Great Basin Divide in the context of "Lake Lahontan"

A continental divide is a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea, and the basin on the other side either feeds into a different ocean or sea, or else is endorheic, not connected to the open sea. Every continent on Earth except Antarctica (which has no known significant, definable free-flowing surface rivers) has at least one continental drainage divide; islands, even small ones like Killiniq Island on the Labrador Sea in Canada, may also host part of a continental divide or have their own island-spanning divide.The endpoints of a continental divide may be coastlines of gulfs, seas or oceans, the boundary of an endorheic basin, or another continental divide. One case, the Great Basin Divide, is a closed loop around an endorheic basin. The endpoints where a continental divide meets the coast are not always definite since the exact border between adjacent bodies of water is usually not clearly defined. The International Hydrographic Organization's publication Limits of Oceans and Seas defines exact boundaries of oceans, but it is not universally recognized. Where a continental divide meets an endorheic basin, such as the Great Divide Basin of Wyoming, the continental divide splits and encircles the basin. Where two divides intersect, they form a triple divide, or a tripoint, a junction where three watersheds meet.

Whether a divide is considered a continental divide distinguished from other secondary drainage divides may depend on whether the associated gulfs, seas, or oceans are considered separate. For example, the Gulf of Mexico is considered separate from the Atlantic Ocean, so the Eastern Continental Divide separates their respective watersheds. But the Sea of Cortez is usually not considered separate from the Pacific Ocean, so the divide between the Colorado River watershed, which drains to the Sea of Cortez, and the Columbia River watershed, which drains to the Pacific Ocean, is not considered to be a continental divide.

Carson Pass is a mountain pass on the crest of the central Sierra Nevada, in the Eldorado National Forest and Alpine County, eastern California.

The pass is traversed by California State Route 88. It lies on the Great Basin Divide, with the West Fork Carson River on the east and the South Fork American River on the west.

The Sierra Crest is a roughly 500 mi (800 km) generally north-to-south ridgeline that demarcates the broad west and narrow east slopes of the Sierra Nevada and that extends as far east as the Sierra's topographic front (e.g., Diamond Mountains and Sierran escarpment). The northern and central Sierra Crest sections coincide with over 300 mi (480 km) of the Great Basin Divide, and the southern crest demarcates Tulare and Inyo counties and extends through Kern County to meet the Tehachapi crest. The Sierra Crest also forms two paths (bifurcates) around endorheic cirques (e.g., Cup Lake) between the west and east Sierra slopes.

Theodore Solomons made the first attempt to map a crest route along the Sierras. He was instrumental in envisioning, exploring, and establishing the route of what became the John Muir Trail from Yosemite Valley along the crest of the Sierra Nevada to Mount Whitney.