Activities at Union

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Special Events

Triathlons  -  Access to the Reservoir may not be possible until after 11:30 a.m.

  • Dates:   May 20, July 30, September 24, 2017

Kinetics Sculpture Race & Festival  -  Season passes are not valid for Kinetics - $10.00 Special Event Fee

  • Date:    June 24, 2017

Full Moon Paddle - Season passes are not valid for Full Moon Paddle - $8.00 per person Special Event Fee

  • Dates:  July 9, August 7, September 6, October 5, 2017, 7:00 pm - 10:00 pm

Bring your own board or reserve online at:


Closed for the season.

Water Conditions

Please contact the Union Reservoir Office for current information.

Paddleboard & Kayak Rentals

Rocky Mountain Paddleboard offers rentals of paddleboards and kayaks at Union Reservoir. Please visit their website to make a reservation and find additional information.

Sailing Club

Union Sailing Club is one of Colorado's largest and most active sailing clubs with weekly racing in the spring, summer, and fall. Several regattas, social events, youth activities, and clinics open to the general sailing public are also hosted each year. Instruction is also offered. Club boats are available on a limited basis for rental to experienced sailors. For more information please go to the Union Sailing Club website


Union Reservoir is open for camping the first Friday in May and will end for the season on the last Saturday in October.  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. Please note: Reservations are non-refundable.  Check-out time is noon.  Alcohol is prohibited.union-camping

  • During the Memorial Day weekend, camping will be available from Friday, May 26 through Sunday, May 28.
  • For Independence Day, camping will be available from Friday, June 30 through Monday, July 3.
  • During the Labor Day weekend, camping will be available from Friday, September 1 through Sunday, September 3.

Camping will not be permitted weekdays, Sunday through Thursday nights, with the exception of pre-approved Scout groups who are using the Scout Circle. For additional information please contact the Union Reservoir Office.

Campsite Reservations


Camping reservations can only be made online.  

Dog Off Leash Area

A dog off leash 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 Reservoir is fast becoming one of Colorado's finest Walleye fisheries. Walleye 17 to 24 inches are common. In recent years, Union Reservoir has become the hotspot for fly fishermen who enjoy the thrill of catching the hard fighting Carp. In addition, a healthy population of Trout, Crappie, Catfish, Bass, Sunfish, Wiper 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.


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. union-playground

For a fee of $75.00 a day, you may reserve the main picnic area or the shelter (additional gate fee per vehicle is required). There are picnic tables and barbecues set up in prime locations for use as well. Beverages up to 3.2% alcohol are permitted in the main picnic area or the shelter with a permit. The fee for an alcohol permit is an additional $75.00. Contact the Union Reservoir Office to reserve.  Reservations will be accepted beginning March 1.


Swim Beach

Union Reservoir's sandy beaches provide a gathering spot for young and old alike. Lifeguards are stationed at the beach for safety. Swimming is allowed during posted hours only (see Hours). 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.

Open Water Swim

Swimming outside of the designated swim beach is considered open water swimming; it is only permitted during posted Open Water Swim hours when lifeguards are on duty (see Hours).  Union Reservoir season passes or recreation facility passes are NOT accepted as a substitute for Open Water Swim (see Fees).

Please note: for the safety of all, Open Water Swims are exclusively for open water swimmers. Children and spectators are NOT allowed in the water to allow lifeguards to guard without distractions. Open Water Swim parking is available in the paved parking lot. Do not park along the beach in the kayak / canoe parking area.


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

Winter Activities

During winter, Union is open from sunrise to sunset. Daily admission fees still apply, and access is limited to walk-in. No boating, ice fishing, or camping is allowed during winter.

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