BOULDER, Colo., July 31, 2023 (SEND2PRESS NEWSWIRE) — BOLDERBoulder, recognized as America’s All-Time Best 10K by Runner’s World and the nation’s seventh-largest road race, made a resounding comeback this Memorial Day on May 29. The event witnessed tremendous success, attracting an impressive turnout of over forty thousand participants and almost one hundred thousand spirited spectators, according to Stack Sports.