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Cathleen Stone Island Outward Bound School

Sparking lifelong growth through challenge outside.

Our Programs
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The image shows a tall wooden structure, likely part of an adventure course, with ropes and platforms. Several people wearing helmets are standing on a grassy hill, possibly waiting their turn. The sky is clear and blue, suggesting a sunny day. The overall scene conveys a sense of outdoor activity and adventure.
The image shows a group of people standing in the water, posing for a photo. They are wearing matching green shirts and holding shovels. They appear to be working on a project together, possibly related to environmental conservation or cleanup. The background includes a body of water and a clear sky.
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About CSIOBS

Since 1833, we’ve been a beacon of learning in the heart of Boston Harbor. Surrounded by salt marshes, forests, and shorelines, we help young people unlock lifelong potential through hands-on learning and connection to the natural world.  

Alongside the international network of Outward Bound Schools, we’re launching the next generation of compassionate leaders and building more connected, resilient communities.   

Where We Learn

One of the most ecologically diverse islands in Boston Harbor, Cathleen Stone Island is home to mature forests, meadows, freshwater and marine wetlands, and salt marshes. In this outdoor classroom, our students build the foundation for their future: courage, collaboration, and compassion for themselves, each other, and the environment.

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Our Story

Who We Serve

We provide transformational learning experiences for aspiring leaders of all ages. While we primarily serve youth in middle and high school, we also facilitate private programs for adult learners and business professionals.  

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Our Programs

What We Believe

Every child has unlimited potential. With courage, compassion, inclusion, integrity, and service, we help our students discover their voice, their confidence, and their power.  

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Our Approach
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Our Programs

Check out the work we’re doing.

The image shows three young boys wearing helmets, likely preparing for an outdoor activity like a ropes course or climbing. They appear to be looking at something with anticipation. The boy in the red hoodie is smiling. The background suggests a wooded area.

Connections

See our flagship program model - providing free experiential education for Boston Public Schools.

Connections
In the image, two people are working on a wooden structure outdoors. One person, wearing a green shirt and shorts, is standing and appears to be assisting the other person, who is bent over and also wearing a green shirt. They are likely building or repairing a dock or similar structure near a body of water.

Green Ambassadors

Learn more about our six-week summer environmental internship program for Boston's high-schoolers.

Green Ambassadors
The image shows a group of people preparing to kayak on a beach. They are near the water's edge, with kayaks in the foreground. In the background, there is a city skyline. The sky is overcast. The people appear to be getting ready for a kayaking trip.

Discovery

Dive into our summer expedition programs.

Discovery
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Outward Bound Professional

Read up on our programs for professional teams.

Outward Bound Professional
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Crew

What do we do during the winter? Check out our work in BPS classrooms.

Crew
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The image shows three people on a beach. One person is holding a piece of seaweed, while another is looking at it. The third person is smiling. They appear to be examining the seaweed. The background includes the ocean and a cloudy sky.

In the image, a man and a young girl are examining something on a rocky shore. The man, wearing a coral-colored shirt and sunglasses, is pointing at something with a small tool. The girl, with curly hair, is holding a container and a clipboard. They appear to be engaged in a scientific or educational activity, possibly exploring marine life.

The image shows a person waving their hand towards a boat on the water. The boat is filled with people and is moving towards a city skyline in the distance. The sky is blue with a few clouds.

The image shows a woman wearing a white helmet, smiling, and climbing a rope ladder. She appears to be enjoying herself. The background is blurred, suggesting an outdoor setting. The woman is wearing a grey t-shirt and a harness. The rope ladder is attached to a wooden structure.

The image shows a group of young people outdoors, likely at an adventure park. They are wearing harnesses and appear to be engaged in an activity like zip-lining or climbing. The person in the center is raising their hand, and everyone seems happy and excited. The background is filled with trees, suggesting a natural setting.

The image captures a serene beach scene at sunset. Three Adirondack chairs are silhouetted against the vibrant colors of the sky, with the ocean reflecting the fiery hues. The overall mood is peaceful and relaxing, suggesting a moment of tranquility and appreciation of nature's beauty.

The image shows a group of young people posing on a beach on a sunny day. Some are standing, while others are sitting on shoulders. They are all smiling and appear to be enjoying themselves. The background features a calm sea and a clear blue sky.

The image shows a group of people walking on a path surrounded by lush green foliage. They appear to be on a hike or nature walk. Most of them are wearing green shirts, and some have backpacks. The path is made of gravel or a similar material.

The image shows a person ziplining. They are wearing a red hoodie, black pants, a helmet, and gloves. They are smiling and have their arms outstretched, enjoying the activity. The background is a cloudy sky and some trees.

The image shows a person suspended in the air, likely engaged in a bungee jumping or similar activity. They are connected to a cable that extends towards a tall wooden structure. The sky is blue with some clouds. The wooden structure appears to be a tower with various platforms and supports.

The image shows a group of people sitting on a bench and a rock in a park. They are surrounded by trees with yellow and green leaves. Some of them are wearing backpacks. The scene suggests a relaxed and social gathering in a natural setting.

The image shows a group of seven people, likely volunteers, standing in shallow water. They are all wearing green shirts, boots, and holding shovels. They appear to be working on a beach or shoreline, possibly involved in a cleanup or environmental project. The reflection of the group in the water adds to the visual appeal.

Keep Up With CSIOBS

Read the latest stories from the island.

News & Press
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Dive In

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