2026 Harris Grand Mariner 250

The 2026 Harris Grand Mariner 250 is a 25-foot tritoon pontoon powered by a single 400-horsepower Mercury engine. The redesigned hull features sweeping lines and a sloped profile, combining modern styling with functional pontoon performance. The aluminum construction provides durability across freshwater and coastal use.

The boat's interior emphasizes comfort and control. Soft-touch vinyl seating and upholstered furniture create a welcoming cabin space. The helm features a C-Zone digital control system paired with Simrad touchscreen navigation displays, allowing intuitive operation of engine and onboard systems. Premium audio comes from a JL Audio sound system, while integrated LED lighting packages—including RGB accent lighting—enhance ambiance throughout the boat.

Practical equipment rounds out the package. Navigation, entertainment, and helm functions all integrate through modern electronics, and the lighting system provides functional and decorative illumination. The tritoon design delivers the stable platform and shallow-draft capability typical of high-performance pontoons, suitable for watersports and cruising alike.