What is the best type of dog to go hiking with?

Tim asked:


I have a boxer. He is in great shape, but the fact that he has a punched in nose makes me think he might not be able to hike as well as I would like.

Since I would love a breed to go hiking with on moderate to difficult trails, can anyone tell me a good, friendly breed to go with?

Thank you so much!
You guys are great! Thank you so much!