County Route S22 (California)
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County Route S22 begins at a junction with County Highway S2 in San Diego County and runs eastward as Montezuma Valley Road through the rural community of Ranchita. It enters Anza-Borrego Desert State Park and then descends for approximately 12 miles to the desert community of Borrego Springs, offering magnificent views of the Borrego Valley as it winds steeply down Montezuma Grade.
As it enters Borrego Springs, the highway turns right onto Palm Canyon Drive. In the middle of Borrego Springs, it passes through the only large traffic circle in San Diego County.
It continues east, changes its name to the Borrego-Salton Seaway, enters Imperial County and ends at a junction with State Route 86 in Salton City, a community on the banks of the Salton Sea.