, then build the plan around your own number instead of a generic one.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the White River climbs 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 White River course profile, and your projected splits. Summit Line reads your real training, builds a plan for the two big climbs, and rehearses your fueling so race day is something you execute, not guess at.

Start free →Explore the demo

White River 50 FAQ

How hard is the White River 50 Mile Endurance Run?

White River is a genuinely hard mountain 50 miler, but it is a fair one. The 50 mile course covers roughly 50 miles with about 10,200 feet of climbing built into two big sustained climbs, on a mix of dirt road, wide trail, and Cascade singletrack near Mount Rainier. What makes it hard is the back-half climb up Sun Top, which is around 8.5 miles long and stacks up the bulk of the day’s vert when your legs are already tired. The overall cutoff is 14.5 hours with intermediate aid-station cutoffs, so a prepared runner who climbs patiently and fuels well has real room to finish, but you cannot fake the fitness.

How much climbing is in the White River 50?

The 50 mile course has about 10,200 feet of total elevation gain (and the same amount of descent, since it finishes where it starts). It is front-loaded onto two major climbs: the first goes up the Palisades Trail and rolls along the ridges past Corral Pass, and the second is the long grind up to Sun Top. By the time you top out at the Sun Top aid station around mile 36.5, you have done roughly 94 percent of the total climbing. The 50K has about 5,900 feet of gain and the 25K about 3,700, on the same kind of terrain.

What are the cutoff times for the White River 50?

The 50 mile race has an overall limit of about 14.5 hours, with a hard course cutoff near 8:30 PM from the standard 6:00 AM start. There are also intermediate cutoffs at the aid stations along the way (Palisades, Corral, Buck, Fawn Ridge, Sun Top, and Skookum), so you cannot bank all your buffer for the end and you have to keep moving through the first climb. The 50K runs around 12 hours and the 25K around 7. Always confirm the exact intermediate cutoffs and any early-start rules in the current race-day details before you toe the line.

What is the terrain and weather like at White River?

The footing is a Cascade mix: some dirt forest road, some wide trail, and long stretches of true singletrack with roots and rocks, plus exposed ridge running up high with big Mount Rainier views. Late July near Rainier can be anything from cool and damp under the forest canopy to genuinely hot and sunny up on the open ridges, so you have to plan for both. The long Sun Top descent is on forest service road, which is fast but pounds your quads. Snow is usually gone by late July, but the high ridges can still get weather, so do not assume it stays warm all day.

Is the White River 50 a Western States or UTMB qualifier?

Qualifier status changes year to year, so do not take this guide as the final word. White River is a long-running, competitive 50 miler with deep history (Anton Krupicka and Uli Steidl both held the course record over the years, and the men’s mark has since dropped into the 6-hour range), and races like it have often appeared on qualifier lists. But the current Western States, Hardrock, and UTMB qualifying lists move around, so check the official race page and the qualifier program’s own site for the year you are targeting rather than assuming.

Is the White River 50 a good first 50 miler?

It is a popular first 50 for a reason: it is well organized, the aid is solid, the cutoff is generous, and the course is beautiful. That said, it is not an easy first 50. The 10,200 feet of climbing, the long Sun Top grind late in the day, and the quad-trashing road descent all reward specific prep. If you train the climbs, get your legs used to long downhill on tired quads, and rehearse a fueling plan you can hold for 10 to 14 hours, the 14.5-hour cutoff gives most committed first-timers room to get it done.

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.