Originally Posted by 3.5 PHB, p.130
Well....for Uncanny Dodge to have done anything in the situation, Haley would need something like the "combat climb" modifier in the expanded skill description in Complete Adventurer to have her Dex bonus to AC while climbing in the first place...and that involves taking a -20 on the check. That'd be doable with the DC 15 "adequate handholds and footholds" base DC, or even the DC 20 "some narrow handholds and footholds"; but at DC 25 "natural rock wall" it'd take boosting her level (for max skill ranks) or assuming a feat.