One of our favorite state parks in Utah is only~45 minutes away from Salt Lake City! There are bison, antelope, deer, and many other animals that call this island home. On the west side of the island are extensive muds flats that give you one of the best sunset views in Utah. One of our favorite things to do on the island is hike Frary Peak which is the high point of the island. The top portion of the hike is a rocky scramble, but there are plenty of side trails to beautiful viewpoints during the hike.
As for the best season to visit the island, we are partial to winter due to the absolute lack of bugs and stunning contrast of the bison on fresh snow. Our 2nd favorite season is early spring before the bugs come out in full swarm! I wouldn't recommend visiting in late spring or summer as there are swarms of all kinds of biting bugs and the temps can be unbearable.