Michigan Trail Riders Association helps develop and maintain horseback riding trails in Michigan. Results of the Association's efforts include the Shore to Shore Riding and Hiking Trail which winds from Empire on Lake Michigan to Oscoda on Lake Huron. A Shore to Shore Riding and Hiking Trail spur goes south from Grand Traverse County to Cadillac; a second spur goes north from the Frederic/Grayling area into the Pigeon River State Forest near Indian River and Mullet Lake.