New to the board, first post here.
I haven't heard of the 20-20 Club before. I got one at Lake Almanor
(Plumas County, California) in 2006, around 20"-21" Rainbow on a size 22 mayfly dry. This is a good pattern in the channel where the NF Feather River enters the lake. The fish was not very heavy for 20" and one of the locals gave me the nickname "Snake" in honor of the skinny trout. I hope that fish has gained some weight since I released it.