THURSDAY, MAY 30
Long-distance ultra-light backpacker Andrew Skurka — Presented by the Colorado Mountain Club, proceeds benefit the Youth Education Program. 7 p.m. American Mountaineering Center, 710 10th St., Golden, 303-279-3080.
Exploring Colorado’s Backcountry Huts. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303- 583-9970.
Lucky Mile Race Series — Summer Dayz Night. 6:30 p.m. Elm Street and County Road, Louisville, www.luckymile.com.
FRIDAY, MAY 31
Underwearness — Drop Your Drawers and Run Wild 5K Run and Denver Zoo After Party. 6:30 p.m. Denver Zoo, City Park, Denver, www.prerace.com.
SATURDAY, JUNE 1
Fly Fishing Classes — Level two class, free. 9 a.m. The Orvis Company, 629B S. Broadway, Boulder, 303-554-0122.
GoRuck Challenge — A Special Operations-led team event for a 8- to 10-hour, 15- to 20-mile tour. 1 a.m. and 10 p.m. Chautauqua Park, 900 Baseline Road, Boulder, www.goruck.com.
Sunrise Triathlon — Olympic Triathlon, Sprint Triathlon, Duathlon and 5K run. 6 a.m. Boulder Reservoir, 5565 N. 51st St., Boulder, www.yourcausesports.org.
SUNDAY, JUNE 2
Jungle Birds of Boulder — Get to know migratory song birds from Costa Rica. 7:30 a.m. Bear Canyon trail, 1520 Bear Mountain Drive, Boulder, www.naturehikes.org.
TUESDAY, JUNE 4
How to Climb a 14er. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
How to Pack Light Clinic. 7 p.m. Changes in Latitude Travel Store, 2525 Arapahoe Ave., Boulder, 303-786-8406.
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