This Saturday, hundreds of people will be joining teams to ride relay laps on mountain bikes at Laguna Seca for 24 hours straight. As nutty as that sounds, those are the more moderate riders in the race known as 24 Hours of Adrenalin.

There are the soloists: riders on a longer dirt course who spend virtually all of the time from noon on Saturday until noon on Sunday on their bike. Bathroom and food breaks are limited.

One soloist in particular has been a crowd favorite for years, and took the title at last year’s event. This year he’s not coming. David “Tinker” Juarez, 44-year-old US Olympian and mountain bike hall-of-famer, has conquered the National Championships solo category seven times already, so maybe he’s got nothing left to prove.

The field is wide open now for someone else to match or surpass Tinker’s feat last year: 20 laps around the 12+ mile soloist course. That’s more than 240 miles up and down insane hills in 24 hours.

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