Central Coast Concerned Mountain Bikers (CCCMB) organizes trail work days at which hundreds of community members work together to build and maintain local mountain biking trails.

From CCCMB.org:

"The mission of the Central Coast Concerned Mountain Bikers (CCCMB) is to expand the network of sustainable and enjoyable trails in SLO County and to maintain the trails currently in use. Since 1987, we have worked with California State Parks, the National Forest Service, San Luis Obispo City, and San Luis Obispo County in designing and building new trails and in maintaining existing ones. "

Visit the CCCMB website for trail work events, info, and more.