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Quicksilver Endurance Runs - 100k & 50k

The 2021 Quicksilver 100K AND 50K Endurance Runs are planned for Oct 23, 2021

Registrations are closed, list of entrants here.

Live tracking here

Click HERE to download the 2021 QSER Runner's Guide with all the important information about the race.  

The two courses will be the same that we've used since 2016, except for the finish location at Hacienda instead of Mockingbird (you will go right at Capehorn and run down 1.3 miles to Hacienda, total distance is the same).

The Quicksilver Endurance Runs are USA Track & Field-sanctioned events. The 100K is part of the USATF Pacific Mountain-Ultra-Trail Grand Prix.

The Quicksilver 100K race is a Western States 100 Mile Endurance Run qualifier. Both races are a UTMB qualifier (4 points for the 100K and new this year: 2 points for the 50K).


The 100K:

  • 4:30 am start

  • 13,000+ feet of elevation gain

  • Western States 100 qualifying race

  • 17-hour time limit (16-hour time limit for Western States 100 qualification)

  • 4 points towards qualifying for the UTMB races

  • PA/USATF MUT Grand Prix event

The 50K:

  • 7:00am start

  • 6,000+  feet of elevation gain

  • 4:00pm cutoff at mile 22

  • 2 points towards qualifying for the UTMB races

Plus, great swag and post-race party (although likely simpler this year).

Please check out this fantastic video about the 2015 Quicksilver 100K that was created by The Ginger Runner:

Quicksilver Running Club of San Jose is a 501(c) (4) nonĀ­profit tax exempt organization

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