<p>Just one more thing; If you get hot and wouldn’t mind a dip, there are two swimming holes where hot water drains into the river. One is in Mammouth, the other one half-way between Mammouth and Old Faithful. You can kind of choose your own temperature depending on how close you get to the source. The second one is FUN. The river carries you down. Then, the current slows down and eases you into a pool.</p>