Rabbit Mountain Open  Space
N. 55th Street
Latitude -  40°14'47.13"N
Longitude - 105°13'28.20"W

A Boulder County Park

What a great place for families!  Plenty of hiking and mountain biking opportunities with vistas well worth the climb.

Plenty of wildlife from Deer to Prairie Dogs.
Bring plenty of water for your fun and adventure here. Restrooms available.
From Longmont: Travel West on Ute Road (Ute Highway 66) to N 53rd Street. Turn North on N 53rd Street. Bear right onto Vestal Road which turns into N 55th street. Rabbit Mountain parking will be on your right

From Highway 66 to the park is approximately 3 miles.

Hall Ranch N Foothills Open Space
Latitude -  40°12'36.95"N
Longitude - 105°17'14.46"W

A Boulder County Park

This area might be for the slightly more skilled mountain biker, but families with little ones will still find plenty of hiking opportunities here. 
Restrooms available.
From Longmont: Take the Ute Highway 66 west to Lyons. Turn south on 5th avenue (Highway 7) in the center of Lyons. Entrance is approximately 1.5 miles south on right.

Heil Valley Ranch
Latitude: 40° 8'49.24"N
Longitude: 105°18'1.23"

Take Highway SH 7/US 36 and turn west on Lefthand Canyon Drive.
 Turn right onto Geer Canyon Drive
 Proceed to entrance.
 View PDF Brochure

St. Vrain Greenway
Longmont, Colorado

A City of Longmont Project

This is a really fantastic walk or ride for families with little ones.  The Greenway is approximately 8-miles-long.  There are 11 trailheads for the St. Vrain and they are easy to find by using the City of Longmont’s website. 
 
 Restrooms at certain trailheads – refer to the map.
 
 Dogs are welcome on most of the trail.  Please note that dogs are NOT allowed between the County Road 1 and Sandstone Ranch trailheads.  This is a sensitive environmental area.