THURSDAY, APRIL 25
Advanced GPS Class: Using Computers and Maps. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
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.
Explore the Arctic of Northern Alaska — With Stan and Margaret Havlick. 8 p.m. Neptune Mountaineering, 633 South Broadway, Boulder, 303-499-8866.
SATURDAY, APRIL 27
Creek Hike With Service Animals. 9 a.m. East Boulder Recreation Center, 5660 Sioux Dr., Boulder, www.naturehikes.org.
The Distance Classic — 5K or 15K. 7 a.m. registration and bib pick-up. Boulder Reservoir, 5565 N. 51st St., Boulder, www.distanceclassic.com.
Fly Fishing Classes — free. 9 a.m. The Orvis Company, 629B S. Broadway, Boulder, 303-554-0122.
Tree Squirrels of Boulder County. 10 a.m. Heil Valley Ranch Open Space, on Geer Canyon Road off Left Hand Canyon Drive, Boulder County, 303-678-6214.
MONDAY, APRIL 29
Kid-to-Kid, Climbing 14ers — With Max Manson, 12-year-old who has climbed 49 Colorado 14ers. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
TUESDAY, APRIL 30
Camp Cooking Basics. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
I Spy Beaks and Feet — For preschool children and their families. 10 a.m. Pella Crossing Open Space, 1 mile south of Hygiene on North 75th Street, 303-678-6214.
Packing Light Clinic. 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.”