hose her down and let her chill in a shaded space. but you usually don't want them sweaty before riding because of overheating or heat stroke.
Hi 🙂 If my horse is sweaty in the pasture, I don't ride at all. I will check on her to see if there is something wrong, because obviously if she's sweating it's not really usual (unless it's really hot and she's been moving a lot in her pasture which is not normal).
I would give her water, cool her down and make sure everything is ok, or call my vet