The 2027 Quicksilver 100k and 50k will be held on May 8, 2027!
Registration opens Saturday, November 14, 2026, at 12 AM PT.
Quick Facts:
The 100K:
4:30 am start
13,000+ feet of elevation gain
All official 100k finishers within 17 hour time limit qualify for the Western States 100 lottery!
The Quicksilver Endurance Runs are USA Track & Field-sanctioned events. The 100K is part of the USATF Pacific Mountain-Ultra-Trail Grand Prix.
The 50K:
7:00am start
6,000+ feet of elevation gain
4:30pm cutoff at mile 22
Plus, great swag and post-race party.
Race Summary:
100K
Start time - 4:30 am from the Hacienda entrance of the Almaden Quicksilver County Park. You are required to have a light source to start. You can drop off your headlamp in the collection box at the Wood Road A/S and it will be returned to the finish where you, your pacer, or crew can retrieve it. Please label with your name.
Distance – 62 Miles
Elevation gain – 13,000+
Time Limit – 17 hours (All official finishers qualify for the Western States 100M lottery.)
It is recommended that you print this one pager and carry it with you so you have easy access to the aid station chart, cut-off times, and map on race day.
50K
Start time - 7:00am
Distance – 30.3 Miles
Elevation gain – 6,000+ ft
Cutoff– 4:30pm at mile 22
It is recommended that you print this one-pager and carry it with you so you have easy access to the aid station chart, cut-off times, and map on race day.
Volunteers
This race would not be possible without the support of 100+ volunteers every year. From bib pick up and parking lot attendants to aid station volunteers, sweeps, course marking, and much, much more, the volunteers at Quicksilver Endurance Runs are the lifeblood of the race and make the event a memorable and positive experience for our runners.
Volunteer registration opens soon! Stay tuned
Race Results
All race results can be found on Ultrasignup.com.
Race Recaps
Sponsors
We are privileged to receive support in the form of donations, discounts, and assistance from the companies and organizations listed below. Please help us show our gratitude by supporting them in return.
Benefactors
To date, from all our races, we have donated over $100,000 to numerous organizations and charities.
Video
Please check out this fantastic video about the 2015 Quicksilver 100K that was created by The Ginger Runner: