Explorer Middle School

The Explorer Middle School project's Phase 1 built a new 21,400-SF gymnasium and replaced the track. The new gymnasium building includes a new main gym, an auxiliary gym, a fitness studio, locker rooms and restrooms. The replacement track features new a new turf field, a rubberized track, and improved stormwater management and utilities. Explorer Middle School serves approximately 950 students in the Mukilteo School District. Cornerstone completed the project in time for the start of the 2025/2026 school year.