I am planning to climb Denali. Who are the permitted guide services?

If you mean climbing Denali (Mount McKinley) itself, the National Park Service says there are seven authorized commercial mountain guide services. Guided climbs must be conducted through one of these seven.

1. Alaska Mountaineering School (AMS) — Talkeetna, Alaska —
2. Alpine Ascents International — Seattle, Washington —
3. American Alpine Institute (AAI) — Bellingham, Washington —
4. International Mountain Guides (IMG) — Ashford, Washington —
5. Mountain Trip Alaska — Telluride, Colorado / Alaska operations —
6. National Outdoor Leadership School (NOLS) —
7. Rainier Mountaineering, Inc. (RMI) — Ashford, Washington —

The NPS's current mountaineering page confirms these are the seven authorized guide concessions for Mount McKinley and Mount Foraker.

A couple of important points

• You don't have to use a guide. Private expeditions can climb Denali without a commercial guide, provided they obtain the required NPS climbing registration/permit.
• For 2026, the Denali mountaineering special-use fee is $450 per climber, or $350 for climbers age 24 or younger at the start of the climb.
• The NPS says the climbing registration process involves payment plus a Special Use Permit application, with the application due at least 60 days before the requested departure date.
• Be careful about anyone offering to guide you who isn't on the seven-service list: the NPS explicitly warns that unauthorized guiding can result in the expedition being cancelled, removal from the mountain, citations, and potentially prosecution.

If you're actually considering booking a Denali expedition, I can also compare these seven services—cost, expedition length, success rates, guide-to-client ratios, prerequisites, and which are best for a first Denali attempt.

The National Park Service (NPS) authorizes only seven official concessionaire guide services to lead commercial climbing expeditions on Mount McKinley (Denali). Using an unauthorized or illegal guide service will result in your registration being voided, immediate removal from the mountain, and citations.

The officially permitted guide services are:

• Alaska Mountaineering School (Talkeetna, AK) – Local Alaskan base with deep-rooted expedition and instructional programs.
• Alpine Ascents International (Seattle, WA) – Renowned international high-altitude and Seven Summits expedition company.
• American Alpine Institute (Bellingham, WA) – Comprehensive mountain school utilizing structured, multi-guide team formats.
• International Mountain Guides (Ashford, WA) – Experienced global expedition provider running dedicated small-team Denali programs.
• Mountain Trip (Telluride, CO / Alaska) – Longtime Denali specialist with a high volume of guided ascents on the mountain.
• NOLS (National Outdoor Leadership School) (Palmer, AK) – Focuses heavily on comprehensive wilderness leadership and expedition skills.
• Rainier Mountaineering, Inc. (RMI) (Ashford, WA) – Major high-altitude guiding outfit with extensive expedition history.

You can verify details or check for any updates directly via the NPS Denali Mountaineering Guides Directory.

If you'd like, let me know:

• What climbing route you are considering (West Buttress, Muldrow Glacier, etc.)
• Your prior high-altitude mountaineering experience

I can help outline the training preparation or logistics timeline you'll need for the climb.

The National Park Service (NPS) authorizes only seven commercial guide services to conduct mountaineering expeditions on Denali (Mount McKinley). Utilizing an unpermitted guide service results in voided registrations, immediate removal from the mountain, and citations.

The official authorized concessionaires are:

1. Alaska Mountaineering School (AMS) — Based in Talkeetna, AK.
2. Alpine Ascents International — Based in Seattle, WA.
3. American Alpine Institute (AAI) — Based in Bellingham, WA.
4. International Mountain Guides (IMG) — Based in Ashford, WA.
5. Mountain Trip Alaska — Based in Telluride, CO.
6. National Outdoor Leadership School (NOLS) — Based in Palmer, AK.
7. Rainier Mountaineering, Inc. (RMI) — Based in Ashford, WA.

You can review official updates and safety policies directly on the NPS Denali Mountaineering Guides page.

Are you leaning toward a specific route (like the West Buttress) or do you need help comparing the pricing and schedules of these seven services?

If you mean commercially guided climbs of Denali (Mount McKinley), the National Park Service currently lists seven authorized guide services. These are the only companies permitted to lead commercial expeditions on Denali.

1. climbalaska.org — Talkeetna, Alaska
2. alpineascents.com — Seattle, Washington
3. alpineinstitute.com — Bellingham, Washington
4. mountainguides.com — Ashford, Washington
5. mountaintrip.com — Telluride, Colorado
6. nols.edu — Palmer, Alaska
7. rmiguides.com — Ashford, Washington

The NPS's current mountaineering guidance confirms that these seven are the authorized services. Going with an unauthorized guide can result in the expedition's registration being voided and the party being removed from the mountain.

A couple of important 2026 details

For the 2026 season, the Denali mountaineering registration fee is $450 per climber, or $350 for climbers age 24 or younger at the start of the climb. Climbers using one of the seven authorized concessions should coordinate registration/payment with their guide company.

The 2026 guiding rules also specify a maximum of 3 clients per guide (5 clients per guide for mountaineering courses).

If you're seriously considering Denali, I can also compare these seven services—cost, expedition length, success rates, guide-to-client ratios, prerequisites, and which is best for a first Denali attempt.

If you mean commercially guided ascents of Denali (Mount McKinley) itself, the National Park Service says there are seven authorized guide services:

• Alaska Mountaineering School — Talkeetna, Alaska
• Alpine Ascents International — Seattle, Washington
• American Alpine Institute — Bellingham, Washington
• International Mountain Guides — Ashford, Washington
• Mountain Trip Alaska — Telluride, Colorado
• National Outdoor Leadership School (NOLS) — Palmer, Alaska
• Rainier Mountaineering, Inc. (RMI) — Ashford, Washington

The NPS specifically states that these are the only seven companies permitted to guide on Mount McKinley, and that climbing with an unauthorized guide can result in your registration being voided, removal from the mountain, and a citation.

A couple of important Denali-specific points

For the 2026 season, the NPS requires every climber on Denali to register and obtain a mountaineering Special Use Permit. The 2026 fee is $450, or $350 for climbers age 24 or younger, and the application is due at least 60 days before the requested departure date. If you're climbing with one of the seven authorized services, the guide company can advise you on the registration/payment process.

Also, don't confuse the broader Denali commercial-use authorization system with Denali summit guiding: the park issues CUAs for many different activities, but commercial expeditions on Denali are specifically restricted to the seven authorized mountain guide concessions above.

If you'd like, I can also compare these seven Denali operators by price, expedition length, guide-to-client ratio, success rate, expedition style, and reputation and help you narrow it down to 2–3.

The National Park Service (NPS) officially authorizes only seven commercial guide services to lead expeditions on Denali (Mount McKinley). Using an unauthorized or illegal guide service will result in your registration being voided, immediate removal from the mountain, and citations or fines.

The seven permitted concessionaires are:

You can review the official regulations and announcements directly on the NPS Denali Mountaineering Guides page.

Are you leaning toward a particular route (like the West Buttress) or do you want help comparing the teaching style vs. departure availability of these seven services?

If you mean commercially guided climbs of Denali (Mount McKinley), the National Park Service currently lists seven—and only seven—authorized mountain guide services:

The NPS explicitly says these are the only companies permitted to guide on Mount McKinley, and unauthorized guiding can result in the climbing registration being voided and the party being removed from the mountain.

A useful distinction

You do not have to use a guide—private expeditions can climb independently. But if you hire a commercial guide, it must be one of the seven above.

For the 2026 season, NPS's current mountaineering rules also specify a maximum of 3 clients per guide (5 clients per guide for mountaineering courses), with a total group size generally capped at 12.

If you're deciding among these seven, I can also compare them for Denali specifically—success/experience, expedition length, cost, group size, guide-to-client ratio, and reputation—and tell you which 2–3 I'd shortlist.

The National Park Service (NPS) strictly limits commercial mountaineering on Mount McKinley (Denali). There are currently only seven officially authorized and permitted concessionaire guide services permitted to operate on the mountain. [1][2]

Using an unpermitted or unauthorized guide service is illegal; doing so will result in your registration being voided, being removed from the mountain, and receiving a citation. [1]

The seven authorized Denali guide services are:

• Alaska Mountaineering School (AMS): Based locally in Talkeetna, Alaska, specializing heavily in Alaskan range logistics and expedition courses.
• Alpine Ascents International: Well-known international high-altitude expedition operator.
• American Alpine Institute (AAI): Offers comprehensive expedition training and guided climbs on Denali.
• International Mountain Guides (IMG): Conducts major global and Denali-specific high-altitude climbs.
• Mountain Trip: Frequently operates Alaska-focused and Denali West Buttress expeditions.
• NOLS (National Outdoor Leadership School): Offers intensive mountaineering expedition courses and leadership training on the peak.
• RMI Expeditions (Rainier Mountaineering Inc.): Renowned Pacific Northwest and global guide service with an established Denali program. [1]

You can verify details or check for any updates directly via the NPS Denali Mountaineering Guides Page.[1]

If you'd like, let me know:

• What route you are considering (West Buttress, Muldrow Glacier , etc.)
• Your prior mountaineering experience (e.g., Rainier, Aconcagua, or 6,000m+ peaks)
• Whether you need help comparing logistics or training prerequisites for these operators

I can help you narrow down the best fit for your climb.

If you mean climbing Denali (Mount McKinley) itself via the standard West Buttress/other routes in the historic park area, the National Park Service currently lists seven authorized guide services:

1. Alaska Mountaineering School (AMS) — Talkeetna, Alaska
2. Alpine Ascents International (AAI) — Seattle, Washington
3. American Alpine Institute (AAI) — Bellingham, Washington
4. International Mountain Guides (IMG) — Ashford, Washington
5. Mountain Trip Alaska — Telluride, Colorado / Alaska operations
6. National Outdoor Leadership School (NOLS) — Alaska programs
7. Rainier Mountaineering, Inc. (RMI) — Ashford, Washington

The NPS explicitly says these seven are the only companies authorized to guide on Mount McKinley; using an unauthorized guide can result in removal from the mountain and citation.

One important distinction

Denali has a somewhat unusual permitting system. The seven above are the authorized mountaineering concessioners for Denali's main climbing area. Separately, the NPS issues Commercial Use Authorizations (CUAs) for guided mountaineering/climbing in certain post-1980 park additions and preserve areas. Those CUA operators aren't necessarily authorized to lead an expedition on Denali itself.

For the 2026 season, the NPS mountaineering registration fee is $450 per climber ($350 for climbers 24 or younger), and registration must be completed at least 60 days before the requested departure date.

If you're deciding among the seven, I can also compare them for Denali specifically—cost, expedition length, guide-to-client ratio, success/experience, and which are best for a first Denali attempt.

The National Park Service (NPS) strictly limits commercial mountaineering on Denali (Mount McKinley). Currently, there are only seven authorized concessionaire guide services permitted to legally lead climbs on the mountain.

Using an unauthorized guide service is illegal; if caught, your registration will be voided, you will be removed from the mountain, and you will be issued a citation.

The seven permitted operators are:

1. Alaska Mountaineering School – Based locally in Talkeetna, Alaska, specializing in comprehensive mountaineering courses and expeditions.
2. Alpine Ascents International – Offers scheduled guided expeditions on Denali's standard West Buttress route.
3. American Alpine Institute – Known for rigorous instructional elements and structured team ratios.
4. International Mountain Guides (IMG) – Provides large-team support structures and experienced high-altitude leadership.
5. Mountain Trip – Locally rooted in Colorado/Alaska with strict lead-guide experience requirements.
6. NOLS (National Outdoor Leadership School) – Focuses heavily on an extended, educational, wilderness-leadership expedition format.
7. Rainier Mountaineering, Inc. (RMI) – Operates guided climbs with flexible scheduling and extensive logistical support options.

(Note: While air taxis like Talkeetna Air Taxi and K2 Aviation are essential for flying you and your gear onto the glacier, they are permitted air carriers, not climbing guide services.)

Are you planning to tackle the West Buttress route , and do you need help comparing the group sizes or itineraries of any of these seven operators?