Sierra Singles Group inviting single Coloradans of all ages to meet new friends while hiking, biking, camping, learning and exploring Colorado's natural beauty. Sponsored by the Pikes Peak Sierra Club. For details or to sign up for an outing, call Martha Rosenau, 685-9147. On June 2: Newlin Creek hike. On June 8: Intemann Memorial Trail. On June 9: Columbine Trail. On June 15-16: Car camping.
Wildflower Walk in Black Forest Regional Park. Reservations required, 520-6745. Sat., June 1, 9 a.m.
Guided Hikes at Mountain Park Environmental Center, Beulah. Hikes are guided by an experienced naturalist. Most are appropriate for ages 10 and up and last 2 to 3 hours. Come prepared for the weather, wear good shoes and bring water. $3, or free to members. Register early, group size limited. 719/485-4444. On Sat., June 1, 9 a.m.: Wildflower hike with Dr. Neal Osborn. On Sat., June 15, 8 a.m.
Natural History Hikes at the Catamount Institute in Woodland Park. On the first Saturday of each month from 9 a.m. to noon. Bring water and wear appropriate clothing. $3-$6. Pre-registration required, 687-1993. Next hike: June 1 with Steve Jennings, Geography & Environmental Studies Dept. Chair at UCCS.
American Heart Walk featuring Jared of Subway fame in Cheyenne Canon to Seven Falls and back. Also features a heart festival. Leashed pets okay. For details, call 635-7688. Sat., June 8, 8:30 a.m.
Colorado Open/USA Pentathalon National Championship at the Penrose Equestrian Center, Olympic Training Center and Bear Creek Park. For details, call 526-3908. Men's competition: Sat., June 8, 8 a.m. to 7 p.m. Sun., June 9, 8 a.m. to 7 p.m.
Bike by the Full Moon along the Santa Fe Trail to Palmer Lake. Reservations required, 520-6387. Fri., June 21, 8:30 p.m.
Night Programs at the Garden of the Gods. Free, 219-0108. On Tuesdays at 7 p.m.: Bat Walks. RSVP to 219-0108, space limited. On Wednesdays: Prairie Falcon Walks.