The Carrizo Creek/Gorge area is a jeep trail cut between the In-Ko-Pah and Jacumba mountains. There are numerous side canyons to explore. You can drive about 3 or 4 miles up the trail if you have a decent high clearance vehicle. As always respect the area and do not create your own trails.
The Gorge is famous for being home to the world famous Goat Canyon Trestle.