West Side Mountain Bike Series


West Side Mountain Bike Series

Washington's Premier Cross Country Bike Series!!

QUESTIONS about events, the series, registration whatever, should now be directed to Bell Lap Production, llc at Hello@BellLapProductions.com or (206) 659-9465.

BuDu Racing, LLC began promoting the West Side Mountain Bike Series in 2006 with just four events at South Seatac Park. The next year we added the Black Diamond Trails and kept adding locations after that. WSMBS has always been early season, mainly because of the BuDu event and timing schedule during the summer. We hope that you will come enjoy local trails and fun people.

In 2022, Rory and Deanna announced their retirement and have handed over the West Side Mountain Bike Series to Michael Copenhaver and Ella Dorband, from Bell Lap Production, llc. We are very excited for the transition in 2023, but we will be at the events providing assistance to Bell Lap Production as they see fit. The series is transferring to very capable hands! 

Work Safe Access

Our title sponsor is Work Safe Access. Tom Anderson, from Work Safe Access, has been part of the West Side Mountain Bike Series for many years. He was part of the Fres Bar company that many of you fondly remember. At Work Safe Access, they design and manufacture ladders, stairs, railings, and platforms. They are the professionals you call to implement safe access throughout your property.

Kid Racer

Riders of All Ages

This series works to cater to all ages, and we include different categories from Age Groups, to Clydesdale, to Single Speed, to Fat Tire and Open categories in most of the Divisions. Junior riders (in Cat 3) normally have a modified course that is more user friendly for those ages. We give away awards three deep at each event. We also offer a World Dominator Team competition.

World Dominator Team Competition


See you out there!