In reply to OlgaP:
We had a road trip last March / April across California climbing, started in Joshua Tree and then had a few days in Yosemite after most of the party had headed home. We mainly climbed trad but did look at the sport possibilities before we went but nothing jumped out compared to the trad climbing. I am sure there is loads of great sport climbing, if you were thinking of sport because everyone always talks about the huge routes in Yosemite there is a huge amount of single pitch trad routes.
The other thing we learnt when we were there was that in the US top roping a route to push your grade is really normal and you see people doing it on lots of routes. With the caveat that people would often stop top roping if another party arrived wanting to lead the route.
Message me back if you want to know anymore