Near Medford in the Siskiyou National Forest, there are 130 miles of groomed snowmobile trails at elevations ranging from 1,300 to 6,300 feet.
A great place to start is the Pederson Snowpark. The Pederson Snowpark is located about 1/2 mile east of the Jackson/Klamath county line. Pederson is another informal snowpark (no permit required) with limited parking. The Pederson Snowmobile trail crosses the hwy just west of the snowpark. The Pacific Crest Trail crosses the hwy at the Pederson Snowpark also. It is designated and marked for nordic skiing from the snowpark north to the South Brown Mountain Shelter. Snowmobilers can reach the shelter via the Pederson and Hyatt/Lake OWoods trails.
Hyatt/Lake O Woods Trail - FS 8 (Easy, 32 miles): Connects Lake of the Woods and Hyatt Lake. South Brown Mountain Shelter is located about 1/4 mile south of the Hyatt/Lake OWoods Trail via a marked spur trail just a little ways west of the junction with the Brown Mountain snowmobile trail. The Shelter serves as a warming hut for snowmobilers and nordic skiers.
Pederson Trail - FS 8 (Easy, 11 miles): Alternate to Hyatt/Lake of the Woods Trail that features some good riding off the designated route in the Griffen Pass/Old Baldy area.