ADVENTURE RACING
Sept. 8
Vail Adventure Xstream Adventure Race; in Vail; sprint or 12-hour races; mountain bike, kayak, trek and navigate; $85 to $175.
or 970-259-7771
CYCLING
Mountain and road
Wednesday
Beaver Creek Blast Mountain Bike Race in Beaver Creek; by the Vail Recreation District.
Thursday
10th PowerAde Pinnacle Summer Race Series; weekly recreational racing series; 12 racing categories, beginner to expert; varying lengths and difficulty; on Crested Butte’s network of trails and singletrack; 5:45 p.m.
or 970-349-2221
Saturday
Escalante Days Mountain Bike Race; in San Juan National Forest, Boggy Draw Area near Dolores; 13- 21- and 35-mile courses for different classes; $10 to $25; 9:45 a.m.
Aug. 18-19
Fifth annual 24 Hours in the Sage; at Gunnison’s Hartman Rocks Multi-Use Recreation Area; a full-day relay; solo, duo teams and four- and five-person teams; men, women and coed; ride a 13-mile loop continuously from noon to noon; most laps wins; loop includes 14 trails, mostly singletrack with an 1,100-foot gain.
or 303-507-1148
HIKING/BACKPACKING
Saturday
Trail exploration class with the Boulder Parks and Recreation Department; discover local hiking trails with a certified fitness trainer; Saturdays through this week; 9-11 a.m.; a moderate workout with a warm-up and stretch before and after each hike; maps and hike descriptions provided.bouldercolorado.gov/parks-recreation/econnect or 303-413-7270
Sunday
Cooley Lake nature walk; at South Platte Park in Littleton; ages 5-adult; explore Cooley Lake wildlife area on a naturalist-guided walk; free. 303-730-1022
Sunday-Aug. 18
Learning your wildflowers hike with Colorado Trail Foundation; weeklong classes and hikes; near Lake City at the CTF Education Center.
Aug. 20
L2S hiking and backpacking training; one gym/classroom session and one hike weekly to improve endurance and prevent injury; learn the basics of packing, nutrition and safety; eight-week program: $360, or $15 per class, $30 per hike. L2S-livehealthy.com or 720-352-3638
Oct. 4-7
Introduction to Backpacking (canyons); near Grand Junction; the Women’s Wilderness Institute offers a course covering backpacking basics during a trip to Utah’s slickrock canyons; $495. 303-938-9191 or
.
KAYAKING/RAFTING
Sept. 1-3
Colorado River Canoe Trip; from Grand Junction to Westwater, Utah; with Bernie Kendall and Mike Willis from the White Water Canoe Co.; through Ruby and Horsethief canyons; no experience necessary; gear provided. 970-350-9400
Sept. 5-9
Writing from the river’s edge tour; starts and ends in Grand Junction; canoeing retreat with novelist and poet Page Lambert; appropriate for writers and canoeists of all levels; course travels into Labyrinth Canyon of Utah’s Green River; $850. .
RUNNING
Thursday
Mountain Avenue Mile; in Fort Collins; three waves race down Mountain Drive; $10 to $20; 6 p.m.
. or 970-493-2379
Saturday
Run for Hope 5K; at Fort Collins City Park; also separate 12-and-under youth 5K; $12 to $20.
.
18th annual Mayor’s Cup; at Ute Pass Cultural Center, 210 E. Midland Ave., Woodland Park; 5K and 10K runs, 5K walk; competing on paved road at altitude of 8,500 feet; $15-20. city-woodlandpark.org
Tri-Lakes Twilight 5K & Fun Run; Santa Fe Trail, corner of Baptist Road and Old Denver Highway in Monument; $6 to $15; 5 p.m.
.
Sunday
Block Buster 5K & 10K; at the Federal Center, Lakewood; $20; 7 a.m.
.
Sept. 21-22
10th annual Colorado Relay from Idaho Springs to Glenwood Springs; teams compete to race 170 miles in 24 hours; $720 to $1,050 plus $200 donation to benefit charity; registration limited to 150 teams; start times between 5 a.m. and 10 a.m. .
TRAIL RUNNING
Wednesday
Nike Summit Trail Running Series No. 5; at Little French Gulch, Breckenridge; 8K and 12K; $15 to $20, free for participants 18 and younger; 5:45 p.m. 970-453-3362 or carinf@townofbreckenridge.com.
Thursday
VRD Teva Vail Mountain Trail Run at Evergold; by the Vail Recreation District. .
Saturday
Idiots Hill 9 1/2-miler; on singletrack and doubletrack trails; at Ceriani Park in Kremmling; 8 a.m.
. or 1-877-573-7926
Sunday
Buffalo Creek 12K, part of La Sportiva Front Range Trail Frenzy Series; $60 to $90; 8 a.m.
.
Teva Vail Berry Picker 10K Trail Running Race Series, at base of the Lionshead Gondola, Vail; $25; 9 a.m. . or .
SAILING/SCUBA DIVING
Today-Aug. 28
Scuba Diving Adventures for beginners; with Ron Bland from Tortuga Bay of Greeley; become certified as an open-water diver; with confined water training and open-water evaluation; three sessions of Tuesdays, 6:30-8:30 p.m. 970-350-9400
Thursday
Sailing evening at Chatfield; dinner and socializing at the restaurant at the marina starts at 5 p.m. with a short meeting and then an evening sail at 7 p.m.; for adults 18 and older; $7. .
TRIATHLON/DUATHLON
Wednesday
Dunk-n-Dash; at Nottingham Lake, Avon; 800- or 1,600-yard swim followed by a 5K run; $15 to $20; 6 p.m. 970-748-4060
Trifecta Triathlon Club Open Water Swim; at Lake Loveland Swim Beach; triathletes can work on swimming skills; $5, free for Tri2 Club members; 6 p.m.
.
Thursday
Boulder Stroke & Stride No. 9; at Boulder Reservoir Swim Beach; 6 p.m.; one-lap 750-meter swim or two-lap 1,500-meter swim followed by 5K run on the reservoir dam; also Aug. 9; $17 to $27.
.
Saturday
Highlands Ranch Splash-Mash-Dash Sprint Triathlon; at the Recreation Center at Northridge in Highlands Ranch; 800-yard indoor/outdoor swim at the rec center, 13-mile bike ride and 3 1/2-mile run; $60 pre-race registration only; 6 a.m. 303-471-7053 or kfitzgerald@hrcaonline.org
Sunday
The Great Colorado Triathlon; at Union Reservoir in Longmont; $50 to $100; 6:30 a.m.
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Calendar submissions
To get an event listed in the calendar, send your information 14-21 days in advance to: OEcalendar@denverpost.com or fax: 303-866-9004 (attn: Outdoor Extremes). Please include a contact number. Items will run on a space-available basis.
