Mono Lake itself is estimated to be at least 1 million years old. Over time the salts and minerals in the water have become too concentrated for most species to survive. However, the indigenous brine shrimp and flies attract millions of migratory birds and waterfowl. Most tourists come to see the tufa, spires and knobs formed of calcium carbonate that were exposed as the lake's water level dropped. Note: Tufa, pumice and obsidian are protected by state and federal laws and may not be collected or damaged.
Many basin roads are unsuitable for conventional vehicles; off-road driving is not permitted. Self-guiding nature trails and interpretive signs are at the South Tufa and Panum Crater day-use areas. Guided tours are available; phone for schedule.
The scenic area is open daily 24 hours. The visitor center on US 395, a half-mile north of Lee Vining, is part of the Mono Lake Ranger District, which covers the June Lake Loop Recreation Area, Mono Basin, Lee Vining Canyon and Tioga Pass. Phone for schedule. Free. South Tufa $3; free (ages 0-15). For more information contact Mono Basin National Forest Scenic Area Visitor Center, P.O. Box 429, Lee Vining, CA 93541; phone (760) 647-3044.