Keystone spreads 3,148 acres (1,274 hectares) over three linked mountains near Dillon, Colorado, with 131 runs falling from a base at 9,280 ft (2,828 m) to a summit at 12,410 ft (3,782 m), a vertical of 3,130 ft (954 m). Intermediates take 39 per cent of the terrain, followed by 30 per cent advanced, 19 per cent expert and 12 per cent beginner, so the mountain is steeper than its family image suggests. Roughly 235 inches of snow falls in a typical season. Gondolas and six-person chairs carry skiers up Dercum Mountain, with North Peak and the Outback sitting beyond it.

Dercum Mountain holds the gentler cruising, and Schoolmarm is a green run of about 3.5 miles, the longest at the resort, winding back to the base. North Peak is known for long bump runs suited to intermediate and advanced skiers, while the Outback, the furthest and tallest of the three peaks, is where skiers go for powder turns and tree skiing. Five bowls (Independence, Bergman, Erickson, North and South) add high alpine terrain, and a cat shuttle from North Peak serves Bergman and Erickson. Keystone runs the largest night skiing operation in Colorado, and A51 is its terrain park on Dercum Mountain. It suits families, mixed-ability groups and advanced skiers keen to explore the Outback.

The 2025-26 season at Keystone ran from 24 October 2025 to 20 April 2026, a roughly twenty-six-week season supported by average annual snowfall of around 235 inches. Keystone traditionally opens earlier than many Colorado resorts, and this extended season reflects that early-opening tradition alongside reliable late-season conditions.

Midwinter, from December through February, typically brings the most consistent conditions across Keystone's three mountain areas. As an Epic Pass resort within the Vail Resorts network, Keystone draws substantial visitation from Epic Pass holders alongside families specifically seeking the resort's extensive night-skiing programme and varied, intermediate-weighted terrain.

Keystone's night-skiing operation, among the most extensive in Colorado, continues to draw strong evening visitation throughout the season. School holiday periods bring substantial family visitation given the resort's approachable terrain mix and dedicated programming. Weekend crowds draw heavily from the greater Denver metropolitan area.

Specific event programming beyond standard operations and night skiing is not confirmed in available resort information. Since Vail Resorts' 1996 acquisition, Keystone has continued building on more than five decades of history since its 1970 founding by Ralston Purina. The resort's three-mountain terrain variety and family-friendly character remain central to its seasonal appeal.