I've shot indoor winter postal leagues and NRA Sectional for yrs. They generally do postal for 22LR pistol , shotgun and rifle.
Than there are monthly sanctioned indoor matches, for pistol its a 90 shot bullseye, 60 Standard pistol and a 60 shot 10M Air Pistol. Matches for rifle too but most are junior events.
My club also does that NRA action pistol thing, others do Glock matches.
Lots of winter shooting esp if you have local ranges with indoor range.