Rehoboth Beach Running Co. Seashore

Rehoboth Beach Running Co. Seashore takes place in Rehoboth Beach, in Sussex County, Delaware, on December 5, 2026. Two distances are on the program: a half marathon (13.1 miles) and a full marathon (26.2 miles). The course moves through a mix of settings, from public parkland to urban streets and the seafront, with the ocean as a backdrop on part of the route. That variety gives the race a changing feel, alternating between a coastal atmosphere and more urban stretches.

A December seashore marathon is an appealing target for runners who want a late-season race after a fall of training, whether that means a first marathon or a personal-record attempt. The changing scenery helps break the distance into mental segments, which many runners find easier than a single unbroken environment. For the marathon, a 16- to 18-week build with a weekly long run peaking around 20 miles is the standard approach; for the half, 12 weeks with long runs up to 11 or 12 miles will do. Practice your fueling on those long runs so nothing is new on race day.