Most visitors go to the northern end of the park, which has a small lake, pond, and several short trails on surrounding hillsides. The better place for trail running, however, is in the southern part of the park, on Hastain Trail.

Beginning from a roadside parking area, Hastain Trail climbs a curvy fire road, crossing brushy slopes with a view over the canyon bottom. It gets higher, winding through a side canyon then ascending a ridge to a highpoint. From the top, you can see in all directions, over the canyon and hills beyond, even all the way to West Los Angeles and the ocean.

Complete the loop by backtracking down the ridge, then veering off the fire road to a steeper and narrower trail that switchbacks downward. It ends at a grassy picnic area, which you’ll cross to meet the road and return to your car.

Sources: https://mrca.ca.gov/parks/park-listing/franklin-canyon-park/