Alabama issues annual passes on a park-by-park basis. Some parks do not issue annual passes; most of them because entry is fee.
Alaska no longer issues annual camping passes, but you can purchase parking passes and boat launch passes. A Disabled Veteran's Annual Camping Pass is also available for free, if you qualify.
Arizona offers a "Standard Annual Pass" annual passes that allows day-use access at all Arizona State Parks for pass holder and up to three additional adults in the same vehicle, with the exception of weekends (Friday-Sunday) and state holidays at the River Parks. A "Premium Annual Pass" day-use pass is also available, and allows park access to three more people in the same vehicle. A Disabled Veterans Annual Pass is also available at no cost. Annual passes may be purchased at any Arizona state park.
Arkansas does not issue annual passes. Fee vary from park to park, some being entirely free, other having parking fees, and some having fees to use certain facilities (boat launch, swimming pool, etc.). Look up the specific park you want to know about on the Arkansas State Parks website.
Colorado's Annual Pass is valid for a full 12 months after you purchase it, not just for the calendar year. In addition to the standard pass, there are special passes for elderly, disabled, and low-income peoples.
Connecticut offers a special seasonal pass that allows unlimited vehicle access to any state park or recreation area that has a parking fee for no extra charge for the entire calendar year the pass was issued. Seasonal passes are available to bothin-state and out-of-state residents.
The passes may be obtained at a park's regional headquarters, or at State Park and Forest Recreation Area entrance stations during hours when parking fees are in effect.