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Quicksilver Endurance Runs - 100k & 50k

The 2021 Quicksilver 100K AND 50K Endurance Runs will take place on Saturday, May 8, 2021

The 2020 QSER Runner's Guide is available HERE to browse through the site menus.

Or, if you prefer to get the whole Runner's Guide in one big PDF, click HERE.


The 2020 race was cancelled due to COVID-19: 2020 registered runners can register on Ultrasignup between Nov 1st and Nov 8th, 2020. General registrations will open on Nov 9th and we will have a waitlist.

The two courses will be the same that we've used for the previous four years, and only slightly different than we used for the three years prior to that. We will have some great food and drinks for you after you finish, and the awesome celebratory atmosphere (Covid allowing) that you've come to expect from the Quicksilver Running Club.

The Quicksilver 100K race is a Western States 100 Mile Endurance Run qualifier as well as a UTMB qualifier (4 pts)!

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

  • PA/USATF Ultra 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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