I have a few days in/around San Diego in April, are there any good options for riding in the area? I’ve found Mt Wilson in LA (but the traffic will be awful) or Noble Canyon.

Any others?

I love San Diego, one of my favourite cities.
I normally just use the roads/cycle ways and head up towards La Jolla and back via Cabrillo Point, some great views along the way!
Alternatively, you can head off east into the hills, there are some lovely rides that way.
But I’ve never been mountain biking out there, sorry