Sombrero Marsh Environmental Education Center and Thorne Administrative Offices, Boulder

1466 N. 63rd Street
Boulder, CO 80303

CLICK HERE for map to Sombrero Marsh Environmental Education Center.

Directions from Boulder: Head east on Arapahoe Ave. Turn right/south on 63rd Street. Ignore the “no outlet” signs. After a short distance the road will turn left/east and there will be a fence on your right beyond which you can see Sombrero Marsh. Continue driving until you see a set of gas pumps on your left. Once you reach the gas pumps, look to the right and you will see the Sombrero Marsh Environmental Education Center beyond the fence. The Center is easy to identify by its wind turbine and the solar panels mounted on the roof. Please park along the fence and enter the Center on foot at the opening in the fence marked by a large Thorne Nature Experience sign.

If you are riding the bus from Boulder, CLICK HERE for the RTD “Jump” bus schedule. The Jump travels east and west on Arapahoe and there is a stop at 63rd St. Get off at the 63rd St. stop and walk east on Arapahoe to 63rd St. Turn right on 63rd St. and walk south past the storage building on your left and the mobile homes on your right. Continue with directions above.

Directions from Denver: Take I-25 North to US-36 West. Take the Foothills/S. Boulder Road Exit and veer left onto Foothills Highway and take this to the intersection at Arapahoe Ave. Turn right/east onto Arapahoe Ave and take this to the traffic light at 63rd St. Turn right/south on 63rd St. Continue with directions above.

The Kassler Center, Littleton

Littleton, CO 80125

CLICK HERE for a map to the Kassler Center.

Directions: Exit C470 onto S. Wadsworth Blvd./Highway 121, which becomes S. Platte Canyon Rd. Drive South past the US Army Corps of Engineers Visitor Center, the entrance to Chatfield State Park, and Chatfield Reservoir. After 4.3 miles, bear left following signs for Waterton Canyon and Denver Water’s Kassler Center. Go another .3 miles and turn right into the Kassler Center property. Thorne programs are operated out of the first building on the right. PLEASE NOTE: Only drop-off and pick-up temporary parking is allowed at the Kassler Center. If you plan to visit the center for a longer period of time or take a hike on nearby trails, we recommend parking in the lot that is across the street and North of the Kassler Center.