boardwalk next to tangled creek and black warrior springs leading into hot lake in yellowstone national park in wyoming usa

america and basin black blue boardwalk camping cascades catwalk cloud crater creek cumulus drive elevated fall firehole footpath forest fumarole geology geyser green hiking hills hot into lake leading lower mineral mist mountains national nature next north orange park path pond promenade sidewalk sky spring springs states steam summer tangled thermophile trail travel trees united usa vacation vapor walkway warrior water western wilderness wood wooden wyoming yellowstone