On trail erosion:

There are, of course, academic studies that investigate this, such as

Erosional Impact of Hikers, Horses, Motorcycles, and Off-Road Bicycles on
Mountain Trails in Montana
<https://www.researchgate.net/publication/268297897_Erosional_Impact_of_Hikers_Horses_Motorcycles_and_Off-Road_Bicycles_on_Mountain_Trails_in_Montana_Authors>

It discusses the difficulty in actually measuring things like this, but
concludes, among other things:

horses produced significantly larger quantities of sediment compared to
> hikers, off-road bicycles, and motorcycles
>

It should be noted that other studies found ambiguous results when
investigating this and related study areas.
My takeaway is that it is very difficult (if even possible) to make broad
generalizations about the impact of various trail uses on nature (except
that to preserve nature in its absolute pristine state we would need to ban
all human usage of our conservation areas :-).




On Tue, Jul 5, 2022 at 5:27 PM Gordon Woodington <alpinemeado...@gmail.com>
wrote:

> Horse hooves promote water absorption by their imprint, a good thing, not
> run-off as bike ruts do.   So I think Quincy would be ok.  I will bet that
> he would not like bikes be permitted on the trails in Adams Woods.
> "Original intent"  to use a recently invoked term.  Who will foot the bill
> to repair bike rut damage? Yet another unprovisioned expense.
>
> Gordon Woodington
>
>
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