Because roads in these parks are narrow, winding, and steep, longer vehicles often cross the double yellow line and pose a danger to other drivers. Because of this, advisories are in place on some park roads. Drivers will be held responsible for any hazardous conditions caused by their actions. Follow the recommendations below for your safety and the safety of others.
The 16-mile section of the Generals Highway leading from the Sequoia park entrance at Hwy 198 to the Giant Forest sequoia grove was built in the early 1920s and can be difficult to navigate for longer vehicles.
- Vehicles longer than 24 feet (7.3 m) are not advised between the Foothills Visitor Center and Potwisha Campground in Sequoia National Park.
- Vehicles longer than 22 feet (6.7 m) are not advised on the stretch of road between Potwisha Campground and the Giant Forest Museum in Sequoia National Park. Highway 180, the northern entrance to these parks, is the preferred route for these longer vehicles. This limit applies to tow trucks, as well.
Crystal Cave Road
Vehicles longer than 22 feet (6.7 m) are prohibited on Crystal Cave Road. The road is open during cave tours and is gated each night after the last tour. Crystal Cave is generally open from late May through late October, weather permitting.
Mineral King Road
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 there. It's open from late May through the last Wednesday of October, weather permitting.
Moro Rock / Crescent Meadow Road Length Limit
Single vehicles longer than 22 feet (6.7 m) and towed units are prohibited during shuttle season, May through Labor Day weekend. In summer, park vehicles longer than 22 feet (6.7 m) at Giant Forest Museum and take a park shuttle. In winter, the road closes to cars until Memorial Day weekend in late May (earlier, if snow melts).
Panoramic Point Road
RVs and trailers are prohibited on this extremely narrow and winding road. It closes for the winter once snow falls, and reopens by Memorial Day weekend, or earlier if snow has melted.