Lake Tahoe, located at Tahoe City in California, is a freshwater lake that was formed around two million years ago. The lake is fed by several small streams and rivers, with the Truckee River serving as the main outflow. The hydrology of the lake is closely monitored due to concerns about water quality and ecosystem health. Specific surface flow providers include the Upper Truckee River and the Taylor Creek Watershed, while the snowpack provides a critical source of water for the area's agricultural and recreational activities. The lake is surrounded by popular ski resorts and is a hub for outdoor recreation, including water sports, hiking, and biking, making it a major tourist destination. The lake also supports a range of agricultural activities, including vineyards and apple orchards.