The Boundary Run is a marathon (~26.2 miles) and half-marathon (~13.1 miles) race that takes participants around the boundaries of Cambridge, hosted by the Cambridge University Hare and Hounds. The course traverses roads, footpaths and trails, and incorporates some beautiful and not-often-seen areas of the city. It's a laid back event with a friendly and pressure-free atmosphere.

Both the full- and half-marathon courses are about 30% off-road, and there are several reasonably sized hills on the course - significant enough to surprise those who are used to the flat terrain of Cambridge. This is a challenging but fun and rewarding course.

More information can be found here.