Trail
Button Rock Preserve
A gentle two-mile walk along the North St. Vrain to Longmont’s reservoir dam, with the Sleepy Lion trail above it for a loop.
Longmont’s watershed around Ralph Price Reservoir, up County Road 80 west of town. The gated dam road is a gentle two-mile walk along the North St. Vrain; the Sleepy Lion trail climbs above it and makes a 5.4-mile loop with the road. Foot travel only, no dogs, and fishing in the reservoir by a City of Longmont permit sold from April. The dirt lot at the road end is small and fills early on weekends.
At a glance hiking · river · no dogs · fishing
Checked October 3, 2026 against longmontcolorado.gov. Hours and phone numbers change fastest, so the business’s own page is the record. Report a correction · Know something opening or closing? Tell us
In the guides
Read about Button Rock Preserve
- Lyons hikes: where dogs are allowed, and where they are not
Rabbit Mountain is the one trail area near Lyons that takes dogs, on a leash; Hall Ranch, Heil Valley Ranch and Button Rock do not. In town, Bohn Park has a ten-acre off-leash area. Each manager's rule, with distances, hours and parking from its own page.
- Trails and the river: five areas inside fifteen minutes
Two creeks, one whitewater park, and five trail areas within fifteen minutes of Main Street. Start with the river gauge: the number decides what kind of day it is.
More in Lyons
Trails
Finish signing up in the new tab, then confirm by email.
Buttondown’s page asks you to press “Verify and Subscribe”, then sends an email with a link to confirm. If the tab did not open, or it shows an error, open it again or change your details.