Fed by snowmelt from the Warner Mountains, the Pit River creates an oasis for wildlife in the high desert of northeastern California — Modoc National Wildlife Refuge. The 7,000+ acre refuge was established in 1961 to manage and protect migratory waterfowl. Funds available from the Migratory Bird Hunting Stamp Act helped purchase this refuge, which is located just south of Alturas, California. Tour Route and Walking Trail: Open 365 days a year from sunrise to sunset. Office Headquarters and Visitors Center: Open Monday-Friday 7:00 – 3:30 except on holidays.