Graeagle, CA, United States · Saturday, July 24, 2027

Fixed Distance 100K

Lost Sierra Endurance Run 100Km

311 days away
100 km Distance
not publishedn/a Climbing
5.0 est Grit · Challenging

Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.

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39.7533° N, 120.6484° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~37 Small. Long stretches with nobody in sight.

DUV results for the 2026 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, July

Daytime high 31°C
Night low 12°C
Rainfall Dry — rain unlikely
Daylight 14 h 31 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 1619 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert
🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 100 km of trail.

  • Trail Running Shoes100 km of trail — cushioning that is still there in the last quarter.
  • Race NutritionPast 100 km the palate quits before the legs do — carry more than one flavour.
  • Hydration VestsFlask capacity for 100 km, without the bounce.
  • Headlamps100 km almost certainly means running into the night.
  • AccessoriesChafe and blisters end more 100 km races than fitness does.

Adidas

Terrex Agravic Speed Ultra

★★★★★ 4.5

Asics

Trabuco Max 3

★★★★★ 4.6

Spring Energy

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Buff

CoolNet UV+ Multifunctional

UPF 50+ neck gaiter with cooling technology. Desert and sun essential.

$25 ★★★★★ 4.5
All gear guides →

Course Notes

The racecourse starts in downtown Graeagle, climbs to the crest of the Sierra, skirts the edges of a half-dozen alpine lakes, summits two rugged peaks, and then descends 4,000’ back into Graeagle for the finish.

Similar races

Other 100K trail ultras, closest in distance first.