When you're at Black's beach, see how surfers go back.

They come thru Salk Instute Rd (as I recall, it's long time ago, or Torrey Pines Sceni Dr), all way to the end, there is a parking lot (on dirt) on left side. (On the right side, it's glider port.) They go down the cliff, 5 min, less than a quarter mile. But it's tough.

Most people park (free) on La Jolla Farmers Rd. The entrance is tough to find first time.There is a paved road going down, with a chain to stop average drivers. But bikers and walkers can pass, which leads to the southmost part of the beach. When you're at Black's beach,just going south all way to the end and it's easy to find the way.