Trail Description

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Ralph Price Reservoir is located within the Button Rock Preserve, a public sanctuary established to protect the natural watershed that feeds it. The reservoir's maintained trail system, surrounding lands and tributaries provide visitors with good year-round wildlife viewing opportunities, prized trout fishing and rare insight to how the city of Longmont, Colorado operates its water storage facility. The Ralph Price Trail is ideal for families, trail running, winter activities and anglers seeking prime locales with easy access.

The trail begins on a smooth service road, gaining nominal elevation along North St. Vrain Creek while skirting Longmont Reservoir, which at first glance appears little more than a wide, slow moving section of the creek. The main service road's mild grade increases past the Sleepy Lion Trail junction (.75 miles : 6,135’) to the Ralph Price Reservoir access road (1.4 miles); bear right on the access road and resume a steady climb.

The road soon crests (1.6 miles : 6,544'), at which point the reservoir partially reveals itself through a narrow corridor of Ponderosa Pine. From its apogee the road-trail drops leisurely to the Ralph Price Reservoir shoreline (1.9 miles : 6,430'). The reservoir's deep blue color and peripheral landscape are striking. Much of it's accessible, but informal trails on the western perimeter quickly give way to steep cliffs that should be respectfully avoided.

GPS Coordinates - DATUM WGS84

• N40 13.707 W105 20.582 - Button Rock Preserve Trailhead

• N40 13.200 W105 21.673 - Ralph Price Reservoir access trail junction - bear right

• N40 13.180 W105 22.181 - End of Ralph Price Trail at reservoir trail

Worth Noting

• The Button Rock Preserve and Ralph Price Reservoir are known for their diverse avian populations, which include Golden Eagle, Pigmy Owl, Osprey, Bald Eagle and Herons. Familiar mammals include deer, fox, coyote, mountain lion, bear and seasonal bighorn sheep.



• The Ralph Price Reservoir is a regularly patrolled area. Dog leash and control laws are strictly enforced. There is NO mountain biking or camping permitted in the Preserve.



• While it may appear possible to circumnavigate the reservoir, steep cliff walls make the route impassible.

Fishing Information

A special permit is required to fish at Ralph Price Reservoir

In addition to a standard Colorado fishing license, a special fishing permit is required. This can be obtained only from the City of Longmont City Clerk's office. Permits go on sale the 1st week in April; only 600 annual permits are issued each year, and once they are sold out, no more will be available until the following April.

Available on May 18th, 100 Day-use Fishing Permits are also available and must be purchased in advance and have a date filled out in advance. The day use permits are $10.00 each.

In general, Annual fishing permits are $30.00 for non-residents, and $20.00 for City of Longmont residents. For more permit information, contact the City Clerk (303.651.8649)

The permit allows you to fish from the shoreline with artificial flies and lures from May through October. The city of Longmont stocks the reservoir with brown and rainbow trout, along with splake, a lake trout hybrid.

Directions to Trailhead

The Button Rock Preserve Loop begins at the end of County Road 80 just northwest of Lyons, Colorado. From Lyons, take US 36 west 4 miles to County Road 80. Turn Left on County Road 80 and take it 2.8 miles to the dead end at the Button Rock Preserve parking lot. The trail begins just beyond the security gate on the service road.

Contact Information

For information, contact Longmont Water Utilities: 303-651-8376