 Lost Gold Trails LoopThe Lost Gold Trails Loop ventures southwest along Highway A-2. It starts off the town of Dubois by the railway tracks and continues west over I-15 onto Idaho 22 to the old Highway 91 Junction till Spencer. Attractions include museums, mines and historic towns. |  Fort Henry Historic BywayThe Fort Henry Historic Byway marks the first white settlement in Idaho. The directions are too detailed (see link). Attractions include river access, monuments, sand dunes, game areas, historic ranches etc. |  Mesa Falls Scenic BywayThe Mesa Falls Scenic Byway, the shortest of this trip at only 29 miles long, starts and ends on US-20 forming an alternative scenic route. The southern end is at Idaho 47 and the northern end is at Route 294. |  Teton Scenic BywayThe Teton Scenic Byway begins at Idaho 31 at Swan Valley and through Idaho 32 and 33 ends at Idaho 47 at Ashton. Through its 69 miles length, there are several vantage points from which to view the splendid western skyline of the Teton range in neighbouring Wyoming. |