Repack was the race that invented the sport. Twenty-four of them were run on an old dirt road west of Fairfax, twenty-two between 1976 and 1979, mostly in the autumn as the road season wound down, and a handful more into the early eighties. The course dropped 1,300 feet in under two and a half miles from a start line on Pine Mountain's east face, and it was ridden on modified 1930s Schwinn cruisers with coaster brakes. The name is a maintenance instruction: the descent got the hubs so hot that the grease inside vaporised, and after a run the hub had to be repacked. Gary Fisher's 4:22 still stands.
It ended by decision, not by fading. After the 1984 race, Marin County land and water managers made it clear that Repack, the race, could be no more.
What nobody wrote down is why. The Museum records the decision and notes it met little resistance, but not the reasoning behind it, no erosion report, no liability memo, no meeting minutes that survived. The most consequential race in the history of mountain biking was stopped for reasons that are now simply missing. That is the whole argument for this site, made forty years early: rides do not usually end with an announcement. They end, and then the reason evaporates like grease out of a coaster brake.