North of Sun Valley on the road to Stanley and described by Snow Country as arguably the best in the United States, the cross-country skiing network known as North Valley Trails stretches for 22 miles between Ketchum and Galena Lodge and offers 130 km of skiable terrain The North Valley Trails is an affordable, family based system that combines a blend of natural beauty and athletic challenge with varied terrain that wanders along streams, through open meadows, and spans the Boulder Mountain range. Plan to spend the day investigating the routes that climb through the pine forests.
The groomed Harriman Trail makes up the backbone of the system stretching 30km from the SNRA HQ north of Ketchum to Galena along the scenic Wood River parallel to SR75. It climbs 1000 feet along the way through snow covered meadows and thick pine forests.
Along this route, there are several side trails including North Fork (4km loop), Billys Bridge (8km loop), and Praire Creek (7.5km loop).
To reach the North Fork Trailhead from the intersection of 1st Street and SR 75 in Ketchum, go north on SR 75 for 8.1 miles. Turn right on NFD 146 (North Fork Rd) to the Sawtooth National Recreation Headquarters. Parking is right away.
Overall, North Valley Trails is the 13th most popular cross country ski area of all 43 Nordic ski destinations in Idaho.