Union Reservoir is located at 461 County Road 26 in Longmont. The swim beach will be opened at 10 a.m. on July 28 and remains open daily until Aug. 12. For parking, guests of the reservoir have to ...

The Union Reservoir Swim Beach, at 461 County Road 26, was planned to open Memorial Day weekend. But, according to a city newsletter, low water levels have exposed parts of the lakebed that still ...