St. Vrain State Park wilderness guide
State Park · CO

St. Vrain State Park

St. Vrain State Park offers diverse outdoor recreation across its lakes, wetlands, and open spaces, providing excellent opportunities for fishing, hiking, wildlife viewing, and camping near Longmont, Colorado.

State Park11394+ Trails
DesignationState Park
Total Wilderness Area1139
Elevation / TerrainDiverse Wilderness
Field Editorial Guide

About St. Vrain State Park

St. Vrain State Park offers diverse outdoor recreation across its lakes, wetlands, and open spaces, providing excellent opportunities for fishing, hiking, wildlife viewing, and camping near Longmont, Colorado.

Wilderness Landscape & Natural Heritage

St. Vrain State Park is located in northern Colorado, encompassing over 1,100 acres of recreational lands centered around two reservoirs: Union Reservoir and Joe Wright Reservoir. The park’s landscape features prairie grasslands, wetlands, and brush-covered hills that provide varied habitats for an array of wildlife species, including herons, bald eagles, and various waterfowl. Established in 1964, St. Vrain remains a popular destination for anglers targeting trout and warm-water species, as well as non-motorized boating. The park offers over 14 miles of multi-use trails for hiking, biking, and horseback riding. Birdwatchers appreciate the park’s wetlands and riparian zones, which attract migratory and resident birds throughout the year. Popular recreational activities include camping at its two developed campgrounds with full amenities, kayaking, paddleboarding, and wintertime ice fishing. The park’s proximity to the city of Longmont makes it an accessible outdoor escape for residents and visitors alike. Facilities include picnic areas, fishing docks, boat ramps, and a swim beach. The park’s setting in the Front Range foothills creates scenic vistas of nearby mountains and expansive sky views during sunset and sunrise. St. Vrain State Park combines water-based recreation with trail access and wildlife observation to provide a well-rounded park experience in a semi-arid environment. Visitors are encouraged to respect wildlife habitats and adhere to park regulations to help maintain its ecological health and recreational value.

Field Guide · State Park
Adventure Destinations

Notable Destinations Near St. Vrain State Park

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

Key Wilderness Highlights

✦ Union Reservoir – a popular fishing and paddle sports destination✦ Wetlands providing excellent birdwatching opportunities✦ Developed campgrounds with full amenities near the reservoirs✦ Multi-use trails winding through diverse prairie and riparian habitats
Wilderness Recreation

Outdoor Adventures in St. Vrain State Park

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

Park Recreation

Hiking

Available in St. Vrain State Park
Park Recreation

Camping

Available in St. Vrain State Park
Park Recreation

Wildlife Viewing

Available in St. Vrain State Park
Park Recreation

Mountain Biking

Available in St. Vrain State Park
Park Recreation

Fishing

Available in St. Vrain State Park
Park Recreation

Paddle Sports

Available in St. Vrain State Park
Park Recreation

Snow Sports

Available in St. Vrain State Park
Park Recreation

Scenic Drives

Available in St. Vrain State Park
Park Recreation

Photography

Available in St. Vrain State 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 St. Vrain State Park.

Passes & Fees

Entrance Requirements & Interagency Passes

Daily vehicle entry fee or annual Colorado State Parks pass 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).
Wilderness Stays

Camping & Overnight Stays in St. Vrain State Park

Frontcountry developed campgrounds, backcountry wilderness permit guidelines, and starry-night camping advice.

Union Reservoir Campground

Located near Union Reservoir, offering tent and RV sites with water, electric hookups, and nearby restrooms.

Joe Wright Campground

Smaller campground on the east side of Joe Wright Reservoir, featuring basic amenities and close access to the lake.

Adventure Basecamps

Gateway Towns Near St. Vrain State Park

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

Longmont, Colorado
⌖ 1.48 miles
Gateway Basecamp

Longmont, Colorado

Longmont, Colorado offers easy access to mountain biking, hiking, and skiing with stunning views and diverse trails. Enjoy urban comforts while exploring the rich landscapes.

Summer and Fall
Explore Town
Lyons, Colorado
⌖ 8.26 miles
Gateway Basecamp

Lyons, Colorado

Lyons, Colorado offers adventures in hiking, biking, and paddling among the stunning Rocky Mountains. A haven for nature enthusiasts, it provides the perfect gateway to explore Northern Colorado's beauty.

Spring, Summer, and Fall
Explore Town
Erie, Colorado
⌖ 9.20 miles
Gateway Basecamp

Erie, Colorado

Erie, Colorado offers front-range outdoor adventure with hiking, biking, fishing, and winter sports just minutes from town. Its scenic trails, open spaces, and proximity to the Rockies make it a perfect launch point for year-round activity.

Spring through Fall for hiking and biking; Winter for snow sports nearby
Explore Town
Berthoud, Colorado
⌖ 9.89 miles
Gateway Basecamp

Berthoud, Colorado

Berthoud, Colorado offers easy access to Colorado’s Front Range outdoor pursuits from hiking and biking to fishing and winter skiing. Its small-town charm pairs with scenic berths into Roosevelt National Forest and Berthoud Pass adventures.

Spring through Fall, with winter for snow sports
Explore Town
Firestone, Colorado
⌖ 10.82 miles
Gateway Basecamp

Firestone, Colorado

Firestone, Colorado is a quieter Front Range town perfect for outdoor lovers wanting easy trail access without crowds. Enjoy hiking, biking, fishing, and bird watching across regional parks and open spaces just minutes from residential areas.

Spring through Fall
Explore Town
Frederick, Colorado
⌖ 11.23 miles
Gateway Basecamp

Frederick, Colorado

Frederick, Colorado offers accessible Front Range outdoor activities with miles of trails for hiking, mountain biking, and trail running. It’s a friendly basecamp near St. Vrain State Park, popular for paddling and camping, with nearby winter skiing options.

Spring through Fall for hiking and biking; Winter for cross-country skiing
Explore Town
Expert-Led Wilderness Expeditions

Guided Experiences in St. Vrain State Park

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

2 Hour Rental - Longmont
ADVEXPEDITION
Longmont, Colorado
Water ActivitiesADV Bookable

2 Hour Rental - Longmont

Experience the joy of paddleboarding, kayaking, or canoeing in Longmont with a full safety briefing and all gear included. Perfect for beginners and nature lovers alike!

Water ActivitiesCertified Outfitter
Bookable OnlineBook Trip
1 Hour Rental - Barefoot
ADVEXPEDITION
Longmont, Colorado
RentalsADV Bookable

1 Hour Rental - Barefoot

Explore Longmont's tranquil lake with a 1-hour paddleboard, kayak, or canoe rental from Rocky Mountain Paddleboard. Perfect for beginners, this peaceful adventure lets you soak in stunning views and local wildlife.

RentalsCertified Outfitter
Bookable OnlineBook Trip
Above Longmont: A Private Hot‑Air Balloon Flight with Champagne and a Keepsake
ADVEXPEDITION
Longmont, Colorado
BalloonADV Bookable

Above Longmont: A Private Hot‑Air Balloon Flight with Champagne and a Keepsake

A private hot‑air balloon experience for two from Life Cycle Balloon Adventures in Longmont that includes a preflight beverage, a one‑ to 1.5‑hour flight, and a post‑flight champagne toast and commemorative certificate—this guide explains what to expect.

BalloonPT2HCertified Outfitter
Bookable OnlineBook Trip