Originally called Calkins Lake, the Union Reservoir was carved out during the last glacial age and is one of only a few natural lakes in Colorado. In 1903, the Union Ditch Company began drilling a tun... Log into read more...
Getting there: Take I-25 to Highway 119 (Longmont exit). Go west to County Line Road 1. Go north approximately 3/4 of a mile and turn right at the sign for Union Reservoir. The entrance is about 1/2 mile up this road on your left.
Union Trailer Sites# of Sites: 28 Fees: $8 plus gate fee
Open May 1. There are good trailer sites in the wide open area to the north of the boat ramp. There are no hookups or dump stations. Very close to inlet for good fishing. Sites are very close to one another.
Union Tent Sites# of Sites: 14 Fees: $8 plus gate fee
Open May 1. These sites are fairly wide open, but offer a nice place to stay if you're looking to do other things than be out in the wilderness in total seclusion. The sites are available for reservation by phone at 303-772-1265.