San Jose, CA, United States · Thursday, December 31, 2026

Timed 24 hours

New Years One Day 24 Hour Run

106 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.

37.3394° N, 121.8950° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~28 Small. Long stretches with nobody in sight.

DUV results for the 2025 edition (24h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high 13°C

Night low 4°C

Rainfall Showers likely

Daylight 9 h 37 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 233 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

Gear for this race

Chosen for this trail race.

Trail Running ShoesCushioning on trail that is still there in the last quarter.
Race NutritionSelf-supported fuelling between aid stations.
Hydration VestsFlask capacity without the bounce.
HeadlampsA 24 h limit puts you out there after dark.
GPS WatchesBattery life first — an ultra outlasts most full-GPS modes.

Brooks

Cascadia 18

Versatile trail shoe with BioMoGo DNA cushioning and TrailTack rubber outsole.

$140 ★★★★★ 4.5

Salomon

Aero Glide 4 Grvl

$159.95 ★★★★★ 4.5

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Nathan

VaporKrar 12L

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

$170 ★★★★★ 4.6

Nitecore

UT32

Dual-beam trail running headlamp (1100 lumens) with spot and flood beams.

$100 ★★★★★ 4.5

Suunto

Vertical

Titanium GPS watch with solar charging, offline maps, and 140-hour GPS battery.

$630 ★★★★★ 4.5

All gear guides →

Course Notes

Each lap is 1.03 miles (USATF certificated No. CA23033TEB) around Cottonwood Lake in Hellyer Park along the asphalt path. The course is relatively flat.

Similar races

Other trail ultras of the same format.