

Intrigue and demand grew for this new way to experience trails and the outdoors, gaining speed around the rest of the country and the world. This continual modification led Joe Breeze, Tom Ritchey, Gary Fisher, and Charlie Cunningham to build some of the first modern mountain bikes. Soon, people started to notice this new breed of bikes on the trails. Wende and Larry Cragg, members of VCT, are responsible for photographing these formative days on Mt. Tam. The film "Klunkerz," which featured much of the Craggs’ work, describes how mountain biking took off thanks to the "communal spirit" of the times: "The process of continual modification, each riffing off each other's innovations, was a critical factor in the evolution of the modern mountain bike."

This club also organized the first mountain bike race they called “Repack.” They found bikes in junkyards and ripped off the fenders, kickstands, chain guards, and tanks and called them “klunkers.” Tam.” Soon after, Velo Club Tamalpais (VCT) was riding bikes they modified with scavenged parts, including parts adapted from motorcycles. The Marin Museum of Bicycling outlines these early days, starting with a group of teenagers who “rode 1930s-40s vintage single-speed balloon tire bikes on Mt. The adrenaline-chasers who developed the sport here in the 1960s and 70s did not have a well-worn path to follow, and their pursuit to take bikes off-road was as determined as an ascent up the mountain itself. Riders tackling this off-road terrain must navigate over rocks, dips, and sharp bends along the way. Many of these trails are well-traveled by motivated cyclists from around the world. Mt. Tam is recognized by many as the birthplace of modern mountain biking and has become a cycling epicenter. A mountain bike ride on Mount Tamalpais usually starts with a steady climb up from a trailhead at its base.
