The Eräsaari Lean-to is in Hirvaa, on Iso Eräsaari Island in the Kemi River, around 18 km south of Rovaniemi. The log-built lean-to is on a small hill in the southern tip of the island. It features a campfire site with log benches, a woodshed, outhouse and waste bin. In the summer, you can access the island by boat. In the winter, you can try skiing or snowshoeing to the lean-to. The ski trail begins at the Hirvasoja Lean-to and continues on the ice of the Kemi River. Another ski trail comes from Muurola to the tip of the island.