New Year's Run 5K/10K/13.1 DENVER/AURORA

New Year's Run 5K/10K/13.1 DENVER/AURORA takes place in Centennial, Colorado, on December 26, 2026. Four distances go off together at 7:30 a.m.: the half marathon (13.1 miles), the 10K, the 5K and a one-mile family fun run. You choose the distance that suits you and hold your own pace, with timing left to the running app you already use. Entry includes a technical race shirt, a finisher medal and a digital training pack, and the event connects runners with local clubs.

This is a road event with everything on one start, so the decision is really about how you want to close the year. If you have kept a base through the fall, the half converts that fitness without asking for a long taper; if 13.1 miles would be new, ten to twelve weeks with one weekly long run is the honest build. Runners coming from sea level should expect Front Range altitude to cost a little pace. A family can enter four different distances and still finish within the same hour.