| In Morro Bay exit Hwy 41 to Atascadero |
| Set your odometer to 0.0 at the stop sign (Hwy 41 and Main St, Morro Bay) |
5.8 miles - A tiny turnout. Use extreme caution as the cars are traveling very fast.
Ultramafic Rocks - serpentine green and brown (once dunite and harzburgite)
Dikes and Sills (originally diabase now rodingite) |
| 6.3 miles - A better turnout. |
| 6.5 miles - A better turnout. |
| 6.9 miles - Turn right into the Cerro Alto Campground entrance. |
| 9.6 miles - Turn right into a private road entrance. Devil's Gap just ahead! |
| 11.7-12.0 miles - Sur-Nacimiento fault zone. |
| Gas & Food at Arco or 76 Union in Atascadero |
| 15.5 miles - Go south on Hwy 101 |
25.6 miles - Exit into the Truck Brake Inspection lane. Continue to the stop sign.
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| Reset Odometer to 0.0 miles - Go right toward Botanical Area |
