Climbing on OSMP

Open Space and Mountain Parks is a popular destination for climbers and boulderers alike. Comprised of sedimentary rock called the Fountain Formation, the Flatirons are synonymous with Boulder and the history of rock climbing in North America. The first recorded rock climb in Colorado occurred in Boulder in 1906 when the Third Flatiron was ascended. The area offers over 1,400 climbing opportunities ranging in difficulty from 5.7 to 5.14.

The Boulder Mountain backdrop supports one of the highest densities of cliff-nesting falcons and eagles in the entire Front Range of Colorado. To protect cliff-nesting raptors, OSMP implements seasonal area closures, which includes some popular climbing formations, from December 15 to July 31st every year, depending on the species. The closures are monitored for nesting activity by OSMP staff and volunteers and are adaptively managed. Closures could be lifted early or extended.

For the most current and up to date closure information, please visit the OSMP Climbing webmap.

Off-trail permits are required to access some climbing areas in Habitat Conservation Areas (HCAs).

We’re happy you’re here to enjoy the world-class climbing experiences for all levels that OSMP has to offer. But remember some key Leave No Trace Principles to minimize your footprint on the land.

Wag Bag Stations

Did you know the Boulder Climbing Community maintains 4 wag bag stations in the Flatirons? View a map of current wag bag stations. They are located at:

• The Dome/Elephant Buttress
• 3rd Flatiron/Satellite Boulders
• The Slab
• Der Zerkle

Pack it in/Pack it out

Climbing gear, including ropes, webbing, slings, and quickdraws may not be left unattended. Unattended gear and ropes may hinder other’s ability to climb or enjoy the natural scenery and may disturb wildlife. Climbers should refrain from leaving backpacks containing food unattended while they climb as this attracts bears.

Wildlife Observation

Climbers often observe unique wildlife activity, new raptor nests or bats in cracks in the rock. If you see something, please let us know by calling the front desk at 303-441-3440.

Since 2003, OSMP has maintained a memorandum of understanding (MOU) with the Flatirons Climbing Council (FCC) to put in place a program allowing for the placement of new, bolted routes, and the replacement of existing hardware.

Apply for a New Route

For information on how to apply for a new route, please visit the Flatirons Climbing Council Fixed Hardware Program. Applicants will be required to fill out an Application for New Bolted Route with a description of the route that includes: the approach (and if applicable, the descent), a description of existing routes, new route description with number of new bolts, area, cliff or rock face, staging area, and contact information.

Application deadlines are January 1, May 1, and August 1. Applicants are encouraged to submit applications well in advance of the due date. The FHRC makes application recommendations to OSMP, and OSMP makes the final decision on all applications.

View a list of formations contained in the MOU.

It is illegal to place fixed protection without a permit.

Replace an Unsafe Bolt

If you should come across what you determine to be an unsafe bolt and wish to replace it, please use the Application for Bolt Replacement Form. Should your request be approved, we thank you for wishing to make climbing safer for everyone!