THURSDAY, JULY 11
A Climbing Ranger’s Guide to Hiking Longs Peak. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
Hike at Sunset — Mud Like Open Space. Boulder, 303-678-6214.
Madeleine Sorkin, big wall free climber — Talking on big walls in Yosemite, Kyrgyzstan and Patagonia. 7 p.m. Neptune Mountaineering, 633 South Broadway, Boulder, 303-499-8866.
SATURDAY, JULY 13
Roger’s River Run 5K Run/Walk — In honor of Roger Jones. 7:30 a.m. race start. Boston Avenue east of Hover Street, Longmont, www.ci.longmont.co.us/rotr/.
SUNDAY, JULY 14
Boulder Peak Triathlon — 1.5K swim, 42K bike, 10K run. 7:05 a.m. race start. Boulder Reservoir, 5565 N. 51st St., Boulder, www.bouldertriseries.com.
TUESDAY, JULY 16
Muddy Buddy Basics. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
WEDNESDAY, JULY 17
Backpacker Gear and Go Tour. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
Newcomers’ Hike to a Flatiron — With OSMP naturalist. 5:30 p.m. Chautauqua Ranger Cottage, 900 Baseline Road, Boulder, www.naturehikes.org.