THURSDAY, JUNE 6
Hike at Sunset — With volunteer naturalists to talk about the history, geology, ecosystems, wildlife and plants. 6:30-8:30 p.m. Rabbit Mountain Open Space, Boulder County, 303-678-6214.
Ski Hidden Valley Estes Park — With filmmaker Brian Brown. 7 p.m. Neptune Mountaineering, 633 South Broadway, Boulder, 303-499-8866.
Stroke and Stride — Competitive swim and run. 6 p.m. Boulder Reservoir, 5565 N. 51st St., Boulder, www.withoutlimits.co.
FRIDAY, JUNE 7
Saturn’s Rings Telescope Program. 9 p.m. Sage Trailhead at Boulder Valley Ranch, Boulder County, www.naturehikes.org.
SATURDAY, JUNE 8
Fitness in the Foothills — Drop-in fitness class. 8:15 a.m. Flagstaff Mountain, Realization Point to Mays Point and Artists Point, Boulder, http://fitliv.com/bc_saturday_drop_in.htm.
Fly Fishing Classes — Level one class, free. 9 a.m. The Orvis Company, 629B S. Broadway, Boulder, 303-554-0122.
Geology Walk at Sandstone Ranch — With volunteer naturalist. 10 a.m. Sandstone Ranch Open Space Visitor Center, south of Highway 119, one mile east of Weld County Road 1, 303-678-6214.
National Psoriasis Walk to Cure Psoriasis — 1K or 5K routes. 9 a.m. check in. Discovery Green, W. 17th Avenue and Utica Street, Denver, http://walk.psoriasis.org/denverwalk.
Re-Wilding Minds: Nature as Our Guide to Mental Health — With Margot Smit, life coach, and Lynne Sullivan, naturalist. 9 a.m. Boulder, register at www.rewild.eventbrite.com.
Water Tour — An on-the-ground view of agricultural water resources with Boulder County Parks and Open Space. 8:45 a.m. Boulder County, www.bouldercountyopenspace.org/agtours.
SUNDAY, JUNE 9
Cargo Bike Food Drive — Bring as much donated food for Harvest Hope Food Pantry to a food drive with Community Cycles and Boulder Food Rescue. 10 a.m. Community Cycles, 2805 Wilderness Pl., Ste. 1000, Boulder, 720-565-6019.
TUESDAY, JUNE 11
A Trans-Siberian Railroad Journey Across Russia. 7 p.m. Changes in Latitude Travel Store, 2525 Arapahoe Ave., Boulder, 303-786-8406.
WEDNESDAY, JUNE 12
Newcomers’ Hike to a Flatiron. 5:30 p.m. Chautauqua Ranger Cottage, 900 Baseline Road, Boulder, www.naturehikes.org.
Night Hike at Heil Valley Ranch. 8:30 p.m. Lichen Loop Trail at Heil Valley Ranch, Lefthand Canyon Drive to Geer Canyon Drive, Boulder County, 303-678-6214.
Ultimate High: Mountain Biking the Colorado Trail. 6:30 p.m. REI Store, 1789 28th St., Boulder, 303-583-9970.
To list your event, send information to: firstname.lastname@example.org. attn: “Adventure.”