The Orange Beach Parade started as a loose confederation of large and small groups that wanted to parade by the beach. The city of Orange Beach stepped in and took over the parade's planning. It's still open to participation by just about anybody, even groups outside of Orange Beach.
The Mystical Maids of Miram and the Mystics of Pleasure contribute to the parade, as do groups from Foley to Perdido Key. Even groups that parade in Gulf Shores earlier in the day move up the road to be in the Orange Beach procession.
Visit https://www.orangebeachal.gov/427/Mardi-Gras for the full parade route and timeline.