 The headwaters and upper watershed of the creek west of California State Route 89 comprise the Sagehen Experimental Forest and Sagehen Creek Field Station, a research and education facility of the University of California, Berkeley.Below (east of) Highway 89, the Lower Sagehen Creek Hiking Trail follows the creek to its terminus at Stampede Reservoir.The trail is famous for wildflowers, especially in late May to early June, when fields of camas lilies bloom en masse, creating the illusion of a purple haze lying on the meadow.