Yes! Stuff happens.

My teen son and I were on a West US camping trip, because the women in our family were on a China tourist trip, we figured, hey, we are getting ours too!

It was only a 12 mile hike in Glacier Natl. park on an uphill trail to Logan Pass. (keyword ‘uphill’). By the time we finished at the top of the pass we’d both gone through about 1/2 gallon each of water we brought on the hike. At the top of the pass from the hips down we were shot like spaghetti legs, caught the last gratis shuttle bus back down to where the minivan was parked. Because of that experience we also hauled a group of serious college student backpackers back up to the pass along with getting them some cold drinks from the a stocked cooler. By then late in the day they also came to a conclusion to hitch a suggested ride up the road.

We returned to our campsite, totally beat, down the mountain to a hill near Lake McDonald.

Yeah, up is not down even near subsiding glaciers on a hot summer's day. We returned and probably acknowledged that out of shape suburbanites should clearly think out a few facts about hiking, even on trails in Natl. parks.

I mean, even the bears can come out at night, so we heard, possibly to hang out on warmer(?) moonlit roads in parks. :-)