Ash Mountain Entrance to Sequoia National Park
Highway 198 enters Sequoia National Park at the town of Three Rivers. Beyond the entrance station, the road is narrow and winding. Vehicles longer than 24 feet (7.3 m) are not advised between the Foothills Visitor Center and Potwisha Campground. Vehicles longer than 22 feet (6.7 m) are not advised on the stretch of road between Potwisha Campground and the Giant Forest Museum. This limit applies to tow trucks, as well.

Big Stump Entrance to Kings Canyon National Park
Highway 180 enters Kings Canyon National Park from the west via Fresno. Highway 180, the northern entrance to these parks, is the preferred route for these longer vehicles. Highway 180 is straighter, less steep, and wider.

Lookout Point Entrance to the Mineral King Area
If you’re heading to the remote Mineral King area of Sequoia National Park, look for the junction of Mineral King Road with Highway 198 in the town of Three Rivers, two miles before the Ash Mountain Entrance. This road is extremely narrow and winding and is unpaved in some areas. RVs and trailers are not advised and are not permitted in the campgrounds. It’s open from late May through the last Wednesday of October, weather permitting.Only trails connect Mineral King with the rest of Sequoia National Park.