Pizzeria Rustica Cycling Club - 2 p.m. second Sundays, Pizzeria Rustica, 2527 W. Colorado Ave.; pizzeriarustica.com.
SATURDAY AND SUNDAY
Santa Fe Century - Christus St. Vincent Regional Medical Center, Santa Fe, N.M. Registration: santafecentury.com.
Mueller State Park hikes - 21045 Colorado 67, Divide. Day pass $7 per vehicle; 687-2366. - Fitness Hike, 9:15 a.m. Wednesday, Homestead Trailhead. - Elk Meadow Hike, 9 a.m. Thursday, Elk Meadow Trailhead. - Murphy's Cut to Bacon Rocks Hike, 9:15 a.m. Friday, Lost Pond Trailhead. - Artists' Photo and Scouting Hike, 9:30 a.m. Friday, Grouse Meadow Trailhead. - Buffalo Rock Hike, 1:30 p.m. Sunday, Grouse Mountain Trailhead. - Osborn Trail Hike, 9 a.m. May 22, Homestead Trail.
Hikes at Cheyenne Mountain State Park - 410 JL Ranch Heights Road. Day pass $7 per vehicle. Reservations: 576-2016. - Bird Hike, 7:30-9 a.m. Tuesdays, through June 6.
Rocky Mountain Hiking Trails - With information on more than 70 hikes; rockymountainhikingtrails.com.
Nature programs at Garden of the Gods Visitor and Nature Center - 1805 N. 30th St.; gardenofgods.com. - Wildlife of the Park, 11 a.m. Wednesdays, Exhibit Hall.
Nature programs at Cheyenne Mountain State Park - 410 JL Ranch Heights Road. Day pass $7 per vehicle; 576-2016. - Kids to Parks Day, 10 a.m.-2 p.m. Saturday.
Hutchinson Homestead Ranch and Learning Center Tours - Salida, $5, $3 for ages 8-16; 239-0955, hutchinsonhomestead.org.
Pikes Peak Birding and Nature Festival - Various local locations, go online for ticket prices and registration: pikespeakbirdingand naturefestival.org.
Mueller State Park programs - 21045 Colorado 67, Divide. Day pass $7 per vehicle; 687-2366, ext. 110. - Outdoor Skills Day, 10 a.m.-3 p.m. Saturday
SATURDAY AND SUNDAY
Fly-Fishing Rendezvous - Highlights the best of the Rocky Mountain's emerging fly brands, 8:30 a.m.-5 p.m., Jefferson County Colorado Fairgrounds, 15200 W. 6th St., Golden, $8-$10; flyfishing rendezvous.com.
Pikes Peak Road Runners - Go online for information, cost and registration: pprrun.org. - Valor Run, 9 a.m. Saturday, Memorial Park. - Run for Education and Kids Fun Run, 9 a.m. Saturday, Stetson Park. - Springtime in Monument 5K, 930 a.m. Saturday, Fox Run Park, Monument. - Womens Distance Festival 5K, 10 a.m. Saturday, North Monument Valley Park. - NORAD Trail Races, 7 a.m. Sunday, Cheyenne Mountain State Park.
Run to the Shrine - To benefit Cheyenne Mountain Zoo, 7:30 a.m., Cheyenne Mountain Zoo, 4250 Cheyenne Mountain Zoo Road, $30-$55. Registration: cmzoo.org/run.
Listings are published on a space-available basis. Email information at least two weeks in advance to email@example.com.