Up is the preposition.
Hiked up e.g. I hiked up the mountain
Oh, absolutely, friend! In this sentence, "hiked up the mountain" is the predicate. It tells us what your family did, and it's a lovely image of togetherness and adventure. Keep up the great work with your writing!
Beneath is a preposition. A little trick to determining if a word if a preposition - over the mountain, under the mountain, beside the mountain, around the mountain, through the mountain, around the mountain, above the mountain, beneath the mountain, up the mountain, down the mountain, from the mountain, to the mountain, etc. If you can't do it to the mountain, it probably isn't a preposition.
It can be either, depending on whether it has an object. "He climbed up the mountain" (preposition, object mountain) "He entered the elevator and went up" (adverb, no object).
A mountain bike can reach speeds of up to 40-50 miles per hour when ridden downhill on a steep slope.
Chasing it up mountains of steep rocks and pouncing suddenly.
"The man hiked up the tall hill""We went sledding down the hill""What looked like a hill in the distance was actually a big pile of trash"
To create a handhold to allow the climber to ascend up steep or vertical cliff faces.
I shifted gears to gain more power driving up the steep, mountain road.
The preposition is up.
An aerial railway is an enclosed carriage on a set of wires, mainly used for transportation up a steep mountain slope.
They have a soft inner padding that aids with traction, split hooves that can spread apart for balance, and sharp dewclaws that keep them from slipping.