In August we decided to try the Palomar Cycling Challenge. We stayed a camping site close to the beginning (below).
Here's Jacques with our road bikes.
The race started at the bottom of the road leading up to the Palomar Observatory. Up is the key word. We climbed 6298 feet over 32.89 miles! That's insane. By the way - that specific Planatorium was the one in the movie "Rebel without a cause" with James Dean in 1955.