The Southern Valley Trail Riders Association Trail System is a non-profit club formed in the early 1970's.  The purpose for the Club was to encourage safe snowmobiling, act in the interest of snowmobile owners and land owners, preserve and promote winter sports activities, groom and maintain trails, foster the conservation and growth of area natural resources, and perform all lawful functions inherent in the successful operation of the club. 

The Southern Valley system is 200 miles of groomed snowmobile trail which links nearly every city in Richland County, the Fargo trail system to the north, the Minnesota system to the southeast, the South Dakota system to the south, the Dakota Magic Casino, and the new Milnor trail system to the west.  The trail system is groomed with funding from SND and members from over 200 families and businesses.