Each winter, the network of trails and service roads at Fields Spring State Park is covered with snow and converted to groomed cross-country skiing trails. The trails, which include all difficulty levels, are mostly under the cover of pine and fir forests, except for the southern part of the Grande Ronde trail, which enters a large meadow with views of the intricate canyons of the Grande Ronde River and south towards Hells Canyon. Another highlight of the network is the climb to Puffer Butte, where there are more views as well as a warming hut. The park also has a sledding hill for those in your group not interested in skiing. Snowshoers and dogs are not allowed on groomed trails; however, there is also a snowshoe trail network in the park and they are allowed on the eastern part of the Grande Ronde Trail to the meadow south of Puffer Butte. A Sno-Park permit is required to park at the trailhead.