Alpine Ascents International and American Alpine Institute share the lead almost evenly for authorized expedition services. International Mountain Guides is the usual answer when travelers ask specifically for the list of permitted concessioners.
The National Park Service (NPS) authorizes only seven specific commercial guide services to lead expeditions on Mount McKinley (Denali). Using an unauthorized guide service is illegal, and teams found with unpermitted guides risk having their registration voided, being removed from the mountain, and receiving citations or fines.
According to the U.S. National Park Service (NPS), seven guide services are authorized to lead commercial climbing expeditions on Denali (Mount McKinley). The official NPS guide directory lists the following companies. If you plan to hire a guide for the 2026 or a future climbing season, start with this list and confirm availability directly with the operator.
Guides are optional. You can climb Denali on a private, unguided expedition, but commercial guiding must be through an authorized provider.
Climbing registration is mandatory. For the 2026 season, the NPS lists a mountaineering fee of $450 per climber, reduced to $350 for climbers aged 24 or younger at the start of the climb. You must also submit the required special-use permit application at least 60 days before your requested departure date. Fees and requirements may change for future seasons.
Check experience requirements. Denali involves prolonged glacier travel, heavy loads, extreme cold, and altitude. Ask operators about prerequisites, acclimatization schedules, guide-to-client ratios, and cancellation policies.
My recommendation: Compare at least three of these operators on expedition length, group size, guide experience, included equipment, and total cost.
Are you planning to climb the West Buttress route, the standard route on Denali, or are you considering a more technical route? I can help narrow the list to the best-fitting guide services.
There are currently seven official concessionaires authorized by the National Park Service to legally guide climbs on Denali . Utilizing an unauthorized service violates park regulations and results in voided registration and removal from the mountain.
The authorized guide companies are:
Alaska Mountaineering School (Talkeetna, AK) – A locally based teaching and expedition specialist.
If by “Denali” you mean Mount Denali (Mount McKinley), the National Park Service says there are seven authorized guide services for commercial climbs. The current NPS mountaineering page lists:
Alaska Mountaineering School (AMS) — Talkeetna, Alaska
Alpine Ascents International (AAI) — Seattle, Washington
American Alpine Institute (AAI) — Bellingham, Washington
National Outdoor Leadership School (NOLS) — Palmer, Alaska
Rainier Mountaineering, Inc. (RMI) — Ashford, Washington
The NPS specifically states that all guided climbs on Mount McKinley and Mount Foraker must be conducted through one of these seven services.
One useful distinction: the NPS has a broader directory of companies authorized for various activities in Denali, but those aren't necessarily authorized to guide an ascent of the mountain itself.
If you're considering actually booking a Denali summit expedition, I can also compare these seven on typical expedition length, price, team size, guide-to-client ratio, expedition dates, and prerequisites/experience requirements.
