THURSDAY, APRIL 24
Changing Landscapes: OSMP After the Floods — Hike the Upper McClintock Trail with a naturalist. 6:30 p.m. Grant and Baseline streets, Boulder, www.naturehikes.org.
Biking the Pacific Coast from Canada to Mexico. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303- 583-9970.
Hike for Seniors. 10 a.m. Walden Ponds, 75th Street between Valmont and Jay Road, Boulder, 303- 678-6214.
Spring Skiing Descents with Fritz Sperry. 8 p.m. Neptune Mountaineering, 633 South Broadway, Boulder, 303- 499-8866.
SATURDAY, APRIL 26
Wheel Truing Workshop. 9:30 a.m. Community Cycles, 2805 Wilderness Pl., Ste. 1000, Boulder, 720-565-6019.
The Mystery of Bird Migration Bird Walk. 8 a.m. Meeting location provided with registration, 303-678-6214.
SUNDAY, APRIL 27
The Amazing Rock the Earth Race. 8 a.m. Rock the Earth Denver’s office, 1536 Wynkoop St., Denver, http://rocktheearth.org.
bRUNch Boulder — 5k and 10K runs followed by brunch. 9:15 a.m. The Dushanbe Teahouse, 1770 13th St., Boulder, http:// brunchrunning.com.
Explore Flood Effects on Wildlife — An easy hike at Sawhill Ponds. 4:30 p.m. Sawhill Ponds, 75th Street off Valmong Road, Boulder, www.naturehikes. org.
Spring Heritage Day at Walker Ranch Homestead. 10 a.m. Walker Ranch Homestead, 8999 Flagstaff Road, Boulder, 303-776-8848.
TUESDAY, APRIL 29
6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
Biking in Belgium. 7 p.m. Changes in Latitude Travel Store, 2525 Arapahoe Ave., Boulder, 303-786-8406.
To list your event, send information to: firstname.lastname@example.org. attn: “Adventure.”