Woodside, CA, United States · Sunday, August 30, 2026

Fixed Distance 50K

Crystal Springs 50 km Summer Trail Run

Race completed

50 km Distance

not publishedn/a Climbing

2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

37.4299° N, 122.2539° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 9 hours 10:48 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 71% of 50K races. Measured against 1034 races of the same distance. Cut-off calculator →

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

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 18°C

Night low 13°C

Rainfall Dry — rain unlikely

Daylight 13 h 06 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 66 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	37	Casey Corman · 04:42:22	Michelle Lomeli · 06:44:22
2024	50km	35	Greg Miller · 04:21:17	Courtney Smith · 04:38:07
2023	50km	43	Oleksandr Skorokhod · 04:11:05	Kirsten Kanarr · 05:26:45
2022	50km	17	Greg Miller · 04:46:07	Mackenzie Walsh · 05:44:11
2021	50km	32	Joseph Owen · 04:07:44	Elena Makarevich · 04:16:31
2019	50km	32	Jordi Moncada Elias · 04:56:36	Cyndi Stainner · 05:40:47
2018	50km	33	John Lofthus · 04:24:14	Kimberly Perricelli · 06:05:25
2017	50km	47	Ben Eysenbach · 04:06:37	Sharon Yamauchi · 05:17:56
2016	50km	29	Rick Scott · 04:16:06	Kim Barger · 05:01:18
2015	50km	35	Tyler Hill · 04:19:37	Penelope MacPhail · 04:49:56

The field grew 6% between 2024 (35) and 2025 (37). 14% of the 2025 field were women.

DUV results for the 2025 edition (50km) — 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

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 50 km of trail.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

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

Tailwind

Endurance Fuel

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

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Suunto

Vertical

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

$630 ★★★★★ 4.5

All gear guides →

Overview

The Crystal Springs 50 km Summer Trail Run, organised by Coastal Trail Runs, takes place in Woodside, CA, in August. This 50 km trail race, with a 9-hour time limit, has been run 10 times since 2015, with the latest edition in 2025 seeing 37 finishers.

Runners face a cut-off tighter than 60% of 1022 peer 50k races, requiring a pace faster than 10.8 minutes per kilometer to complete the 50 km course. The race typically draws a field larger than 49% of 2663 comparable 50k events. The trails through Huddart Park, King's Mountain, and Bear Gulch offer towering redwoods and lush ferns.

Similar races

Other 50K trail ultras, closest in distance first.