A nice wash loop, where hardly anyone goes.
Follow the Diablo road for a short while and hike up a small rocky wash on the East side.
This is the only more difficult part of the hike, the rest is an easy firm wash hike.
It's possible to shortcut the hike by about 1 hour by going North at point "Shortcut", just follow the included shortcut route.
You end up at the East Mesa, head south and enter the Deguynos wash.
At a Fork head back in the smaller wash going up.
It will be very hard to complete this loop without a GPS as the smaller return wash forks a lot.
How to get here:
Take Split Mountain Road for about 8 miles.
Follow the road towards the Fish Creek campground.
Where the road starts is mostly in the middle of the wash. But in other years at the right hand side of the wash as in 2013.
Road condition vary a lot from year to year.
The road is sandy with some rocks.
As soon as you see the wind cave sign on the left side of the wash (after 5 miles), keep in the same wash, by keeping a bit to the left.
Don't go into the first North fork, but keep left.
The wash you are entering should be signed as South Fork.
From the entrance of the South Fork, drive for about 5.2 Mile to the Diablo exit (may be unsigned) and park.
Warning:
The Carrizo Impact Area has been in use until 1959. it is an closed off of area with unexploded ordnance. Sometimes buried deep in the sand.
The hike is well outside the impact area.
Make sure you don't head much further South/East in the wash and stay inside San Diego county.