Middle-earth is the first area you'll come across if you're taking the usual approach into Ozone--and, conveniently, it's home to a variety of excellent warmup routes! There are a few cracks which I can't comment on since I haven't climbed them, and four sport routes rated 5.9, 5.10a, 5.10c and 5.11a.

Middle-earth is the first collection of long, bolted climbs you'll see as you descend into Ozone from the standard (western) approach trail. The trail will split, with the left fork leading up to a bulge of rock and the right fork leading down to the rest of the crag. The climbs off the left fork comprise Middle-earth.