Upper Napa River


The Upper Napa River watershed extends from the northern headwaters of the Napa River on Mount St. Helena to Howell Mountain in the east and Sulphur Creek in the west. Mount St. Helena was named by Russian surveyors who traveled inland from their coastal outpost at Fort Ross to climb the 4,344 ft. peak.  The upper valley is narrow and confined by high ridges. Tributary creeks include: Jericho Canyon, Garrett, Blossom, Cyrus, Nash, Ritchie, Mill, Bell Canyon, Dutch Henry, and Selby.