SUBMISSIONS: Send info 14 to 21 days in advance to OEcalendar@denverpost.com or send a fax to 303-866-9004 (attn: Outdoor Extremes). Include contact information. Items run on a space-available basis.
ADVENTURE RACING
May 8
Buena Vista Adventure Xstream; mountain biking, trail running, orienteering, kayaking (boats provided), ropes and more; divisions include sprint, 12- and 24-hour options; $125 to $195. or 970-259-7771
HIKING/BACKPACKING
Saturday
Serpents Trail Centennial Challenge; at Colorado National Monument; see how many trips up and down the historic Serpents Trail you can make in five hours in the Serpents Endurance Challenge; there also is a Serpents Tour leisure hike with kid-friendly activity stations; $25 adult and $10 youth (ages 12 and younger); 7 a.m.
or 970-858-3617 (ext. 360)
RUNNING
Saturday
• Wondergirl 5K; at Longs Park in Clifton, next to Central (Grand Junction) High School; female racers only; includes prizes and refreshments; proceeds benefit Girls on the Run program; $20; 9 a.m. or 970-257-9267
• Hawk Hustle 5K run and walk; at Horizon High School, 5321 E. 136th Ave. in Thornton; benefits the athletic programs at Horizon; 9 a.m. or 720-972-4400
TRAIL RUNNING
Saturday
Balarat Trail Run; 6-mile course starts at the Balarat Outdoor Education Center in Jamestown; includes 2-mile family fun hike, free barbecue and live bluegrass band; register at or download registration form at ; 10 a.m. 720-424-2940
