THURSDAY, MAY 16
Lucky Mile Race Series — Superhero Night. 6:30 p.m. Elm Street and County Road, Louisville, www.luckymile.com.
Stone Master Event: A Past and Present Photographic Essay. 7 p.m. Neptune Mountaineering, 633 South Broadway, Boulder, 303-499-8866.
Top 10 Mountain Bike Rides in Colorado — With Dan Hickstein. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
SATURDAY, MAY 18
Boulder Community Cleanup Day — Boulder’s parks and greenways. 8:30 a.m. Various locations in Boulder. Register at www.BoulderParks-Rec.org or 303-413-7245.
Discover the LoBo Trail — Ride to Longmont on the Longmont-Boulder regional trail and bus back. 12 p.m. Community Cycles, 2805 Wilderness Pl., Ste. 1000, Boulder, 720-565-6019.
Do-It-Yourself Panniers. 9 a.m. Community Cycles, 2805 Wilderness Pl., Ste. 1000, Boulder, 720-565-6019.
Fly Fishing Classes — Level one class, free. 9 a.m. The Orvis Company, 629B S. Broadway, Boulder, 303-554-0122.
National Kids to Parks Day — Hiking as a Family with City of Boulder naturalists. 10 a.m. Chautauqua Ranger Cottage, 900 Baseline Road, Boulder, www.naturehikes.org.
Wildflowers of Rabbit Mountain Hike — A moderate two-mile hike from grassland to ponderosa pine and mountain mahogany shrubland. 10 a.m. Rabbit Mountain Open Space, between Longmont and Lyons, 303-678-6214.
SUNDAY, MAY 19
Boulder Bicycle Swap. 10 a.m. – 4 p.m. Fat Kitty Cycles, 3380 Arapahoe Ave., Boulder, www.boulderbicycleswap.com.
Colfax Marathon. 6 a.m. Denver’s City Park, East side of Ferril Lake, Denver, www.coloradocolfaxmarathon.org.
Crafts and Trades of Olden Days. 10 a.m. Agricultural Heritage Center, 8348 Ute Highway 66, Longmont, 303-678-8688.
TUESDAY, MAY 21
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.
Explore the Arctic of Northern Alaska. 7 p.m. Changes in Latitude Travel Store, 2525 Arapahoe Ave., Boulder, 303-786-8406.
To list your event, send information to: email@example.com. attn: “Adventure.”