06/08/2011 04:49 pm ET | Updated Aug 08, 2011

Shape Up! Best Outdoor Fitness Classes In Denver-Boulder

Skip the gym and the sweat-soaked smells that accompany it. Instead, lather on your sunscreen and check out these six outdoor fitness classes to get your blood pumping in mountain-fresh air during the summer months.

Boot Camp: No matter your fitness level, trainer (and former marine) Scott Harwood of Scott’s Denver Boot Camp will get your booty into tip-top shape in no time with a combo of cardio, weights and core strengthening. Throughout the summer, you’ll find classes downtown at both Wash Park and Cheesman Park.
Mondays through Saturdays, times vary; $39/single session, bulk rates available
Wash Park, Ohio & S. Downing St.; 303-601-5851
Cheesman Park; Eighth & Williams St.; 303-601-5851

Tai Chi: Begin your day with an extra dose of qi with free Sunrise Tai Chi sessions at City Park, overlooking Ferril Lake and a view of the cityscape in the distance. The Tai Chi Project presents classes weekly, which are open to all.
Tuesdays, June - Aug, 7am - 8:30am; free
City Park, near the rose gardens west of Museum of Nature and Science

PowerFit Yoga: Blending Vinyasa-style yoga with principles of Pilates, Boulder’s Fitness for Living offers month-long camps as well as drop-in options. Held outdoors through late October near the spectacular Flatirons, each session is unique to keep your experience fresh. Both coed and women-only options are available; childcare is offered for select time slots.
Beginning at $119/5 weeks, $15/drop-in
Boulder, Scott Carpenter Park (south of Arapahoe on 30th St.); 303-550-3491

Rock Climbing/Rapelling: Climbing up, rappelling down, belaying … Apex Ex will get novices started, or offer a serious challenge if you have experience under your belt. Locations include formations in Golden and Boulder’s Flatirons amongst a slew of others. Trips range from half days for the beginner and intermediate, to four days for the mountaineerer; equipment is provided.

Kayaking: Spend a hot summer day on the cool water with a kayaking class on Chatfield Reservoir. Once you’ve taken the flat-water intro, you’re free to participate in classes on the South Platte River. Groups range between 8 - 12 people with private instruction available; lake classes meet at Chatfield, while river participants meet at Confluence Kayaks.
$149 full-day/Chatfield, $249 two-day/Chatfield & South Platte River
Confluence Kayaks, 2373 15th St., Unit B; 303.433.3676

Trail Running: If you prefer a solo fitness routine but could benefit from a professional program, check out the V3 Trail Running services. Trainer and competitive runner – and V3 founder – Samantha Watts will set you up with a personalized online program based on your physiology, history and goals with regular consultations.
Boulder; 303-483-1166