Southeast of Twin Falls near Kimberly, the Rock Creek Race Track has several tracks including a 1 mile motocross track, a 1 mile supercross track, and an 1/8th mile peewee track.
Take exit 182 off of I-84. Go southwest towards Twin Falls. Turn left (south) on 3600 E. Road. Go until you see the track.
Overall, Rock Creek Race Track is the 53rd most popular dirt bike trail of all 53 dirt biking rides in Idaho.