Colorado's premises liability statute creates a three-tiered framework that is unique among Midwest and Mountain West states. Under C.R.S. § 13-21-115, the duty of care a Colorado landowner owes to someone injured on their property depends entirely on the visitor's classification: (1) invitees — those invited for the owner's economic benefit or as members of the public where the land is held open to the public, who receive the highest duty (reasonable care); (2) licensees — social guests or others on the land with permission but without an economic nexus, who receive a more limited duty (warning of known dangers); and (3) trespassers — who in most circumstances receive only a duty not to willfully or deliberately injure them (except for children under the attractive nuisance doctrine). This categorization system matters enormously for Colorado premises liability claims — a social guest at a private party who slips on a host's icy deck is a licensee, not an invitee, and the host's duty is narrower. A customer at a Denver restaurant who falls in a parking lot is an invitee, and the restaurant owes a duty to discover and eliminate unsafe conditions or to warn of them.
Colorado's ski industry generates a distinct body of personal injury law under the Colorado Ski Safety Act of 1979 (C.R.S. § 33-44-101 et seq.). Colorado hosts 31 ski areas — including Vail (the most visited ski resort in North America by skier visits), Breckenridge, Keystone, Copper Mountain, Steamboat Springs, Telluride, and Aspen — collectively generating more than 12 million skier visits per year. The Ski Safety Act codifies the doctrine that skiers and snowboarders assume the "inherent risks and dangers of skiing" as defined in § 33-44-103 — including: variations in terrain, surface conditions (ice, moguls), collisions with natural objects (trees, rocks), and the actions of other skiers. Ski resorts are NOT liable for accidents caused by inherent risks. This limitation means that ski resort personal injury claims in Colorado require the plaintiff to demonstrate that the ski area's negligent conduct — not an inherent risk — caused the injury. The line between an inherent risk (icy patch on a groomed run) and a ski area's negligence (failed equipment, inadequate warning of closed trails, improperly marked hazards) is the central contested issue in Colorado ski injury litigation.
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