How to get in overall best functional shape?

I think doing a long hike once a week, a tempo once a week, a hill workout once a week, and a boxing class a couple times a week will get you there.

Fight back against people?? Do you find yourself in this situation often?? Are you still in HS?? In reality most distance runner types won't find themselves in this situation because most dbags looking for a fight will find each other pretty quickly and they tend ignore dudes who they don't feel threatened by.

For your other items, just like all training, specificity rules.

Doing sprint intervals up a hill improves sprinting up a hill.

A peloton is good for indoor training for outdoor cycling but it won't do much for fighting, hill sprinting or backpacking.

Now if you're going to do a big backpacking trip, all the running or lifting or biking or cross country skiing will not prepare you....except for gaining general fitness. You must do it to prepare. Big loads of gear in your backpack is no longer de rigueur for long trips but it might help you get ready for big trips. Doing a series of small to medium to longer backpack trips before your big one is even better. Expect to have to figure out what footwear works best for you and then expect blister management at first. A bigger deal is learning how to deal with the mental rigor that big trips take. And learning how to become a minimalist with food, shelter, sleeping pads & bags, and importantly how to deal with doing it all in rain, wind, cold, heat...and critters big and small.

Practice some sort of martial art and running. I think you'll be able to handle the hiking with any sort of training.

Hell, yearh!

Conditioning loves variety. Mix it up. Don't fall in love with one workout/routine or exercise.

Cross-train, and don't be afraid to search out conditioning workouts and try them. Rotate them into your program.

But do understand that entire books have been written how to go about this, so there's no short answer. A lot will depend on what you are starting from and what you want to achieve.

And don;t overlook nutrition, rest, reducing stress - you know the drill.

Cross country skiing, skate, is the best single conditioning exercise I’ve ever done. Better for running than running.

Watch Garrett Heath, a state champion XC skier, take down Bekele, Kiprop and Ferah at Great Edinburg . He could destroy those guys in anything athletic short of a 5k on a track, while probably being 30lbs heavier with way more muscle. A great generalist body that can also take down Bekele on the grass.

Do not forget ROWING.

You have a lot of goals and none of them are about overall best functional shape.

To defend yourself, learn a martial art.

To crush a couple mile tempo, perform 5k training.

To sprint up hills, perform 800 training.

To do backpacking on long hikes - do some form of distance training combined with backpacking on short hikes. If you train for 10k-marathon, no hike will wind you. If you do some backpack hikes of 10 miles or so, you'll get used to the backpack.

Exercises at the gym - some core exercises, combined with a treadmill. Most of this work is best done outside though. You could do a lot of it on a treadmill if that is what you enjoy.

How is peloton for cardio? alright - it won't be the best way to achieve any of your goals, but its an alright form of cardio.

Swim, row, gym, hiit training

and run and/or cycle a lot.