Idaho Falls, Idaho, United States · Friday, January 8, 2027

Backyard

Dizzy Horse A Winter Backyard Ultra

100 days away

not publishedn/a Distance

not publishedn/a Climbing

not publishedn/a Grit

We hold no course length for this race — a timed or backyard event is measured by the clock, not the kilometre — so there is no Grit score to give you.

43.4888° N, 112.0363° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~69 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (26h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, January

Daytime high -2°C

Night low -12°C

Rainfall Mostly dry

Daylight 9 h 07 m of light

Regional 2001-2020 average for January — NASA POWER, grid elevation 1673 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	26h	69	Stephen Stohl · 167.650 km	Sylvia Greer · 174.356 km
2024	20h	55	Stephen Stohl · 134.120 km	Sylvia Greer · 127.414 km
2023	37h	30	Jeremy Smith · 248.122 km	Cris Walters · 93.884 km
2022	19h	21	Zachary van Abbema · 127.414 km	Cris Walters · 93.884 km

The field grew 25% between 2024 (55) and 2025 (69). 19% of the 2025 field were women.

DUV results for the 2025 edition (26h) — ranked runners 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

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for this trail race.

Trail Running Shoes Cushioning on trail that is still there in the last quarter.
Race Nutrition Self-supported fuelling between aid stations.
Hydration Vests Flask capacity without the bounce.
Headlamps A 26 h limit puts you out there after dark.
GPS Watches Battery life first — an ultra outlasts most full-GPS modes.