How to prepare for a 50-mile walk in San Diego?
I'm planning to attempt a 50-mile walk from Rancho Bernardo to San Ysidro and I want to know how to adequately prepare for it. I've already learned my lesson the hard way by not considering the closure of Kearny Villa Rd and taking a detour on Genesee, which ended up being a 33-mile walk. I'm looking for advice from people who have completed long walks/jogs in San Diego.