Casaval Ridge

Avalanche Gulch is the standard and most commonly climbed route on Mount Shasta. It is a snow climb in the main season, with a straightforward line up the broad south side of the mountain. The route is heavily influenced by snow conditions and can involve firm snow, soft snow, or icy sections. The Red Banks and Misery Hill are the main named obstacles on the ascent. Objective hazards include rockfall, avalanche danger, and rapidly changing weather. In late season, the route can become more broken and require more careful route-finding.

The Clear Creek Route is a well-known alternative on the southeast side of Mount Shasta. It is generally less crowded than Avalanche Gulch and is often used when parties want a quieter ascent. The route is typically a snow climb, though conditions can vary widely by season. It involves long open slopes with route-finding required in poor visibility. Avalanche exposure and loose volcanic terrain are important hazards, especially lower on the mountain. The upper mountain can be windy and exposed near the summit plateau.

Hotlum-Bolam Ridge is a major north-side alpine route on Mount Shasta. It combines glacier and ridge climbing with long snow slopes and exposed upper-mountain terrain. The route is more committing than the standard south-side climbs and is affected by seasonal snow and ice conditions. Crevasse and cornice hazards may be present depending on the year. Route-finding can be complex in poor visibility or late season. It is a recognized classic for climbers seeking a more alpine ascent of the peak.

The Wintun Route is a documented alpine route on the northwest side of Mount Shasta. It is less commonly climbed than Avalanche Gulch but is established in climbing references. The route typically involves steep snow climbing and may include mixed sections depending on conditions. It is more remote and committing than the standard routes, with greater emphasis on self-sufficiency. Avalanche exposure and route-finding are important considerations. Upper-mountain weather and visibility can strongly affect the climb.