Griffith Park vs the Card Sound Bridge

I've been very curious about this for some time now. How does what I'm doing out here compare to stuff we did in Florida? What's the index of toughness? Here is a chart illustrating how the toughest climb in Florida measures up to the standard climb here. In Florida, our only measure of a tough climb would be bridges and/or overpasses. The toughest of which is arguably the Card Sound Road Bridge connecting mainland Florida with the Keys. The climb up one side of that bridge is 65 feet in .25 miles.

In contrast the Griffith Park climb (up to the observatory) in LA is about 630 feet in 2.25 miles. It's average rate of climb is 70 feet every .25 miles. (I go up to the observatory, down the other side and then turn around and go back up again, but i'm only counting the firt part here.)

In conclusion, the first part of my Griffith Park ride is roughly equal to climbing up the Card Sound Bridge 9 times.

Oh, and please let me add that I'm getting schooled out here on a regular basis, mostly for lack of muscle power. More on that later...