The primary hiking season is usually from July through September; during this time, most of the snow from the previous year has melted, but new snow hasn't fallen yet. Early season hikers have to contend not only with the snowpack and icy slopes near the passes, but with streams swollen with snowmelt. Trail conditions are less demanding later in the season after the snowmelt concludes, and the weather generally remains pleasant for hiking through September. Weather during the hiking season is generally sunny and dry, but afternoon thunderstorms are not uncommon. The trail is used primarily by backpackers and dayhikers, but also by runners, trail riders, and pack trains. There is a shelter for hikers to stay at on Muir Pass, called the John Muir Hut, which is the only shelter on the trail.