Jess, sorry to hear that. I feel your frustration! My diagnosis-via-collective-wisdom (which includes an ortho FNP and an ortho acquaintance who admittedly does mostly shoulders) is extensor tendon tendonosis/itis (aka...kid you not...ultramarathoner's ankle). Mine is getting better but still no running & stairs. I've been riding a bit too, which is fine for about an hour and if I don't try to stand. Stupid.overuse.injury. I'm glad I have been able to do what I have post-surgery, though. Always remember that things could be very different!

Nice to see so many people enjoying the trails!