Alderfer/Three Sisters Open Space Park wilderness guide
Open Space Park · CO

Alderfer/Three Sisters Open Space Park

Alderfer/Three Sisters Open Space Park offers an inviting combination of towering rock formations and picturesque trails in the foothills of Evergreen, Colorado.

Open Space Park1,1284+ Trails

Designation

Open Space Park

Total Wilderness Area

1,128

Elevation / Terrain

Diverse Wilderness

Field Editorial Guide

About Alderfer/Three Sisters Open Space Park

Alderfer/Three Sisters Open Space Park offers an inviting combination of towering rock formations and picturesque trails in the foothills of Evergreen, Colorado.

Wilderness Landscape & Natural Heritage

Alderfer/Three Sisters Open Space Park is located just outside Evergreen, Colorado, and covers approximately 1,128 acres. The park is known for its unique geological formations, including the famous 'Three Sisters' rock piles and 'The Brother.' These recognizable landmarks provide stunning vistas and are popular with hikers and climbers alike. The ecosystem consists of a rich forested mix of ponderosa pine and mixed conifer species, offering habitat to a range of wildlife such as mule deer, elk, and several bird species. Historically, the area was used by early ranchers, and remnants of past agricultural activities can still be seen throughout the park. Several trails meander through this open space, accommodating a variety of recreational activities, including hiking, mountain biking, and horseback riding. The park is a popular spot for locals and tourists seeking a retreat into nature while remaining in proximity to Denver.

Field Guide · Open Space Park
Adventure Destinations

Notable Destinations Near Alderfer/Three Sisters Open Space Park

Scenic viewpoints, outdoor landmarks, and notable points of interest within 60 miles.

Key Wilderness Highlights

✦ Three Sisters and The Brother rock formations✦ Diverse wildlife including deer and a variety of bird species✦ Scenic panoramic views from trails such as the Summit Trail✦ Networking of trails suitable for all levels of hikers
Wilderness Recreation

Outdoor Adventures in Alderfer/Three Sisters Open Space Park

Explore curated guides for top outdoor sports, trail networks, and wilderness activities.

Park Recreation

Hiking

Available in Alderfer/Three Sisters Open Space Park
Park Recreation

Mountain Biking

Available in Alderfer/Three Sisters Open Space Park
Park Recreation

Wildlife Viewing

Available in Alderfer/Three Sisters Open Space Park
Park Recreation

Photography

Available in Alderfer/Three Sisters Open Space Park
The Ranger Station

Visitor Logistics & Essential Planning

Everything you need to know about entrance passes, seasons, visitor centers, road transit, and wildlife safety in Alderfer/Three Sisters Open Space Park.

Passes & Fees

Entrance Requirements & Interagency Passes

Free access, no permits required

Wilderness Checklist

Carry paper topographic map & compass in remote zones.
Store all food and scented items in approved bear canisters.
Check wildfire / smoke advisories before backcountry departure.
Pack out everything you pack in (Leave No Trace).
Adventure Basecamps

Gateway Towns Near Alderfer/Three Sisters Open Space Park

Stay, dine, and gear up in these mountain towns and scenic basecamps surrounding the park.

Evergreen, Colorado
⌖ 1.56 miles
Gateway Basecamp

Evergreen, Colorado

Evergreen, CO is a cozy mountain town ideal for outdoor enthusiasts. Known for hiking, biking, and paddling, it's your gateway to the Rockies' adventures, from serene lakes to rugged wilderness.

Summer and Fall
Explore Town
Conifer, Colorado
⌖ 7.77 miles
Gateway Basecamp

Conifer, Colorado

Conifer, CO offers quiet mountain adventures with hiking, mountain biking, fishing, and winter snowshoeing amid tall pines and peaceful lakes. It’s a convenient base for exploring Staunton State Park and the Front Range outdoors year-round.

Late Spring through Fall
Explore Town
Morrison, Colorado
⌖ 8.66 miles
Gateway Basecamp

Morrison, Colorado

Morrison, CO welcomes outdoor lovers with iconic red rock trails, rugged climbs, and vibrant wildlife. Just west of Denver, it’s a perfect base for hiking, biking, climbing, and soaking in Colorado’s foothill beauty year-round.

Spring through Fall
Explore Town
Golden, CO
⌖ 11.07 miles
Gateway Basecamp

Golden, CO

Golden, CO offers easy access to mountain hiking, biking, climbing, and paddling along Clear Creek. With close proximity to Denver, it’s a vibrant basecamp for outdoor lovers seeking foothills and Rockies adventures year-round.

Late Spring to Early Fall
Explore Town
Golden, Colorado
⌖ 11.07 miles
Gateway Basecamp

Golden, Colorado

Golden, Colorado is an outdoor playground offering an array of activities from hiking and biking in the foothills to rock climbing and kayaking in Clear Creek Canyon. Discover stunning views and vibrant local culture just outside Denver.

Spring and Fall
Explore Town
Pine, Colorado
⌖ 11.67 miles
Gateway Basecamp

Pine, Colorado

Pine, Colorado, is a quiet mountain town perfect for outdoor lovers seeking hiking, fishing, biking, and winter snow adventures in Arapaho National Forest's peaceful surroundings.

Late Spring to Early Fall for hiking and biking; Winter for skiing and snowshoeing
Explore Town
Expert-Led Wilderness Expeditions

Guided Experiences in Alderfer/Three Sisters Open Space Park

Explore scenic backcountry routes and epic wilderness adventures with certified local mountain guides, naturalists, and outfitters.

Behind the Boat: Short, Sharply Focused Watersports off Morrison
ADVEXPEDITION
Morrison, Colorado
Water ActivitiesADV Bookable

Behind the Boat: Short, Sharply Focused Watersports off Morrison

A concise, operator-run offering in Morrison that lets you choose 15 minutes or a full hour of waterskiing, wakeboarding, wakesurfing or tubing—ideal for a single adrenaline hit or a longer practice session.

Water ActivitiesPT2HCertified Outfitter
Bookable OnlineBook Trip