Near Newport, the Geophysical Trail System is a popular 6.6 mile trail system through rolling terrain and stands of fir and ponderosa pine, is located in a wildlife winter range area.
To reach the mountain biking trailhead from Newport follow U.S. Route 2 across the Pend Oreille River into Idaho and turn north on LeClerc Road (county road 9305). Continue on road 9305 for 7.5 miles to the intersection with Indian Creek Road. Turn east and continue on Indian Creek Road for 1.5 miles to trailhead.
Overall, Geophysical Trail System is the 49th most popular mountain bike trail of all 59 mountain biking rides in Washington.