San Jose, CA, United States · Saturday, May 9, 2026

Fixed Distance 100K

Quicksilver 100 km Endurance Run

Race completed

100 km Distance

not publishedn/a Climbing

5.0 est Grit · Challenging

Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.

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

What the course asks

Time limit 17 hours 10:12 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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 100K. Measured against 214 races of the same distance. Cut-off calculator →

Field size ~179 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, May

Daytime high 21°C

Night low 8°C

Rainfall Dry — rain unlikely

Daylight 13 h 58 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 233 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	100km	179	Robert Schtz · 09:32:14	Sylvie Abel · 09:25:41
2025	100km	128	Steven Kool · 08:44:51	Amanda Wiggenhorn · 11:44:28
2024	100km	121	Steven Kool · 09:06:29	Teresa Kaiser · 11:35:35
2023	100km	99	Steven Kool · 09:27:48	Jaclyn Foroughi · 13:14:06
2022	100km	114	Matthew Seidel · 09:07:37	Jaclyn Foroughi · 12:20:56
2021	100km	133	Ryan Ung · 10:07:02	Sylvie Abel · 11:22:54
2019	100km	148	Ryan Montgomery · 09:32:44	Zhanna Ivashchanka · 12:11:59
2018	100km	166	Ben Eysenbach · 09:53:20	Cat Bradley · 11:15:00
2017	100km	158	Dominick Layfield · 09:48:30	Mandie Holmes · 11:23:52
2016	100km	165	Paul Terranova · 09:17:52	Kristin (Krissy) Moehl · 11:02:07

The field grew 40% between 2025 (128) and 2026 (179). 21% 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

👟 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.

Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Flask capacity for 100 km, without the bounce.
Headlamps A 17 h limit puts you out there after dark.
Accessories Chafe and blisters end more 100 km races than fitness does.

Salomon

Aero Glide 4 Grvl

$159.95 ★★★★★ 4.5

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

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

Petzl

NAO RL

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

$150 ★★★★★ 4.7

Buff

CoolNet UV+ Multifunctional

UPF 50+ neck gaiter with cooling technology. Desert and sun essential.

$25 ★★★★★ 4.5

All gear guides →

Overview

The Quicksilver 100 km Endurance Run, organized by the Quicksilver Running Club, takes place in San Jose, CA, each May. With 179 finishers in its latest edition, this race offers a larger field than 86% of 319 comparable 100k races.

Runners have 17 hours to complete the 100 km course, requiring a pace tighter than 47% of 215 peer 100k races. This translates to an average pace of 10.2 minutes per kilometer, leaving less margin than many comparable events. The course uses scenic, hilly single track trails and fire roads within Almaden Quicksilver Park.

Similar races

Other 100K trail ultras, closest in distance first.