| North Fork San Gabriel River | |
| Map Size: | 250 |
| Pushpin Map: | USA California |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location of the North Fork in California |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | California |
| Length: | 4.5miles |
| Discharge1 Location: | Camp Rincon, near the mouth[1] |
| Discharge1 Min: | 1.16cuft/s |
| Discharge1 Avg: | 6.6cuft/s[2] |
| Discharge1 Max: | 276cuft/s |
| Source1: | Near Falling Springs |
| Source1 Location: | Angeles National Forest, San Gabriel Mountains |
| Source1 Coordinates: | 34.2908°N -117.8403°W[3] |
| Source1 Elevation: | 3275feet |
| Mouth: | West Fork San Gabriel River |
| Mouth Location: | Near San Gabriel Reservoir |
| Mouth Coordinates: | 34.2414°N -117.8689°W |
| Mouth Elevation: | 1552feet |
| Basin Size: | 18.6sqmi |
The North Fork San Gabriel River is a tributary, 4.5miles long, of the West Fork San Gabriel River in the Angeles National Forest of Los Angeles County, California. The river originates at the confluence of Soldier Creek and Coldbrook Creek in the San Gabriel Mountains below the village of Falling Springs and flows down a steep canyon in a southerly direction to join the West Fork near San Gabriel Reservoir. The North Fork Canyon provides the route for SR 39, one of the main access roads to the Angeles Forest.
Crystal Lake, the only natural lake in the San Gabriel Mountains, is located above the headwaters of the North Fork in the Crystal Lake Recreation Area at an elevation of 5600feet. The area has campsites, trails and picnic areas and is one of the more popular sites in the Angeles National Forest.[4] [5]