That's what the Road Scholar people call the trip I'm going on this month. I've never been on one of their trips, but they're connected with Elder Hostel, so I imagine it'll be fine. This particular one is women-only, and starts in San Diego before heading into Baja California to see the whales as well as deserts and other stuff.
The whales we'll be visiting are Grey Whales, which spend the summer in the Bering Sea and other northern places, moving south when the ice forms. These whales reach about 45 feet and 35 tons; the females are generally bigger than the males.
There are several cool parts of this trip... the whales, of course, are close to the top of the list. Plus, I'm meeting the second son of my ex husband and his wife (he is the son of my ex and his wife, but I'm talking about meeting him and his wife. Clear?) for a tour of his ship (he's in the navy) and dinner. I've never met his wife so I'm looking forward to that. And while I've seen David as an adult, I still have trouble thinking of him as more than 12 or 13 so seeing him as captain will be great. Then, Len will be at home to water the plants, and protect the house from any burglars.
And... I've never been in that part of Mexico, and I always like visiting Mexico. I assume that it will be warmer there, but I don't think it gets very hot at that time of the year.