This is a great (short) hike to get a peek at the Castor River Shut-Ins. It's only about a 1 mile loop to the Shut-Ins and back, but you can do more exploration off the trail if you wish. Also known as "Pink Rock", Amidon has lots to offer -- especially in the Summer when you can swim -- but also in the Spring and Fall if you are looking for a quick trip to get some fresh air. The trail itself is not paved, but it is fairly even terrain (not really stroller or wheelchair friendly). I see lots of folks walking their dogs too! My only complaint is that I wish it were longer.
It was a decent trail, runs along the Castor River Shut-ins. The trail is kind of hard to follow after you pass the first big pool though and is grown over a bit. I last went during the early summer though so I might try it this winter to see if the trail is better. There were also some primitive camp sites. Make sure you check in with the conservation dept before you camp there though. Good swimming hole there too!