‘Sage Wall’ of Montana

The "Sage Wall" is a large, natural stone feature located on private land near Whitehall, Montana, within the Bob Marshall Wilderness. It's part of the Boulder Batholith, a massive rock formation, estimated to be 75 million years old (Late Cretaceous period granitic intrusion into earlier rocks and exposed to weathering). The part labelled the 'Sage Wall' is about 84m long and up to 7.6m high, and divided by deep horizontal and vertical jointing with some segments weighing up to 91 tons. The remarkable regularity in its features, including the size and shape of the blocks, has led to this feature erroneously being thought by some to be man-made. Some have speculated about the wall's origins, including theories about ancient civilizations, recent construction by unknown individuals, or even an astronomical observatory.

The wall is located on the property of Sage Mountain Center, a privately owned home-based business, and tours are available for a fee, "with the goal of promoting personal and environmental awareness". The Sage Mountain Center has created a moderate two-mile trail system to make the wall more accessible, with features like 400-year-old Douglas fir trees and views of the Ruby Valley. Access to the Sage Wall and trails is by reservation only, and tours are available through the Sage Mountain Center website. Trail hikes and tours cost $99 per person, with 17 years old and younger being free. An additional fee applies for guided tours. So, obviously promoting the air of "mystery" (including through pseudoarchaeological videos on YouTube)is to the financial benefit of the site's managers.

I'd like the grifters to show us
(a) the quarries these "blocks" used to build the "wall" were taken from.
(b) what function an 84m long straightish section of "wall" built with massive "blocks" served? What does it enclose/ divide/ demarcate?
(c) why was this construction material chosen instead of building a comparable structure with small rocks?
(d) where is the contemporary settlement activity required to produce the manpower (and audience) for such a structure? 

 (e) Why is it NOT a natural feature?

Anyway, here's a guy Timothy Alberino looking at the "wall" and going beyond the superficial "looks like" approach of the other YouTuber promotors of this place - like comparing the front and back sides of "blocks" and drawing the only conclusion one can (though he seems unable to resist the 'mysterious music' urges and is rather timid in actually making his mind up):

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Montana Megaliths | Sage Wall Field Analysis

Posted on You Tube by Timothy Alberino Jul 6, 2023

(31,808 views).