Don't get me started...
But now that I am...
The previous poster about "god's gift..."... yeah. No matter how you look at it, equestrians are a valuable ally in the fight for open/public trail use. Likely because they are 100 times more vocal than most mtb'ers (or at least that's part of it). Despite the fact of published information citing horses do substantially more damage to trails than hikers, and even cyclists.
That said - the crap problem is indeed substantial - and I find it just plain rude. Sure, our country - especially Arizona - has a long history of raking horses akin to India's view on cows... but that's no excuse. I have, for a long time, wanted to print up plastic signs saying "pick up after your pet" to plant in piles. As a matter of fact, does anyone know the standard city statutes in this regard? I'm sure it's not exclusive to dogs. These trail mashers should be required to wear Depends, a hanging bucket (like some city police horses do - I've seen somewhere), or require the damn rider to carry a pooper scooper and a bag...
And while we're on the topic... down here in Tucson at least, at least two trail systems (if not more) are constantly being "cleaned" by equestrian riders - both 50-Year and Starr Pass. I'm not talking about the "cleaning" that rookie cyclists do so they can clear a rough section... I'm talking about smaller rocks right in the middle of a trail that most of use ride right over... they get pulled up and discarded, leaving gapiong holes, and adding to erosion problems.
I'm all for "shared use"... but as defined, others *do* share these trails... we shouldn't have to dodge horse crap.
Now... the cattel crap (usually of the sloppy, runny, type) is yet another story... only thing that will change that is changing the grazing laws... which will happen about the same time as horse poop is restricted on trails.
Grrrr...
Hank