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.
The Joy Ride - Family-friendly 5-6 mile bike ride, meet between 5-6 p.m. Wednesdays, McCabe's Tavern, 520 S. Tejon St.; tinyurl.com/bzpmq8p.
Garden of the Gods Visitor and Nature Center sponsored hikes - 1805 N. 30th St., free; 219-0104. - Get Fit in the Garden Wellness Walk, 9 a.m. Wednesdays. Register in person.
Mueller State Park hikes - 21045 Colorado 67, Divide. Day pass $7 per vehicle; 687-2366. - Fall Challenge Hike, 8 a.m. Tuesday, Thursday and Saturday, call for meeting location.
Rocky Mountain Hiking Trails - With information on more than 70 hikes; rockymountainhikingtrails.com.
Nature programs at Mueller State Park - 21045 Colorado 67, Divide. Day pass $7/vehicle; 687-2366. - Eyes in the Dark, 7 p.m. Saturday, Amphitheater.
Nature programs at Fountain Creek Nature Center - 320 Peppergrass Lane, Fountain. Reservations: 520-6745. - 2's & 3's Outdoors - Batty Bats, for ages 2 and 3, 9-10:15 a.m. Thursday, $3.
Nature programs at Bear Creek Nature Center - 245 Bear Creek Road. Reservations: 520-6387. - Webelos Scout Day, 9 a.m.-3 p.m. Saturday, $4 per badge per scout.
Sunrise nature/wildlife photo shoot - Saturday mornings, Westcliffe, $55. Reservations: 1-303-823-6399, kennethwajda.com/naturewildlife/.
The Colorado Birding Trail website - Coloradobirdingtrail.com, information about places to observe birds and other wildlife.
Hutchinson Homestead Ranch and Learning Center Tours - Salida, $5, $3 for ages 8-16; 239-0955, hutchinsonhomestead.org.
Dig Day - Learn about archaeology, mining, geology and paleontology, 10 a.m.-2 p.m., Colorado Springs Pioneers Museum, 215 S. Tejon St., donations accepted; cspm.org.
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.
Pikes Peak Road Runners - Go online for information, cost and registration: pprrun.org. - Sage Burner, 7 a.m. Saturday, Gunnison. - Tiger Classic 5K, 8 a.m. Saturday, Monument Valley Park. - Fall Series II, 10:30 a.m. and Kids Fall Series II, noon, Sunday, Norris Penrose Event Center.
5K Survivor's Run - to benefit TESSA, 9 a.m., America the Beautiful Park, 126 Cimino Drive, $10-$45. Registration: tinyurl.com/yc6eahv5.
Bear Creek and Fountain Creek nature centers - Need volunteers for assisting with environmental education programs and visitor information services; Paula Megorden, 520-6387, email@example.com.
Colorado Springs Therapeutic Riding Center at The Mark Reyner Stables - Volunteers needed to help special needs children and adults during their equine-assisted therapy; 634-4173, cstrc.org.
Listings are published on a space-available basis. Send information at least two weeks in advance: Email firstname.lastname@example.org.