Bryan C: My dog(s) have hiked and backpacked with me through the years and it is one thing that makes my trips so enjoyable. As long as your dog is well-behaved and minds your commands, most people don't mind seeing them, although you'll always encounter folks who dislike dogs on sight. Dogs aren't allowed on any part of the JMT, but we have taken ours on Paiute Pass, Mono Pass, Duck Pass, Fish Creek, Virginia Lakes area, etc. etc. About the only downside of having a dog on a backpacking trip is if they get injured, but it seems to me I see more people getting altitude sickness, etc. than a dog getting hurt. Make sure that if your dog has tender feet, to consider purchasing dog booties. My current dog has pads of steel and has regularly done day hikes of 20+ miles-and she loves it! The most important thing is to gauge your own dog's ability and enjoyment level, take to the mountains, and take a hike! P.S. Always be sure that you carry plenty of water for your pup, also. Or that there are enough creeks and lakes along the way.