The Boundary Bay Marathon 2025 is a celebrated annual running event held in Delta, British Columbia, renowned for its scenic, flat, and fast course along the picturesque shoreline of Boundary Bay. Now in its 14th year, the event attracts runners from across the region and beyond, offering a welcoming atmosphere for both seasoned athletes and newcomers alike. The marathon is a certified Boston Marathon qualifier, making it a popular choice for those aiming to achieve personal bests or secure a coveted spot in Boston.

The event is more than just a race; it is a community celebration that supports a meaningful cause. A portion of the proceeds benefits Ronald McDonald House BC & Yukon, helping families in need. With staggered start times, a variety of race distances, and a supportive environment, the Boundary Bay Marathon is a highlight of the Lower Mainland's running calendar, providing an inclusive and memorable experience for all participants.

The Boundary Bay Marathon course is renowned for its flat, fast terrain, making it ideal for runners seeking personal bests or Boston qualifying times. The route follows a primarily gravel trail that runs parallel to the ocean shoreline, offering expansive views of Boundary Bay and the surrounding natural beauty. The out-and-back design ensures minimal elevation change, with the course being virtually flat throughout. Runners can expect a well-maintained surface, gentle ocean breezes, and the possibility of minor route adjustments due to ongoing nature-based enhancements in the area. The course is suitable for all levels, from beginners to elite athletes.

- Certified Boston Marathon qualifier
- Flat, scenic, out-and-back gravel trail along the ocean
- Supports Ronald McDonald House BC & Yukon
- Staggered start times for all distances
- Five race options: Marathon, Marathon Relay, Half Marathon, 10K, and 5K