The saga of the East Fork chronicles a wild adventure of gold booms, mining towns, colorful old-timers and repeated natural disasters. The Indian petroglyphs, abandoned mines, old roads and bridges now leading nowhere are some remains of yesteryear. The river is more popular than ever and receives heavy visitation today.  

From its headwaters in the northern backbone of the San Gabriels, the East Fork begins at the confluence between Prairie Fork and Vincent Gulch and serpentines through a deep precipitous gorge before coalescing with other forks into the San Gabriel Reservoir.