This is a fascinating discussion; learning a lot here.
I board at a barn with sand footing in the ring - it’s great when it’s moist (or even wet!), but when it gets dry, it’s as other posters mentioned - “beachy”. A combination of hard and slippery, and I won’t jump on it (only do cavalletti work.)
Unfortunately we have been experiencing a VERY dry summer in NOVA :(, so I’ve been hauling off property to local venues with the fiber footing or sand/fiber in order to do jump schools.
(I am the only boarder who jumps at my barn - it’s mostly a TB breeding facility with broodmares, babies, layups and retirees; IF the ring gets dragged every other week or so I’m happy, and no way would the BM water it just for me, she has 130 horses to take care of!)
The fiber footing at one of the venues I haul to is indeed deep - especially if not dragged, it gets deep spots in it and becomes a bit uneven (my mare still seems to like it and moves well in it, but she is not a “footing diva”, thank goodness!); not sure whether I would want to ride in it every day. The jumping ring there is a sand/fiber mixture which IF dragged, is soft but firm. My wonderful husband rakes the groundlines out (takeoff and landing) when I go school there, and my mare likes the footing and goes well in it.
From Googling, it seems like the GGT footing is an “additive” to regular footing? A cotton fiber?
At our local eventing venues (Morven Park, Great Meadow) Atwood footing is in all the arenas - dressage and jumping. It does well when dry (IF dragged), but when WET, it gets pretty “cuppy” and deep - I can’t imagine that’s good for tendons.
Back in the day (pre-cotton blends), rubber added to bluestone was the “newfangled footing option” to soften it up; it seems like that has become passe’ - and IME, places with rubber/bluestone mix tend to put LESS bluestone in, resulting in the footing getting hard when dry. If TOO much bluestone, it gets deep and cuppy - especially when too wet.
Is there a perfect footing solution? (Obviously it depends on your discipline as to what is “perfect”), but what do the UL venues use around the world?? I’m sure whatever it is extremely spendy, so possibly out of reach for many…