Campus + Facilities | Junior Program

The Exploration Junior Program is located on the beautiful campus of St. Mark’s School in Southborough, Massachusetts. St. Mark’s is one of the country’s oldest and most prominent coeducational college preparatory schools, located on a picturesque campus with 250 acres of fields, woodlands, and ponds.

PDF Map of the Junior Program on the Campus of St. Mark's School Our map highlights the residential, academic, and recreational facilities available to students during the summer. The map also indicates the location of our on-campus informational meetings in the winter and spring.

The Junior Program has almost unlimited access to St. Mark’s extraordinary facilities. In addition to superb classroom spaces, there are art studios, a theatre, an excellent health center, and an award-winning science center. The school’s sports facilities rival those at many colleges and include a multi-million dollar sports complex, with eight playing fields, eight tennis courts, and a pool.

Southborough is 26 miles west of Boston, giving students a unique opportunity to enjoy one of the nation’s great historical, cultural, and educational centers. In addition to its proximity to Boston, St. Mark’s School is only 15 miles from Wellesley College, making it easy for Junior Program students to visit brothers and sisters at the Exploration Intermediate Program.


The Junior Program has access to: 8 playing fields; 8 outdoor tennis courts; 2 indoor basketball courts; a large swimming pool (no deeper than 6 feet and only 3.5 feet through most of its length, making it perfect for instructional swimming and water games); indoor performance spaces for student talent shows and productions; more than 600 lion images or sculptures hidden in and around the architecture; on-campus pond for canoeing, kayaking, and course study; a 26-mile proximity to Boston for weekend trips to popular sites such as the Museum of Science and the Boston Duck Tours.