This is a great masters meet that has been going on for yeeeeaaaaars. It’s a great supportive atmosphere. They have several adult class options. Check them out on their site: http://www.lavgym.com/portfolio.html
If you compete, you might even see the legendary 80 year old Ebba, winner of the 2008 Senior Olympics for her age division.
If you plan to complete in the meet, bring lots of water, it’s HOT there.