The Lower Narrows river run in Colorado is a challenging Class IV-V run with tight and technical rapids that require precision maneuvering. The run begins at the Poudre Park Boat Ramp and ends at Picnic Rock. The best time to float this section of water is from May to July with recommended CFS between 500 and 1500. There are several river obstacles to navigate, including steep drops, narrow channels, and large boulders requiring precise maneuvering. This run is only suitable for experienced kayakers and rafters with advanced skills. It is crucial to scout the rapids and have proper safety measures in place.