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Union Reservoir Activities





Union Reservoir will open for camping on May 1, 2014 and will end for the season on October 31, 2014.  There are 28 designated RV sites that overlook the picturesque reservoir and 14 tent sites that are located close to the swim beach and playground.  Camping will be available only on Friday and Saturday nights and will be extended on Holiday weekends.  Campsites will be provided on a first come first served basis.

Union Reservoir - RainbowDuring the Memorial Day weekend, camping will be available from Friday, May 23 through Sunday, May 25.  For Independence Day, camping will be available from Thursday, July 3 through Saturday, July 5 and during the Labor Day weekend, camping will be available from Friday, August 29 through Sunday, August 31. 

Camping will not be permitted weekdays, Sunday through Thursday nights, with the exception of pre-approved special events and Scout groups who are using the Scout Circle.  For additional information please call the Reservoir Office at 303-772-1265.


The boat ramp will be open for the season on March 1st. Mandatory boat inspections are required before launching. Inspections are currently available between 8:00 am and 5:00 pm daily.

Water Conditions

The current water level is approximately 26 feet and the reservoir is at capacity at 28 feet.

Information regarding activities at the reservoir and water levels will be updated as they become available, or you may call the reservoir office at 303-772-1265 for current information.


Union Reservoir is fast becoming one of Colorado's finest Wiper fisheries. Wiper 15 to 26 inches are common. In recent years, Union Reservoir has become the hotspot for fly fishermen who enjoy the thrill of catching the hard fighting Wiper. In addition, a healthy population of Trout, Crappie, Catfish, Bass, Sunfish, Walleye and Tiger Muskie provide a quality fishing experience. Fishing is available along the majority of the shoreline or from a boat. Colorado fishing regulations are enforced and a fishing license is required. A fish cleaning station and handicapped accessible fishing pier are provided for your convenience. Back to fishing home page.


Swimming at the Beach

Our sandy beaches provide a gathering spot for young and old alike. Lifeguards are stationed at the beach for your safety. Swimming is allowed during posted hours only. A sand volleyball court, picnic shelter and playground are located near the beach for your enjoyment. Temporary loading and unloading is permitted along the beach for easy access, with parking in the paved lot. Swim diapers and other water equipment are available for sale at the Union Store.

The dates for the open water swim clinics are June 30th and July 21st.

2014 Swim Beach Hours



One of the best windsurfing spots in northern Colorado! Easy water front access with great conditions creates a windsurfer's paradise.


Numerous picnic sites with table and grills are located throughout the park. Both group and individual sites are available on a first come, first served basis. In addition, the main picnic area and picnic shelter may be reserved by calling the Reservoir office at (303) 772-1265.


Dog Training Area

A dog training area is located on the south side of the reservoir. Dogs are allowed off leash and may swim in this designated area. Dogs must be leashed in all other areas of the park.

Union Store/Concessions

A variety of vending machines are available in the concession building by the gatehouse. Visit the Union Reservoir Store Friday through Sunday during summer hours. Items available include camping and fishing supplies, assorted beverages, snacks, candy and ice cream.

Winter Activities

Sunrise to Sunset, daily admission fees still apply. Walk in access only. No boating. No ice fishing. No camping.

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