if you're like me-- born and raised in the NJ watershed and New Orleans (6 feet BELOW sealevel)-- this is some serious elevation, as is all of Mammoth Mountain-- take. your. time. this is an easy trail, but it is not easy for those of us who are used to being at or below sea level. it will be frustrating to pace yourself, especially if you're athletic with hiking experience, but the top of the glacier-polished postpile is breathtaking-- I wish the photos I took could do it justice. for sea-levelers, I recommend walking to Rainbow Falls first, taking a 15 minute break, then moving toward the top of the postpile. The glacier-striated hexagonal columnar basalt up there looks like a damn-near perfect tile patio job. try to be on top of the postpile around golden hour-- real treat.