Fourmile Canyon Drive and Gold Run Road closed to cyclists starting April 28

UPDATE: Fourmile Canyon Drive and Gold Run Road closed to cyclists starting April 28 Lefthand Canyon Drive to reopen to cyclist Thursday, May 1

Boulder County, Colo. – As flood hazard mitigation crews wrap up work in Lefthand Canyon, high hazard zone mitigation operations are now moving into Fourmile Canyon. To help accommodate crews and create safe work zones, Boulder County is restricting cycling on Fourmile Canyon and Gold Run roads, starting at Boulder Canyon Drive. This closure begins Monday, April 28 and is expected to last until mid- to late-May.

Lefthand Canyon Drive is still expected to reopen to cyclists on Thursday, May 1; however, in order to accommodate ongoing work in James Canyon and Jamestown, cyclists are encouraged to avoid the area as large trucks and heavy machinery continue to work on repair and recovery operations.

In order to expedite the remediation of high hazard areas along Fourmile Creek, Boulder County is asking cyclists to respect the temporary restrictions. Motorists are also asked to avoid the area unless travel is necessary.

“We know how important cycling is to Boulder County residents and visitors, which is why we’re trying to get these areas open as soon as possible,” said Transportation Director George Gerstle. “I’d like to personally thank the cycling community for their continued patience and understanding while we work to make these areas safe for everyone.”

Residents who need to ride a bike in this area for basic transportation purposes can contact the Boulder County Sheriff’s Office at 303-441-3650 for a permit.

For more information on this work, contact Andrew Barth, Transportation Department communications specialist, at –

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No signage

I rode up there on the 29th without knowing it was closed. No signage at fourmile and canyon. Then I just saw this article today. Oops! I did notice the high amount of large trucks but that's kind of the new normal in canyons around here.