I refer to San Diego's Trans-County Sea to Sea (Salton to Pacific). Not finished yet, but neither was the Bay Rim Trail (or whatever it's called, I already forget).
In fact, I think for my next little projecty (in the spirit of my around-the-Bay run) I'm going to let my many thousands of readers vote. Should I:
a) Run around the seldom-referred-to San Diego Bay
b) Run some chunk of the Pacific Crest Trail
c) Run the bad boy referred to at the start of this post
d) Run the whole San Diego Coast (about 57 miles; IMHO, the most boring project mentioned here)
e) Some other program of devious intent to be suggested by readers