Rainbow Ridge 20k/50k

The Rainbow Ridge 20k/50k returns to Rainbow, Oregon on October 10th, 2026, continuing a tradition that began in the previous year with high acclaim and anticipation among runners.
This event is set at McKenzie River Dr Blue River, OR. The race morning atmosphere will be marked by crisp autumn air, often with mild temperatures ranging from an average of around 7 to 18 degrees Celsius, making for comfortable running conditions despite a notable humidity level of about 78%. With a slight risk of rainfall amounting up to 4 millimeters and the potential for some snowfall at higher elevations (around 0.1mm), participants should be prepared with appropriate gear.
Year two promises even more ambitious terrain, drawing in serious runners who appreciate challenging courses. Over 8,000 feet of climbing is expected across both distances, ensuring a rigorous test not just on the legs but also mentally for those seeking to conquer some of Oregon's most dramatic landscapes. The course features expansive views from high points like Macduff mountain and Horsepasture mountain, making it a true pacific northwest classic race.
For the 20k distance, runners start at the upper McKenzie community center before tackling steep climbs up to Kings Castle summit for breathtaking views over the McKenzie River valley and Cascade peaks. The route then descends back down in what is described as an exhilarating finale with fast trails leading all the way back to the finish line.
The 50k course begins from a shuttle point near Olallie North trailhead, where runners face nearly six miles of rugged terrain including climbs up Horsepasture Mountain and Macduff mountain. The longest section without aid stations covers about eight miles before reaching a turnaround at East Fork Trailhead for quesadillas and potatoes. This route then leads back to the same challenging peaks with their unique rock scrambles, offering ample opportunities for stunning views on both ascent and descent.
Weather conditions typically mean mild temperatures around 12 degrees Celsius during race hours in early October, with an average wind speed of about five miles per hour and UV index moderate at four. Trail conditions are expected to be firm yet slightly soft underfoot due to recent precipitation risks that runners must take into account when choosing footwear and attire.
The Rainbow Ridge 20k/50k offers a rigorous trail running experience over distances of both 50 kilometers and 20 kilometers, challenging even the most seasoned ultrarunners. The event supports Bridgeway House, contributing funds to educational programs for children with autism spectrum disorder throughout Lane County.