Two of my four Bostons LOVE to go hiking. But we've never taken them for anything more than 4 or 5 miles. They are very sensitive to the heat and it doesn't take much to overheat. I'd say anything above 75 and they don't last. Just be sure to have lots of water for them! I'd love to know how yours do if you go for longer hikes and what kind of terrain. We hike around the Harper's Ferry area of WV and it's not too hilly or treacherous for them (or us! lol!). I take that back...we did take one of ours up Maryland Heights and that was a bit of a climb for our girl, but she did tons better than we did!

We take Zeus hiking, but he doesn't really love it. And I worry about him burning his paws if it's hot.

He does like to go camping, though. We go four or five times a year.

I take my dogs "hiking" often. I say "hiking" in quotations because in Florida, there really is no such thing as hiking, unless you live up in the northern part. I take them on flat trails with water bottles up the wazoo, backpacks for two of my other dogs, and small towels to soak Tito's chest to cool him down. Afterward, we take them to the lake to let them cool down. I don't use harnesses on my boys because most of the time they walk right next to me. Tito uses a prong collar instead of the standard collar because it's easier on his breathing.

I always keep on eye on all of my boys to make sure they don't overheat and I take things slow. :D My dogs love the fact that they are somewhere else besides the house or our neighborhood and take every chance to mark every tree they come across!