Waterfalls look calm from a distance and are frequently more dangerous up close than they appear — wet rock, sudden drop-offs, cold water, and currents that are far stronger than they look are the leading causes of waterfall injuries and deaths nationally. The restrictions you see on official pages aren't arbitrary; each one usually maps to a documented hazard at that specific site.
5 of our current listings explicitly prohibit swimming, per the managing agency. Common reasons agencies cite: submerged rocks and logs, undertows or recirculating currents at the base of a plunge pool, cold water that causes muscle failure even for strong swimmers, and slick rock that's easy to fall from. Where a listing says swimming is allowed, that's a legal-access fact, not a safety guarantee — conditions still vary by day and season.
21 of our current listings note dogs are not allowed, per the managing agency. This is most common in national parks (where pets are broadly restricted on trails to protect wildlife) and on trails with exposed edges or river crossings where an off-leash dog is a real hazard to itself or others.
A trail or trailhead closure usually means one of: storm damage (washouts, downed trees, undermined bridges), wildfire damage to the surrounding forest, a safety incident that prompted a review, or a scheduled maintenance/construction project. Always check the official link on a listing page before driving out — a closure can appear or lift with little notice, and it isn't something we can track in real time on every listing.