This is a great trail without the crowds. I took East Canyon to the top where it merges with the Weldon Canyon trail. 2.7 miles. Go .4 miles further to where the trail is fenced off. Here there is a sign for the Mission Point Trail. It's another 1.5 miles to Mission Point, on mostly level terrain. It adds 3 miles RT, but it's an easy 3 miles. I highly recommend taking this all the way to Mission Point, as it's more challenging the hiking up from O Melvany park, and the views are incredible.
Lor L. on Mentryville: Pico Canyon Trail
Great place to run!