Largely undeveloped, these areas of the park contain rough and isolated landscapes. Unimproved roads provide access deep into the Stronghold Unit. Perhaps spring and fall, when days are pleasant and nights are cool. The months of April and May are often rainy, although storms are possible year round, so always carry rain gear and extra clothing. Fall is generally cool and clear, but don't be caught unprepared for an early blizzard.
Serious cases require immediate medical attention, as they can be fatal.
Hot summer weather is often interrupted by severe thunderstorms, complete with large hail and lightning. If caught in a sudden storm, look for shelter from high winds. Avoid ridges, exposed areas, and isolated trees where lightning may strike. Only the hardiest hikers attempt backpacking trips in winter. Weather is unpredictable at best.