North of Boulder ยท Foothills open space

Heil Valley Ranch

Heil Valley Ranch is a 6,231-acre Boulder County Open Space property in the foothills between Boulder and Lyons, with ponderosa-forest hiking and mountain biking on designated trails, no fee, and no dogs allowed.

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Heil Valley Ranch quick facts

Distance / loops
Eight designated trails, published individually by Boulder County. Loop options include the easy Lichen Loop (1.3 miles), the Ponderosa Loop (2.6 miles), and the Wapiti Trail (3.0 miles); the Picture Rock Trail runs 5.2 miles toward Lyons.
Elevation gain
Boulder County does not publish a per-trail elevation gain. The terrain is rolling foothills, and the Wapiti and Ponderosa routes climb steadily from the trailhead into the ponderosa forest.
Difficulty
Easy to moderate. Lichen Loop, Grindstone Quarry, and Schoolhouse Loop are rated easy; Wapiti, Ponderosa Loop, Wild Turkey, Overland Loop, and Picture Rock are rated moderate.
Bikes
Allowed on designated trails only, including Wapiti, Ponderosa Loop, Wild Turkey, Overland Loop, Schoolhouse Loop, and Picture Rock. Not permitted on Lichen Loop or the Grindstone Quarry Trail. No e-bikes on any trail.
Dogs
Not allowed. Boulder County prohibits dogs at Heil Valley Ranch entirely, due to wildlife concerns. This is stricter than most county open space, so leave the dog at home.
Fee
Free. Boulder County Parks & Open Space charges no entrance or parking fee. Day use only.
Trailheads / parking
Two trailheads off Geer Canyon Road: the lower Corral Trailhead (1188 Geer Canyon Rd), best for beginner mountain bikers, and the upper Wapiti Trailhead (the original main trailhead). There is also a 12-space overflow lot on Geer Canyon Road.
Best season
Spring through fall. The ponderosa pine gives filtered shade in summer; check for fire restrictions and monsoon flash-flood closures before you go.

Heil Valley Ranch at a glance

Heil Valley Ranch is a large Boulder County Open Space property tucked into the foothills north of Boulder, off Lefthand Canyon Drive on the way toward Lyons. Boulder County counts 6,231 acres here, much of it ponderosa pine forest laced with grassy hillsides, sandstone outcrops, and quiet side canyons. It's a hiker's and mountain biker's place: no beach crowds, no fee booth, just trails climbing off two trailheads into the pines. It's also serious wildlife habitat, which shapes two rules worth knowing before you drive out.

The two big rules: no dogs, on-trail only

Two things surprise first-time visitors. First, dogs are not allowed at Heil Valley Ranch, at all, because of wildlife concerns. That's stricter than most Boulder County Open Space, where leashed dogs are fine, so if you're bringing a dog, pick a different trail. Second, travel is restricted to on-trail use only, both to protect critical wildlife habitat and because parts of the property still carry burn-area hazards. Stay on the marked trails and you're set.

Trails at Heil Valley Ranch

Boulder County lists eight designated trails here, ranging from short and easy to a moderate half-day loop. The Wapiti Trail climbs from the main trailhead into the forest and links to the Ponderosa Loop, the classic Heil hike. The short Lichen Loop is the easy leg-stretcher, and the Picture Rock Trail runs the length of the property toward Lyons.

Trail Distance Difficulty Bikes
Lichen Loop 1.3 miles Easy No
Grindstone Quarry Trail 1.4 miles Easy No
Schoolhouse Loop 0.9 miles Easy Yes
Overland Loop 2.3 miles Moderate Yes
Ponderosa Loop 2.6 miles Moderate Yes
Wild Turkey Trail 2.9 miles Moderate Yes
Wapiti Trail 3.0 miles Moderate Yes
Picture Rock Trail 5.2 miles Moderate Yes

Trail names, distances, and difficulty ratings are from Boulder County's Heil Valley Ranch page. The county also maintains a short Skills Loop for beginner mountain bikers near the Corral Trailhead.

Mountain biking

Heil Valley Ranch is one of the better bike-legal networks in the county, but bikes are allowed on designated trails only. Riders get the Wapiti Trail, Ponderosa Loop, Wild Turkey Trail, Overland Loop, Schoolhouse Loop, and the long Picture Rock Trail toward Lyons, plus a Skills Loop that ends with a ride through an old boxcar. The Lichen Loop and Grindstone Quarry Trail are hiker-only, and e-bikes are prohibited everywhere. If you're new to dirt, the Schoolhouse Loop off the Corral Trailhead is the gentle place to start.

Trailheads and parking

Both trailheads are off Geer Canyon Road, which climbs from Lefthand Canyon Drive. The lower Corral Trailhead (1188 Geer Canyon Rd) sits closest to the beginner bike loops. The upper Wapiti Trailhead is the original main lot and reaches the longer trails into the forest. There's also a 12-space overflow lot on Geer Canyon Road. One heads-up: during summer monsoon season, Boulder County may close the Wapiti Trailhead lot when heavy rain or flash flooding is possible, so have a backup plan and watch the sky.

Ponderosa forest, wildlife, and the old quarry

The draw here is the ponderosa pine forest and the wildlife it shelters. Boulder County says the property is home to more than 50 species of mammals, about 70 percent of all the mammals found in the county, and nearly 100 kinds of birds, with golden eagles and prairie falcons nesting in the cliffs. There's history underfoot too: the Whitestone and Vickery Quarry Complex along the Picture Rock Trail mined Lyons sandstone from the 1890s to the 1960s, and that stone shows up in buildings on the University of Colorado campus.

Fire, flood, and current conditions

The 2020 Cal-Wood Fire burned hard through the south side of Heil Valley Ranch, which is part of why on-trail travel matters here. Boulder County posts recovery updates, seasonal fire restrictions, and monsoon flood closures on its official page, and conditions change through the year. Check the county's Heil Valley Ranch page for the current status before you head out.

Nearby trails and guides

Recommended nearby

A few local spots we'd point a Heil Valley Ranch day toward.

Bike shop

[CLIENT SLOT: featured bike shop near Heil Valley Ranch]

[One honest line: tune-up, rental, or trailside repair on the way in.]

Cafe

[CLIENT SLOT: featured cafe near Lyons or north Boulder]

[One honest line: coffee or a bite before or after the ride.]

Retail

[CLIENT SLOT: featured outdoor shop near Heil Valley Ranch]

[One honest line: water, layers, or trail snacks.]

Heil Valley Ranch FAQ

Are dogs allowed at Heil Valley Ranch?

No. Boulder County does not allow dogs at Heil Valley Ranch at all, due to wildlife concerns. Unlike much of Boulder County Open Space, there is no leash option here, so plan to leave your dog at home and choose a dog-friendly trail elsewhere.

Can you mountain bike at Heil Valley Ranch?

Yes, on designated trails only. Bikes are welcome on the Wapiti Trail, Ponderosa Loop, Wild Turkey Trail, Overland Loop, Schoolhouse Loop, and Picture Rock Trail, plus the Skills Loop. Bikes are not allowed on the Lichen Loop or the Grindstone Quarry Trail, and e-bikes are prohibited on every trail.

Is there a fee to visit Heil Valley Ranch?

No. Boulder County Parks & Open Space charges no entrance or parking fee at Heil Valley Ranch. It is a day-use area, open sunrise to sunset.

Where do you park at Heil Valley Ranch?

There are two trailheads off Geer Canyon Road. The lower Corral Trailhead (1188 Geer Canyon Rd) is the pick for beginner mountain bikers, with the Skills and Schoolhouse loops nearby. The upper Wapiti Trailhead is the original main lot and reaches the longer trails. A 12-space overflow lot sits on Geer Canyon Road, and the Wapiti lot can close during monsoon-season flash-flood risk.

What is the best hike at Heil Valley Ranch?

For a classic outing, start at the Wapiti Trailhead and climb the Wapiti Trail to the Ponderosa Loop, a moderate route through open ponderosa forest. For a short, easy leg-stretcher, the 1.3-mile Lichen Loop is the one, and the 5.2-mile Picture Rock Trail carries riders and hikers all the way toward Lyons.

Sources

Facts on this page are drawn from these authoritative sources: