Visit this link at the Idaho Parks and Recreation Website

Sacajawea Motor Sports Park

The Sacajawea Motorsports Park near Salmon, Idaho, offers a true natural terrain motocross track covering approximately 40 acres of public lands, which is leased to Lemhi County. The track is offers challenges for all skill levels – including a mini motocross track for 50cc racers. The track is open seven days a week. Directions: arriving south of Salmon, Idaho via U.S. Highway 28, travel north on Main Street and look for the intersection with North St. Charles Street, turn right onto N. St. Charles and follow the main road and signs approximately 2.6 miles to reach the park. Facilities include a vaulted toilet and ample parking. It’s important to check ahead when planning a visit as organized races are held frequently. Race days are usually listed on the Salmon Chamber of Commerce calendar.