Thursday

Boulder Cycling Club Thursday evening rides: Join BCC for Thursday evening road or gravel rides; 5:30 p.m. Thursday, Full Cycle’s The Tune-Up Tavern & Espresso, 2355 30th St., Boulder; free; bouldercyclingclub.org.

Boulder Tuesday Thursday Hikers: Join outdoor enthusiasts for a day hike with this leaderless, rule-following drop-in group that breaks into smaller groups and carpools to various trailheads. Drivers are reimbursed for expenses. Bring a lunch, water and snacks, and be prepared for all weather conditions; 9 a.m. Thursday, North Boulder Park, Seventh and Dellwood, Boulder; free; 303-910-9944.

Saturday

Boulder Cycling Club Saturday morning rides: Saturday mornings at Sanitas are for road biking. Start times vary throughout the season, moving earlier as weather warms up and rides get longer; 9:30 a.m. Saturday, Sanitas Brewing Co., 3550 Fontier Ave., Unit A, Boulder; free; bouldercyclingclub.org.

Sunday

Boulder Cycling Club Sunday morning rides: Discover new routes and new friends on a spirited Sunday morning ride that places fun over competition. Plus, participants gets a free post-ride coffee courtesy of ModBoulder; 10 a.m. Sunday, Foothills Community Park, 800 Cherry Ave., Boulder; free; bouldercyclingclub.org.

The Diabetes Link 5K run/walk: Join The Diabetes Link at CU Boulder to run/walk for type 1 diabetes research alongside the JDRF and the Children’s Diabetes Foundation; 8 a.m. Sunday, The VAC Plaza at CU Boulder, 1085 18th St., Boulder; eventbrite.com.

Right Here, Right Now Climate 5K and Kids 1K: Participate in this 5K to raise awareness and funds for the victims of the Dec. 30, 2021 Marshall Fire in Boulder County; 9 a.m. Sunday, Steinbaugh Pavilion, 824 Front St., Louisville; $10-$45; 720-532-5549.

Spring Fling Prairie Dog Half Marathon, 10K and 5K race: The Spring Fling Prairie Dog Half Marathon, 10K and 5K race course winds along Ralston Creek trail, starting and ending at the Apex Recreation Center in Arvada. Half Marathon Distance finishers receive a finisher’s medal. All distance finishers receive age group awards, free photos and course support; 8 a.m. Sunday, Apex Recreation Center, 13150 W. 72nd Ave., Arvada; 909-227-0714.

Tuesday

Boulder Cycling Club Tuesday evening rides: Get out on the road or dirt in this club that welcomes cyclists of nearly all skill levels; 5:30 p.m. Tuesday, Twisted Pine Brewing Co., 3201 Walnut St., Boulder; free; bouldercyclingclub.org.