Select / bi-weekly Tuesday mornings, summer into early fall, alternating Hallam Lake and Rock Bottom Ranch
ACES Hallam Lake Nature Preserve, Aspen (some dates at Rock Bottom Ranch, Basalt)
Beginner-friendlyNo-dropPaidSummer
A roughly three-hour morning walk for birders of all levels, led by veteran naturalist Rebecca Weiss. Discounted for ACES members. Runs select Tuesdays — confirm the date and location before going.
Most Wednesdays through the summer (weather permitting), alternating road and mountain bike events
Varies — venues from Aspen to Glenwood Springs
Beginner-friendlyCost variesSummer
18–20 races a summer, from short mountain time trials to 50-mile road races, with categories for every level. Guests can drop in per race; free for racers under 18. Locations and exact start times rotate weekly — check the schedule.
Wednesday mountain bike rounds within the alternating summer series
Varies — valley trail venues
Beginner-friendlyCost variesSummer
The mountain bike half of the club’s Wednesday series — formats from 10-minute time trials up. Categories for all abilities; under-18s race free. Confirm each week’s venue and time on the schedule.
Independence Run & Hike, 901 Highway 133, Carbondale
Beginner-friendlyNo-dropFree
A relaxed 4–5 mile route around Carbondale with drinks and snacks afterward. All paces welcome, from first-timers to veterans; bring a headlamp in the darker months.
More recurring & seasonal
Groups whose schedule rotates or is seasonal — check the source for the next date.
Seasonal volunteer trail-work days through spring–fall
Trailheads valley-wide (New Castle to Aspen)
Beginner-friendlyNo-dropFreeSummer
Build and maintain the valley’s 300+ miles of singletrack alongside fellow riders. Dates are posted through the season — check the RFMBA site and Facebook.
Open most afternoons and evenings (open daily; opens midday weekdays, mid-morning weekends)
Monkey House Carbondale, 898 Highway 133, Carbondale
Beginner-friendlyNo-dropPaid
Drop-in bouldering on a Walltopia wall plus MoonBoard and Kilter training boards; the valley’s indoor-climbing gathering spot. Confirm current hours before you go.
Daily, mid-June through early September (Maroon Bells, Snowmass, Aspen Mountain)
Maroon Bells Visitor Center, Snowmass Mall, and Aspen Mountain (Richmond Ridge)
Beginner-friendlyNo-dropFreeSummer
Free naturalist-guided walks daily in summer — Maroon Lake walks, Snowmass wildflower and Ice Age hikes, and Aspen Mountain walks. Times vary by location; see the ACES schedule.
Trailheads across the Roaring Fork Valley and surrounding public lands
Beginner-friendlyNo-dropFreeSummer
Free, guide-led hikes into the wild lands the nonprofit works to protect, with conservation context along the way. Registration required; dates posted each summer.
Volunteer projects April through October, weekdays and weekends
Trailheads valley-wide (many transit-accessible)
Beginner-friendlyNo-dropFreeSummer
Hands-on trail and restoration work, from easy to strenuous, with no experience needed. Includes evening trail-work sessions. Register on the RFOV calendar.
An introduction to fly fishing on one of Colorado’s premier Gold Medal trout rivers, run as part of the Conservancy’s watershed-education programming. Check the site for upcoming sessions.
Paddling⚠ Needs verification
Roaring Fork Kayaking Club Clinics & Pool Sessions
Seasonal pool clinics and river clinics; events posted through the year
Valley pools and Roaring Fork / Colorado river runs
Beginner-friendlyNo-dropCost variesShoulder season
Whitewater pool and river clinics, swiftwater-rescue courses, and community paddles for all skill levels. Join the newsletter to catch registrations when they open.