THURSDAY, APRIL 18
Dirty Thursday Road — Mountain and road biking with the Boulder Cycling Club. 6 p.m. Old Chicago, 100 Superior Plaza Way, Superior, www.bouldercyclingclub.org.
Montenegro and Croatia: Mountains and the Sea — With David Gerstel. 7 p.m. Neptune Mountaineering, 633 S. Broadway, Boulder, 303-499-8866.
Meet Boulder Food Rescue — A 10-mile ride to tour Boulder Food Rescue’s community partners. 10 a.m. West Parking lot of Sprouts, 2525 Arapahoe Ave., Boulder, www.communitycycles.org.
The Mystery of Bird Migration Bird Walk. 8 a.m. Walden Ponds Wildlife Habitat Area, N. 75th Street between Valmont Road and Jay Road, Boulder, 303-678-6214.
SUNDAY, APRIL 21
Earth Day 5K for the Center for ReSource Conservation. 10 a.m. Potts Field at CU Research Park, Boulder, www.conservationcenter.org.
Marsh Songs — An easy hike to listen for local birds. 8 a.m. Sawhill Ponds, 75th Street 0.6 miles north of Valmont Road, Boulder, www.naturehikes.org.
TUESDAY, APRIL 23
Dine and Dash Tuesday Evenings — With City of Boulder Parks and Recreation. 5 p.m. Boulder Reservoir, 5565 N. 51st St., Boulder, 303-413-7200.
WEDNESDAY, APRIL 24
Pedal East Boulder Paths. 6 p.m. Community Cycles, 2805 Wilderness Pl., Ste. 1000, Boulder, 720-565-6019.
To list your event, send information to: email@example.com. attn: “Adventure.”