UpaDowna Climb Nights - 6-8 p.m., second Tuesday, CityRock, 21 N. Nevada Ave., free. Registration: upadowna.org/programs.
Pizzeria Rustica Cycling Club - 2 p.m. second Sundays, Pizzeria Rustica, 2527 W. Colorado Ave.; pizzeriarustica.com.
Garden of the Gods Visitor and Nature Center - 1805 N. 30th St., free; 219-0104. - Get Fit in the Garden Wellness Walk, 9 a.m. Wednesdays. Registration required.
Mueller State Park - 21045 Colorado 67, Divide. Day pass $7 per vehicle; 687-2366. - Cahill Pond, 9:15 a.m. Friday, Grouse Mountain Trailhead. - Homestead, 9:15 a.m. Sunday, Homestead Trail. - Osborn Trail, 1 p.m. Sunday, Black Bear Trailhead.
Cheyenne Mountain State Park - 410 JL Ranch Heights Road. Day pass $7 per vehicle. Reservations: 576-2016. - Bird Hike, 8-9 a.m. Tuesday and May 22.
Columbine Classic Reining Horse Show - 8 a.m., Colorado State Fairgrounds, Horse Show Arena, 1001 Beulah Ave., Pueblo; thecolumbineclassic.com.
Gaited Training Clinic - With Nicole Carswell Tolle, 9 a.m.-5 p.m., Clear Springs Ranch, Fountain, $450-$550. Registration: Nicole, 553-7283, email@example.com.
Rocky Mountain Conservancy Field Institute - 1895 Fall River Road, Estes Park. Registration: rmconservancy.org. - Life as an Owl, 2-10 p.m. Saturday, $25.
Bear Creek Nature Center - 245 Bear Creek Road. Registration: 520-6387. - Aiken Audubon Monthly Program: 6:30 p.m. social, 7 p.m. program, Wednesday, free.
Sunrise nature/wildlife photo shoot - Saturday mornings, Westcliffe, $55. Reservations: 1-303-823-6399, kennethwajda.com/naturewildlife/.
Youth Fishing Day - For ages 5-15, 9:30 a.m.-noon, Willow Springs Ponds, Fountain Creek Regional Park, free; 520-6977, elpasocountynaturecenters.com.
Achilles International Pikes Peak Running Club - A nonprofit organization that uses the power of running to bring hope, inspiration and the joys of achievement to people with disabilities, 6:15 p.m. meet up and sign in; 6:30-7:30 p.m. run, walk or wheel, Mondays, Colorado Running Co., University Village Center, 5262 N. Nevada Ave., Suite 140; Laura, 331-1011.
Mountain Post Running Club - 5K or 10K, 4-6 p.m. Wednesdays, Main PX, 6220 Martinez St., Fort Carson, free. Children, strollers and pets welcome; Kris Spiller, firstname.lastname@example.org.
Colorado Springs Running Club - 7:30 a.m. Fridays and Saturdays, 6 p.m. Wednesdays. 45- to 60-minute runs, free; 635-3833.
Pikes Peak Road Runners - Cost and registration: pprrun.org. - NORAD Trail Races, 7 a.m. Sunday, Cheyenne Mountain State Park. - Kokopelli Kids Trail Running Series, 2 p.m. Sunday, Bear Creek Park East.
Run to the Shrine - To benefit Cheyenne Mountain Zoo, 7:30-11 a.m., Cheyenne Mountain Zoo, 4250 Cheyenne Mountain Zoo Road, $30-$55. Registration: cmzoo.org/run.
Nature and Raptor Center of Pueblo - Volunteer docent program, 5200 Nature Center Road, Pueblo. Registration: 549-2414.
Bear Creek and Fountain Creek nature centers - Needs volunteers to help with environmental education programs and visitor information services; Paula Megorden, 520-6387, email@example.com.
Listings are published on a space-available basis. Send information at least two weeks in advance: Email firstname.lastname@example.org.