Miniature pinschers are great for hiking. They might be small, but they can walk for long distances at a fairly brisk pace. You will need to be a pretty active person yourself to be able to keep up with a min pin. Hiking is a great way to get in your min pin’s daily exercise. They love to walk for long stretches and will enjoy scrabbling around on a hiking trail.
Min pins are also agile so will be able to go over uneven and rocky ground, so you won’t have to stick to easy trails. Just make sure to keep them on a leash or close by, as they can often want to go off on an adventure themselves. They can, of course, be trained to return when you call. But they might be a ways off before this.