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.
ADVENTURE RACING
May 12
Buena Vista Adventure Xstream Adventure Race; sprint or 12-hour courses; features mountain biking, whitewater kayaking, orienteering, trail running and a Tyrolean traverse. gravityplay.com or 970-259-7771
June 2-3
GNC Ultimate Mountain Challenge; in Vail; cross country mountain bike, road bike time trial, 10K trail run, class II kayak; solo or team; $100 solo, $150 teams. tevamountaingames.com
CLIMBING
May 1
Evenings with DIVAS; free climbing clinic; in Boulder; 7 p.m. outdoordivas.com
CYCLING
Mountain and road
Friday-Sunday; May 11-13
Mountain Biking Singletrack Sampler; three days on a singletrack near Fruita, with individual instruction from professional bike coach and trainer Rhonda Mayo; for beginning and intermediate riders; covers foundational and technical skills; $435. womenswilderness.org or 303-938-9191
Saturday
Family Bike Ride; in Highlands Ranch; learn trail etiquette and see wildlife on bike ride down the High Line Canal; $6-$7; 9-10:30 a.m. highlandsranch.org or 303-791-2710
April 26-29
12th New Belgium Brewing Fruita Fat Tire Festival; in Fruita. fruitamountainbike.com or 970-858-7220
April 28
International Mountain Bicycling Association Trail Building School; learn to build and maintain local trails; includes classroom and field instruction; covers basic construction, sustainable trail design, turns and drainage and bridges, reroutes, reclamation and rock work. Also, Trails 2000 will celebrate National Trails Day on June 2 and host Elbert Creek trail work with the Backcountry Horsemen on June 16. trails2000.org or 970-259-4682
April 29
Seventh Alien Run Mountain Bike Competition; in Hart Canyon, home of the alleged Aztec UFO crash; 25-mile course circles the crash site; $25 to $30; 10 a.m. azteclibrary.org/bike/competition.htm
Ongoing
Road bike rides every Saturday and Sunday along the Front Range, sponsored by Colorado HeartCycle; 20 to 100 miles; weather permitting; helmet required. heartcycle.org
Mountain bike camps, private lessons and clinics with Better Ride; for recreation riders and racers; focus on core skills, balance, vision, cornering, energy management, obstacles, drops, etc.; six-day mountain bike camp in Fruita, Saturday-April 26; women’s camp in Fruita, April 28-30; Series 2 mountain bike camp in Fruita, May 5-7; Denver cross country race camp, May 20-22. betterride.net
Ride the ski slopes all summer; chairlift rides at Crested Butte Mountain Resort are available to bikers and hikers; trails include rolling singletrack to more advanced technical terrain; all ages; lifts open in mid-June through mid-August. skicb.com or 970-349-2262
DISC GOLF/ULTIMATE FRISBEE
May 19
Ultimate Frisbee pirate-themed social mixer; at Stazio Softball Fields in Boulder; hosted by Grass Roots Ultimates; all skill levels; four games on random teams; food, beverages, prizes; 9 a.m. to 6 p.m.; $13. gasm2007.googlepages.com or gasm2007@gmail.com
HIKING
Monday
L2S hiking and backpacking training; also June 18, June 25, Aug. 20; 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
Ongoing
Open Space and Mountain Parks volunteer trail guides; Boulder Open Space and Mountain Parks (OSMP) is recruiting volunteers as trail guides; six to 10 hours per month; free classroom and field training provided in four required sessions. osmp.org or 720-579-4161
Bird watching tours with Colorado Division of Wildlife; weekends through April; in Wray; see greater prairie chicken courtship dances; reservation required. wraychamber.net/prairiechicken.html
Work the Colorado Trail; trail work and other volunteer tasks; from single day to weeklong, June to August; by the Colorado Trail Foundation. coloradotrail.org
Trail work with Trails 2000; build and maintain trails and educate trail users; volunteers needed to do trail work. trails2000.org
KAYAKING
May 29
East vs. West Amateur Kayak Rodeo; in Avon; team kayak rodeo contest between Front Range and Western Slope teams; at Whitewater Park; $20. tevamountaingames.com
Ongoing
Lessons and open pool sessions hosted by Golden River Sports; Tuesdays and Thursdays, 6:30-8:30 p.m.; reservations required; Golden Recreation Center. 303-215-9386
Open pool session and beginner and expert lessons hosted by Confluence Kayaks; 8-10 p.m. Tuesdays; lesson with gear, $45, open pool access only, $10; reservations required; University of Denver’s El Pomar Natatorium, 2201 E. Asbury Ave. 303-433-3676 or confluencekayaks.com
Open pool session hosted by Pikes Peak Whitewater Club and Colorado Kayak Supply; 5-7 p.m. Sundays; introductory lessons from 3-5 p.m.; Cheyenne Mountain High School pool, 1200 Cresta Road, in Colorado Springs. pikespeakwhitewaterclub.com
RUNNING
Saturday
Toyota Benefit Running Series; includes the James “Spank” Blasing Memorial 5K on Saturday and the Cinco de Mayo 10K Run and Fun Walk on May 6; at CSU-Pueblo/State Fair Grounds in Pueblo; $30-$45; 8 a.m. starts. twolves.colostate-pueblo.edu/benefit/index.asp
Fast and the Furriest 5K/1K walk-run; at CSU Veterinary Medical Center in Fort Collins; $10-$22; 9 a.m. Active.com
Ryan Elementary 5K Fun Run/Walk; in Westminster; $15-$20; all ages; 8 a.m. 303-982-3105
20th Elbert Reflections; 5K and 10K; at Elbert Park Track in Elbert; run on gravel roads; $16-$18; 9 a.m. 303-648-3030 or pprrun.org
Saturday-Sunday
Survivor Stride ’07 Denver; walk/run individually or as a team; $14-$20. survivorstride.com
Sunday
Belleview Chiropractic 5K Run/Walk; $25; at Cherry Creek State Park in Greenwood Village; an official Bolder Boulder qualifier; USATF-certified 5K; 9 a.m. belleviewchiro.com
Earth Day 10K and Eco-adventure Walk; at Paepcke Park in Aspen; $10-$30; 9 a.m. 970-925-1481
Wild Oats Earth Day 4K; in Boulder; $8-$25; 9 a.m. conservationcenter.org
May 12
Columbine High School Run For Remembrance; 5K competitive run and 5K fun run/walk; more than 900 runners last year; in Littleton; $25; 8 a.m. jeffcoweb.jeffco.k12.co.us/high/columbine or active.com
May 19
Mike the Headless Chicken 5K; part of Fruita’s Mike-the-Headless-Chicken Days; in Fruita; 9 a.m. fruita.org or 970-858-0360
May 20
Miles for Smiles 5K run/walk; at the new Broomfield Commons Park; on mostly open space trails; $13 to $25; 9 a.m. twoangelsfoundation.org
Ongoing
Dash and Dine 5K No. 1; in Boulder; part of a 5K race series every Tuesday through May 15; starts at Coot Lake; $15 to $20; official Bolder Boulder qualifier; 6:30 p.m. 303-939-8000
TRAIL RUNNING
Friday-Sunday
Desert RATS: Spring Desert Ultra Trail Running Festival; in Fruita; Saturday is a trail run of 25 or 50 miles; Sunday has 5- and 10-mile trail races; 5-mile: $25, 10-mile; entire weekend: $100. geminiadventures.com
Saturday
La Sportiva Front Range Trail Frenzy Series; includes five races: Saturday, Chatfield 7.5-mile; May 20, Castlewood Canyon 6.5-mile; June 23, Buffalo Creek 12K; July 21, Golden Gate Canyon Trail Run 12.7-mile; Aug. 12, Lookout Mountain Hill Climb 4.5-mile; $60-$90; 8 a.m. runuphillracing.com
HRCA Heritage/Adventure Run 5K and 10K; run/walk along the Dad Clark Trail; at Mountain Vista High School in Highlands Ranch; $25-$45; 8:30 a.m. highlandsranchrunseries.com
April 28
Garfield Grumble 5-mile Trail Run; begins at Garfield Trailhead outside Palisade, climbs more than 2,000 feet, then descends; advance trail; $5; 8 a.m. 970-245-4382
May 5
Girls-on-the-run 5K; part of national GOTR series; at Matchett Park in Grand Junction; open to females of all ages; $15 to $25; 9 a.m. 970-257-9267 or info@girlsontherungv.com
May 12
South Suburban’s 26th High Line Canal Run and Walk; 10K run or 5K run/walk; Bolder Boulder qualifier; at deKoevend Park in Littleton; all ages; $20 to $25; 8 a.m. sspr.org or 303-798-7515
Nov. 10
Mesa State 37K RimRock Run; gate to gate through the Colorado National Monument, outside Grand Junction; 8 a.m. rimrockrun.org or 970-243-4055
SAILING
May 31-June 3
SAIL sailing class for beginners; intense, four-day, 40-hour course covers psychology, lesson planning and on-the-water techniques; all levels; at Cherry Creek Reservoir; $280-$300. ussailing.org or 303-757-7718
Ongoing
Colorado State Parks boating safety classes; at various locations; open to adults and teens; includes a home-study manual, a two-hour classroom review and a written exam. parks.state.co.us
BACKCOUNTRY SKIING
May 4-6
Backcountry ski mountaineering hut trips to Summit County; for advanced intermediate and better; telemark, alpine or snowboard, women only; must have previous backcountry experience; includes breakfast and dinner at the hut, lodging, snacks, backcountry safety equipment and guided instruction, and morning yoga; $350. 970-453-4060 or babesinthebackcountry.com
SKIING/SNOWBOARDING
Saturday
Vert Alert Terrain Park Competition Session No. 2; annual freestyle ski and snowboard competition at Love Park; at Loveland Ski Area. skiloveland.com
Silverton Mountain Hardcore Challenge COSMIC backcountry ski race; at Silverton Mountain in Silverton; $60 includes lift ticket; men’s and women’s divisions; three ability levels; 10 a.m. cosmicski.com
April 28
Corn Harvest Benefit Ski Party at Loveland Ski Area; for the Colorado Avalanche Information Center. skiloveland.com
TRIATHLON/DUATHLON
June 5
Evenings with DIVAS; free triathlon clinic; in Denver; 6:30 p.m. outdoordivas.com
MISCELLANEOUS
Saturday
Subaru Spring Tune Up Fitness Festival; with Women’s Quest fitness retreat program; free; with experts from cycling, running, yoga, nutrition and backpacking to help prepare for the Bolder Boulder and other outdoor events; 9 a.m. to 2 p.m. at Sherpani Warehouse in Boulder. colleen@womensquest.comor 303-545-9295
SKI AREA CLOSING DATES
Sunday
Breckenridge
Vail
May 2
Silverton
May 6
Loveland
June 5
Arapahoe Basin
Closed
Aspen Highlands
Aspen Mountain
Beaver Creek
Buttermilk
Copper Mountain
Crested Butte
Closed
Echo Mountain
Eldora
Howelsen Hill
Keystone
Monarch Mountain
Powderhorn
Purgatory (Durango)
Ski Cooper
Snowmass
Steamboat
Sol Vista
Sunlight
Telluride
Winter Park
Wolf Creek
