sentences:  A dirt road leads to a ranger station, parking and horseback or hiking trails.The trail to Bluebird Lake and Ouzel Lake follows the North St. Vrain Creek (which is a tributary of the South Platte River) passing Calypso Cascades and Ouzel Falls along the way, leading to Ouzel Lake and Bluebird Lake.Both Ouzel Falls and Ouzel Lake are named after a North American species of bird, "Cinclus mexicanus", also known as a dipper.