Mineral King Road climbs from Highway 198 on a narrow, steep, winding route that is partly unpaved, often less than two lanes wide and without guardrails. Drive slowly; I’d aim to make the climb in daylight. Snow closes the road in winter, and the area generally opens in late May and stays accessible into October. Fuel up in Three Rivers: the nearest gas is about 30 miles and an hour and a half away.
Mineral King lies outside Sequoia’s main boundary and connects to the rest of the park by trails, so plan it as a separate valley outing rather than a quick detour from the main park roads.