Muddy Trail Closures
Muddy Text Alerts
Text “OSMP” to 888-777 to sign up for text updates about muddy trail closures.
Other Trail Closures and Advisories
Bluebell Road Closure
Bluebell Road from the Ranger Cottage to the Mesa Trail/Bluebell Road junction is closed due to a waterline break. Repairs will occur on this week and OSMP anticipates reopening the trail late Friday.
Doudy Draw Trail bridge closure beginning March 31
The bridge over Community Ditch on Doudy Draw Trail will be closed for maintenance work beginning as soon as Monday, March 31. The bridge will be closed 24/7 through Friday, April 4. The Doudy Draw Trail will remain open but visitors will not be able to cross the bridge. Visitors may access the first 1/3-mile of Doudy Draw Trail and Community Ditch Trail from Doudy Draw Trailhead. Visitors may access the Springbrook area from Flatirons Vista Trailhead.
Chapman Drive Trailhead and Boulder Canyon Trail closures beginning March 3
OSMP will need to close a recently constructed underpass that connects the Boulder Canyon Trail to the Chapman Drive Trailhead for approximately three months to install the new bridge, weather permitting. A closure at the Chapman Drive Trailhead to complete trailhead improvements is expected to extend further in the summer. View a map of the closure area below.
However, the Chapman Drive Trail and the existing vehicle bridge from the highway and Chapman Drive Trail to the west will remain open throughout the project. Boulder Canyon Trail – except for the underpass near Chapman Drive Trailhead, which will be closed this spring to install a new bridge – also will remain open. View a map.
Sawhill Ponds Trailhead closure beginning March 3
The Sawhill Ponds Trailhead will be closed March 3 through the end of 2025, weather permitting, while OSMP completes major trailhead improvements. Visitors can access the Sawhill Ponds Trail during the trailhead closure through the Walden Ponds Wildlife Habitat trailhead and the Walden Ponds Trail to the north. Walden Ponds is managed by Boulder County Parks & Open Space and subject to county regulations. View more on the Sawhill Ponds Trailhead Project page.
Boulder Falls Trail closed effective November 12
The Boulder Falls area in Boulder Canyon is temporarily closed after a rockslide damaged the trail and infrastructure that keeps rocks and sediment from falling on the trail. There is no estimated timeline for when the area may reopen and more information will be provided once an assessment is completed. Climbers who access Dream Canyon through Boulder Falls should take alternate routes, such as Sugarloaf Road.
Marshall Mesa Trailhead closure
OSMP closed the Marshall Mesa Trailhead to support state coal mine mitigation work and conduct extensive trailhead improvements. The trailhead will likely be closed for one year. During the Marshall Mesa trailhead closure, visitors can access most of the Marshall Mesa trails. Bicyclists also will be able to complete the full "Dirty Bismark" loop. View maps and learn more on the project page.
Flagstaff Summit Road closed to vehicles
The summit road is closed to vehicles until May. Visitors may still access the area on foot. The closest open trailhead is Realization Point.
Boulder Star Area closure
The City of Boulder reminds everyone to view the Boulder Star from afar as it remains closed. No designated trail currently leads to the Boulder Star. Learn more about viewing the Boulder Star from afar.
Creek closures to limit spread of invasive mudsnails
The City of Boulder has closed access to South Boulder Creek at the South Mesa Trailhead to prevent the spread of a highly invasive aquatic species, New Zealand Mudsnails (NZMS). The South Mesa Trailhead and the Mesa Trail will remain open. Learn more about the NZMS closures.
Rock Island 1 in Boulder Canyon closed
Rock Island 1 is closed. The rock fractured and part fell onto the Boulder Canyon Creek path. Sections of the remaining rock have been evaluated as unstable so it is closed until recommended bolting can be completed.