Trail and Area Closures and Advisories
OSMP makes every attempt to keep this page as up to date as possible. However, some closures and trail advisories are made on an emergency basis for the safety and well-being of our visitors, wildlife and natural resources. Please watch for these signs during your visit. Descriptions of closures and links to more information, including maps, are below.
Trail Closures, Advisories and Fire Bans
Temporary trail closures, advisories and fire bans will be posted on this page; please check before your visit.
The majority of Open Space & Mountain Parks trails are open. Please respect closures for the remaining long-term trail repair projects.
Seasonal Raptor Closures
OSMP closes certain areas from Feb. 1 to July 31 every year to protect cliff-nesting raptors.
OSMP closes certain areas from March 15 to Oct. 31 every year to protect nesting burrowing owls.
Two areas on OSMP are closed from Nov. 1 to July 31 every year to protect bald eagle nesting and roosting activity.
OSMP closes part of the Axelson property from March 15 to Sept. 10 every year to protect nesting osprey.
Bat Roosting Site Closures
Some areas are permanently closed to prevent the spread of White-Nose Syndrome; other areas have seasonal closures to protect roosting bats.
New Zealand Mudsnail Closures
Dry Creek and Boulder Creek downstream of Valmont Road are closed year round because of the non-native, invasive New Zealand Mudsnail.
Grassland Ground Nesting Bird Closures
OSMP closes certain areas from May 1 to July 31 every year to protect grassland ground nesting birds.
Seasonal Leash Restrictions
Seasonal leash restrictions are in place from Aug. 15 to Nov. 1 every year in certain areas that are frequent foraging locations for bears.