March is usually too early for Rappel Rock, which is up around 9000'   If all you've got is an afternoon, your best bet is to head to Chimney Rock. Chimney has a stellar selection of one and two pitch routes in the 5.8 to 5.11 range. I recommend (from left to right): 
  
Mistaken Identity 5.9: great wandery gear protected face and discontinuous crack climbing. bring small tricams 
  
Centerpiece: 5.10-: more of the same, with crux bulge at the top. 
  
Jungle Gym 5.10+: fun if you're feeling burly, rap at the end of p1. 
  
Shriveled Penis 5.11: Thin crack, worth doing just for name, but climbing is good. 2nd pitch is good 5.9 crack 
  
FIUTT 5.9 or 5.10: Name is acronym for "fuck it use the tree" and the route is 5.10 if you don't. Brilliant stemming, stay in the corner. 2 pitches. 
  
Stripper 5.8: Fun moderate, same start as FIUTT 
  
Crows Nest 5.10-: Splendid leaning corner, use a long rope and runners to string it into a single pitch. If I were going to do only one pitch there, this might be it. 
  
A little higher up the mountain Windy Point offers tons of options, but you'll spend more time in the brush getting oriented in the profusion of fins, while Chimney is a single  very short approach. 
  
Oh, be aware that none of these are sport climbs.