Haha legend stories are nice to take in. We have a show in the States called Myth busters I should write into them and ask them to take a look into it. They test the stories by recreating and such. Now they wouldnt jump this cliff though but would see how far a good horse can jump or talk to people who jump horses.
No swimming or fishing this stretch in the Gulch but the area I photographed later in the post you can do both. There's also an area that has 50 to 75 foot rock cliffs where you can jump into the water.
Thanks for the appreciation and your pick:)