The Filter Plant section of the Cache la Poudre River in Colorado is a popular Class II-III river run. The run starts at the Filter Plant Dam and ends at the take-out at Picnic Rock. The section has several obstacles, including a few class III rapids that can be challenging. The best time to float this section is from May to September when the water levels are between 300-800cfs. At higher levels, the run becomes more challenging, and some rapids become Class IV. Overall, the Filter Plant River Run is a great option for intermediate paddlers looking for a fun and challenging whitewater experience.