Conditions reports for this lake are available when logged in. Last Conditions Report for Union Reservoir: 07.05.24
Union Reservoir on FishExplorer has 446 historic conditions reports, 301 historic water temperature updates, 184 historic status updates, 300 historic water level updates, available to subscribers.
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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 tunnel to release water into the St Vrain River. According to Colorado water law, that made Union a tru... Log infor additional details...
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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.
