Embark on an unforgettable running journey at the Northwest Series - Day 5 ID, hosted in the scenic Hell's Gate State Park in Lewiston, Idaho, on September 23, 2026. This event, part of the acclaimed Mainly Marathons Northwest Series, offers a variety of distances including a full marathon (26.2M), half marathon (13.1M), 10K, and 5K, catering to runners of all levels and ambitions.

The course itself is designed to engage, featuring a 2.2-mile out-and-back loop within Hell's Gate State Park. While generally considered a fast course, runners will navigate a mostly flat, paved route with some gravel sections and a few small, manageable hills, offering a stimulating yet enjoyable experience. Typical race day conditions in late September in Lewiston boast pleasant temperatures, with highs around 76°F and lows near 50°F, accompanied by a minimal 2% chance of precipitation, providing ideal running weather.

What truly sets the Northwest Series apart is its commitment to the runner experience. As part of the "World's Best Marathon & Half Series," this event proudly offers no time limits, encouraging participants to complete their chosen distance at their own pace. Runners can expect excellent support, including ample "mouthwatering food" to refuel, and finishers of races longer than a half marathon will be rewarded with a custom metal-stamped nameplate, a cherished memento of their accomplishment. Join this spirited community for a day of camaraderie, personal achievement, and picturesque Idaho scenery.