Tubing is a popular summer activity in Colorado, but one study found that the seasonal fun is leaving behind more than just a good time. The study was released last week and found that a popular tubing river in Golden contained several forms of human-caused waste in 2022. A group of researchers, including some from the Colorado School of Mines, looked into the impact of recreational activities on one Colorado river. The study looked into a stretch of Clear Creek in Golden, which researchers said hosts hundreds of tubers on the weekends in the summer months. To determine the impacts of the recreational activity, researchers took samples from the creek during a low-traffic time, as well as a highly trafficked holiday: Labor Day weekend.