Waldo 100K Trail Run

Race completed

100 km Distance

3,350 m Climbing

10.0 Grit · Elite / extreme

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 214 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

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	100km	131	Anthony Fagundes · 09:29:31	Jennifer Schmidt · 10:46:07
2025	100km	135	Mario Mendoza Jr. · 09:59:31	Missy Lotz · 12:28:11
2024	100km	95	Casey Weinman · 10:18:31	Molly Schmelzle · 12:04:48
2023	100km	102	Rob Russell · 10:49:04	Marci Klimek · 10:21:04
2022	100km	103	Colton Gale · 09:33:53	Jessie Goodell · 12:21:44
2021	100km	90	Matt Palilla · 09:31:16	Megan Myers · 11:46:40
2019	100km	114	Drew Macomber · 10:03:32	Janessa Taylor · 11:22:53
2018	100km	100	Duncan Hoge · 10:15:00	Rachel Drake · 11:42:19
2017	100km	109	Colton Gale · 10:01:05	Camelia Mayfield · 10:47:56
2016	100km	80	Tyler Green · 10:38:30	Callie Cooper · 11:53:44

The field has held steady: 135 in 2025, 131 in 2026. 27% of the 2026 field were women.

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.

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 Shoes 34 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 3,350 m of ascent to walk up.
Headlamps A 16 h limit puts you out there after dark.

Adidas

Terrex Agravic Speed Ultra

RunRepeat found the Adidas Terrex Agravic Speed Ultra to be perfect for midfoot and forefoot strikers, while iRunFar noted that the shoe feels incredibly effici…

★★★★★ 4.5

Asics