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Quicksilver Endurance Runs - 100k & 50k

The 2023 Quicksilver 100K AND 50K Endurance Runs will be held on Saturday, May 13, 2023.

You can register here starting on November 12th.

Click Here to download the 2022 QSER Runner's Guide with all the important information about the race.  

The two courses will be the same as 2021 and similar to what we've used since 2016, except for the finish location at Hacienda instead of Mockingbird (you will go right at Capehorn Pass and run downhill 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.


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)

  • PA/USATF MUT Grand Prix event

The 50K:

  • 7:00am start

  • 6,000+  feet of elevation gain

  • 4:00pm cutoff at mile 22

Plus, great swag and post-race party.

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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