Grassy Key RV Park & Resort

Fishing, kayaking, and waterfront access draw RV travelers to Grassy Key RV Park & Resort in Marathon, Florida, where several sites back directly up to the water and a boat slip gives anglers and boaters a practical staging point. The park is small and tight by design, accommodating rigs up to 62 feet with full hookups including electric, water, and sewer. Reviewers consistently note that waterfront sites fill early, so advance reservations are strongly recommended, particularly for the peninsula site that commands open water views on multiple sides.

The grounds run on crushed gravel throughout, which is worth knowing if you're traveling with pets or prefer a softer surface underfoot. There is a small grass area designated for dogs, though reviewers mention it is unfenced and on the compact side. The park has no bathhouse, so rigs need to be self-contained. A heated pool and a common area with laundry round out the on-site facilities. As durland E. puts it, the park is "very clean, upscale, with beautiful views, water access, and heated pool," and multiple visitors note management keeps standards high when vetting guests.

Rates run higher than mainland campgrounds, consistent with Keys pricing generally. Nearby options along the same stretch of US-1 include Jolly Roger RV Resort and Sun Outdoors Marathon, which give travelers a sense of the range available in this corridor. Grassy Key RV Park & Resort works best for self-contained RVers who prioritize direct water access and a well-maintained, lower-density setting over amenity-heavy resort campgrounds.