Willamette Pass Ski Area, OR, United States · Saturday, August 1, 2026

Fixed Distance 100K

Waldo 100K Trail Run

Race completed
100 km Distance
3,350 m Climbing
10.0 Grit · Elite / extreme
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What the course asks

Climbing rate 34 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.
Time limit 16 hours 9:36 min/km average. Comfortable. Room to walk the climbs and stop at aid. About average for a 100K. Measured against 208 races of the same distance. Cut-off calculator →
Field size ~131 Mid-sized. Company early, well spread out by halfway.

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, August

Daylight 14 h 04 m of light

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert
👟 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 with 3,350 m of ascent.

  • Trail Running Shoes34 m of climb per kilometre — grip and rock protection before cushioning.
  • Race NutritionPast 100 km the palate quits before the legs do — carry more than one flavour.
  • Hydration VestsPole attachment and chest-strap stability on steep ground.
  • Trekking Poles3,350 m of ascent to walk up.
  • HeadlampsA 16 h limit puts you out there after dark.

Adidas

Terrex Agravic Speed Ultra

★★★★★ 4.5

Asics

Trabuco Max 3

★★★★★ 4.6

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Nathan

VaporKrar 12L

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

$170 ★★★★★ 4.6

LEKI

Ultratrail FX.One

Ultra-light carbon folding poles (135g each) designed for mountain ultra racing.

$200 ★★★★★ 4.6

Petzl

NAO RL

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

$150 ★★★★★ 4.7
All gear guides →

Course Notes

A challenging 100K loop-type course starting at Willamette Pass Ski Area (70 miles east of Eugene, Oregon) at elevation 5120′, climbing up several mountains before returning to the ski area.

Similar races

Other 100K trail ultras, closest in distance first.