Manitou Lake Volksmarch in Woodland Park with the Falcon Wanderers Volksmarch Club. 5K, 10K and 13K. Free, 392-1834. Sat., June 8, 8 a.m. to 1 p.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 15, 8 a.m.: South Creek hike.
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.