I'm a bit of a map nerd, ok, let me stop lying, I'm a total map nerd. Anyway, in an effort to give all of you an idea of the terrain and the location that Blaze disappeared in I pulled up a topographic map of the area. I tried to crop it down as much as much as I could while maintaining the correct aspect ratio so as to maintain the proper distances between points. I also left the legend at the bottom of the map intact, it's pretty self-explanatory but if you need help ask away.
Borrego Park is marked with a black X and the black arrow next to the X points to the start of the Borrego Trail, which is where Blaze likely headed and he went north into the wilderness. As you look at this map the brown lines are topographic lines, the closer they are together the steeper the terrain and the further apart they are the flatter the terrain. You'll need to zoom into the map in order to really see details. You'll notice that there is A LOT of water features in the area. I don't know how deep they are right now but this map was created in 2015, so it's quite recent and up-to-date.
Anyhow, thought y'all would enjoy seeing a proper geologic/topographic map of the area. If you have questions, ask away. If you'd like a link to the full map just ask.