AMC Boston 20s and 30s

Activity Type: Social | Local Socials
Difficulty: 2 - Relaxed
Trip Leader(s): Catherine Bentsen, Christopher Mastroianni, Jordan Lampert, Alexander DeLaney, Amy Liljestrand
Registration Type: Application
Please Click Here to RSVP: https://activities.outdoors.org/a5UVX000001EZgT
Register By: 9/10/2026
Audience: 20’s & 30’s

Description: Join AMC Boston 20s & 30s for the annual Three Mile Island (TMI) Weekend on September 11-13, 2026! This trip will offer priority registration to AMC members through July 31. If you are not a current AMC member, you may register after July 31.
What is Three Mile Island? AMC’s Three Mile Island (TMI) is set up as a rest and relaxation camp. Built on a tradition of simplicity, participants enjoy canoeing, kayaking, relaxing by their cabin, and playing games! Situated on an island of 43 rocky woodland acres, Three Mile Island on Lake Winnipesaukee offers a delightful recreational experience in the heart of New Hampshire's lake district. Sleeping consists of quaint 2-person cabins right on the water’s edge. Wake up to the sounds of loons and beautiful sunrises! Most meals are provided and are served family-style in a warm, social atmosphere. A great opportunity to escape modern stresses, campers agree to keep electronic devices in their own cabins, freeing themselves to enjoy nature, good food, and great company.
For more information, read through the FAQs , check out the Three Mile Island website , and get ready to sign up!
Important Information about Registration Three Mile Island is one of AMC 20s & 30s most popular trips. In order to accommodate the high demand, AMC is hosting two weekends: September 11-13 (50 spots) and September 25-27 (40 spots). The first trip (this one!) will give priority registration to AMC members for registrations prior to July 31.
When you register for this trip, include your AMC member number in the “Additional Information” section. If you register before July 31 and do not include your AMC member number, your registration will be canceled and your trip cost refunded.
How much does the trip cost? Trip costs are $273.02 per person for AMC members and $304.10 per person for non-members . The cost includes lodging in 2-person cabins (double occupancy), ferries to and from island, unlimited boat use (canoes, kayaks, paddleboards), meals (Saturday breakfast through Sunday lunch), and campfire snacks.
I am not an AMC member yet, how can I join? Anyone can become an AMC member! Membership helps promote AMC’s mission to “foster the protection, enjoyment, and understanding of the outdoors”. Your membership works to directly support land protection and conservation, trail maintenance, outdoors education and programming, environmental monitoring and more. Members also receive discounts on outdoors trips, AMC huts and lodges, and gear from the AMC Store. Annual membership is $25 for those under age 30, and $50 for individuals. More information about AMC membership is included here .
The trip is full, how can I join the waitlist? Email Kate ( katebentsen@gmail.com ) to add your name to the waitlist. The Outdoors Connector registration system does not have a built-in waitlist function for trips that require payment. If a spot opens due to a cancellation, the waitlist will be emailed to fill the spot on a first-come, first-served basis.
I can no longer go on the trip, how do I cancel? Email Kate ( katebentsen@gmail.com ) to cancel your registration. If you cancel on or before August 28, you will receive a full refund. If you cancel after August 28, you will receive a refund if we are able to fill your spot from the waitlist. If you cancel after September 7, you will not receive a refund. Refunds will be issued after the trip occurs.

Reminder: Please click the RSVP link above to register!

Activity Type: Social | Meetings
Difficulty: 1 - Accessible
Trip Leader(s): James Dempsey, Catherine Bentsen, Aaron Valentine
Registration Type: Registration
Please Click Here to RSVP: https://activities.outdoors.org/a5UUN0000028JHF
Audience: 20’s & 30’s

Description: Interested in learning more and getting involved with the inner workings of the AMC Boston 20s & 30s committee? Join our next steering committee meeting on Monday, September 14 from 7:00-9:00pm! Our September meeting will be held in person. Food will be served at 6:30pm before the start of the meeting. Meeting agenda and location will be sent to those registered for the meeting.
The 20s & 30s steering committee meets once a month to plan ongoing programs and larger events, discuss ways to encourage new membership and leadership in the Boston community, and update club policies in accordance with larger AMC guidelines. All meetings are open to the public, whether you would like to apply for a position or attend as a guest to learn more about our plans for the future.

Reminder: Please click the RSVP link above to register!

Activity Type: Social | Local Socials
Difficulty: 2 - Relaxed
Trip Leader(s): Catherine Bentsen, James Dempsey, Carly Hodes, Richard Rosenblum, Sara Rodriguez
Registration Type: Application
Please Click Here to RSVP: https://activities.outdoors.org/a5UVX000001FLBd
Register By: 9/24/2026
Audience: 20’s & 30’s; Adults

Description: Join AMC Boston 20s, 30s & 40s for the annual Three Mile Island (TMI) Weekend on September 25-27, 2026!
What is Three Mile Island? AMC’s Three Mile Island (TMI) is set up as a rest and relaxation camp. Built on a tradition of simplicity, participants enjoy canoeing, kayaking, relaxing by their cabin, and playing games! Situated on an island of 43 rocky woodland acres, Three Mile Island on Lake Winnipesaukee offers a delightful recreational experience in the heart of New Hampshire's lake district. Sleeping consists of quaint 2-person cabins right on the water’s edge. Wake up to the sounds of loons and beautiful sunrises! Most meals are provided and are served family-style in a warm, social atmosphere. A great opportunity to escape modern stresses, campers agree to keep electronic devices in their own cabins, freeing themselves to enjoy nature, good food, and great company.
For more information, read through the FAQs , check out the Three Mile Island website , and get ready to sign up!
Important Information about Registration Three Mile Island is one of AMC 20s & 30s most popular trips. In order to accommodate the high demand, AMC is hosting two weekends: September 11-13 (50 spots) and September 25-27 (40 spots). The second trip (this one!) will be open to an expanded audience of those in their 20s, 30s & 40s. There will not be a lottery this year; spots are first-come first-served. Please only register for one trip to allow others to experience Three Mile Island.
When you register, include your AMC member number (if applicable) in the Additional Information section.
How much does the trip cost? Trip costs are $273.02 per person for AMC members and $304.10 per person for non-members . The cost includes lodging in 2-person cabins (double occupancy), ferries to and from island, unlimited boat use (canoes, kayaks, paddleboards), meals (Saturday breakfast through Sunday lunch), and campfire snacks.
I am not an AMC member yet, how can I join? Anyone can become an AMC member! Membership helps promote AMC’s mission to “foster the protection, enjoyment, and understanding of the outdoors”. Your membership works to directly support land protection and conservation, trail maintenance, outdoors education and programming, environmental monitoring and more. Members also receive discounts on outdoors trips, AMC huts and lodges, and gear from the AMC Store. Annual membership is $25 for those under age 30, and $50 for individuals. More information about AMC membership is included here .
The trip is full, how can I join the waitlist? Email James (jdempsey256@gmail.com) to add your name to the waitlist. The Outdoors Connector registration system does not have a built-in waitlist function for trips that require payment. If a spot opens due to a cancellation, the waitlist will be emailed to fill the spot on a first-come, first-served basis.
I can no longer go on the trip, how do I cancel? Email James (jdempsey256@gmail.com) to cancel your registration. If you cancel on or before September 11, you will receive a full refund. If you cancel after September 11, you will receive a refund if we are able to fill your spot from the waitlist. If you cancel after September 21, you will not receive a refund. Refunds will be issued after the trip occurs.

Reminder: Please click the RSVP link above to register!

Activity Type: Hiking, Local Walks, & Trail Running | Hiking
Difficulty: 6 - Strenuous
Trip Leader(s): Ian Baker, Phuong Dinh, Valentina Harrison
Registration Type: Application
Please Click Here to RSVP: https://activities.outdoors.org/a5UVX0000018j2b
Register By: 9/12/2026
Audience: 20’s & 30’s

Description: Enjoy above tree line views and steep, scrambly trails? We will hike Mt. Madison via an irregular route, ascending via the Great Gulf Trail and Madison Gulf Trail, summiting Madison, and then descending via the Osgood Trail and Great Gulf Trail. Expect an approximately 10-mile lollipop loop hike with approximately 4,100’ of elevation gain on rough, steep terrain at a pace on the fast side of moderate.
NOTE: While quiet, strenuous, and fun for many, the Madison Gulf Trail is among the most difficult trails in the White Mountains. The AMC White Mountain Guide’s description of the trail is apt: “The section of this trail on the headwall of Madison Gulf is one of the most difficult in the White Mountains, going over several ledge outcroppings, boulder-strewn areas, and a rock chimney. The steep slabs may be slippery when wet, and several ledges require scrambling and the use of handholds. [...] The ascent of the headwall may require several hours more than the estimated time; parties frequently fail to reach the hut before dark due to slowness on the headwall.” Participants should also know that because the headwall more or less ascends a creek, the rocks are nearly always wet and are covered in slippery moss.
Participants absolutely MUST have recent (within the past 12 months) experience on other similarly-scrambly Terrifying 25 trails OR comparable experience (such as rock climbing). We will make no exceptions to this requirement, so please do not register for the hike if you do not meet this requirement. In addition, participants must be in excellent physical shape with recent experience hiking similar distances and elevation gain over comparable terrain and a robust cardio fitness regimen. This is NOT a suitable hike for building endurance or strength as a hiker. After registering for the hike, one of the leaders will reach out to you to schedule a short (~15 minutes) phone call to discuss your recent hiking experience and fitness to ensure you've met all of the prerequisites and that the hike is a good fit for you.
To address unforeseen challenges such as adverse weather, unacceptable trail conditions or excessive crowding, the planned trip destination, activity and/or meeting place and time may be modified. In that event, participants may elect to join in that activity or opt out. We will hold Sunday, September 27 a backup date for this hike if weather conditions prohibit us from hiking on September 26. Due to the potential danger of the Madison Gulf Trail in wet conditions, we will ascend via Valley Way if we expect the Madison Gulf Trail to be excessively wet.

Reminder: Please click the RSVP link above to register!