MARIN COUNTY (KCBS) – Mountain bikers in Marin County want more access to trails where they are currently prohibited.

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Cycling advocates say riders have complete access in places like Sonoma and Santa Cruz, but not in Marin County. They have organized a group with a goal to get local agencies to free up more trails for biking.

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Some environmentalists said it’s not a good idea due to impact on the actual trails and wildlife in the areas.

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Mountain bikes are allowed on fire trails, but cyclists said that is only 9 percent of county lands, when they represent 40 percent of open-space visitors.