^ agreed

basic lower body compound exercises like squats and deadlifts or combine lower and upper body w/ lifts like thrusters and hit the core hard

you need to keep the cardio up, anything that closely mimics moving in the mountains- stair machines, versa climber and the best- just a steep hill

hill repeats are bar none the "best bang for the buck" I've found for moving in the mountains, add a pack for more resistance

usually with enough cardio, you don't have to count calories much