I drove to the bottom of Tangerine Road, just before I-10, parked and hopped on the gravel bike. The first 4 miles of the route parallels a canal.
The first 2.5 miles of the route was a road (not the above which is good) that basically was a wash with deep sand. I need wider tires for that so turned around and continued the route in the other direction which had a nice, scraped dirt road.
After confirming the start of the counterclockwise loop was on an acceptable surface, I turned around, returning to my car with only 12 miles. I'll go back tomorrow and do the entire, 30 mile loop.