Most trail heads in the Adirondacks will have a trail head register. It can be at a kiosk or a simple post with an attached wood case holding the register. Sometimes the register is right at the trail head but it can also be several yards or more down the trail.
Take the time to sign your name, how many people you are traveling with, length of time you will be gone and your destination/route you will be traveling. This should be done whether you are day hiking or backpacking.
Rangers check the register and it also gives information in the event you do not return due to an injury or if you become lost. Park Rangers will know how long you were gone and where your general location would be. Also remember to sign out.
When hiking and backpacking in the High Peaks Wilderness area of the state park, there are rules and regulations that must be followed. See the photo for the rules. They are enforced by park rangers. Signs like this can be found out some trail heads. However, even if a trail head does not have these rules posted, they are in effect, so be familiar with them.