Put In rapid marks the start of the Little Carp River run through the Porcupine Mountains, offering paddlers an immediate immersion into the river's technical character. The entry point features a narrow, boulder-strewn channel with potential for tight maneuvering and some initial drop, requiring precise boat placement and careful route selection. Paddlers should be prepared for potential pinning hazards and assess water levels carefully, as the rapid's navigability can change significantly with flow.