Here's a video of an old bull elk, protecting his harem. There's a true saying, "you don't ever, try to take an old man's women, especially if there young women."
Old age and treachery will overcome youth and skill everytime ........
We have an Elk farm about five miles from us out in Whitewater Colorado. It's an awesome sight to see these big fellows up close. The Bulls can weigh from 800 to 1500 pounds and the top of their racks will reach 8-10 feet to the top!
This is the Madison River inside your Yellowstone Park and you can
See on the hillside in back of the river the remnants of the lodge
Pole pines that burned in the 1988 fires – note the lush green
Understory of the new pines that have grown back in since 1988.
As for the Elk fight, it’s interesting how the two bulls instinctively
Move down river into the shallower water before they square off, and
It is the old man who is noticeably limping both before and after the
Fight who prevails. He has clearly already been defending his cows
Against other suitors. Another bull is attracted to the commotion but
Decides not to challenge when he sees the first challenger defeated.
We are really lucky to have this still taking place in our fast paced
Urban sprawl country!!!
http://billingsgazette.com/lifestyles/recreation/youtube_ddfabe82-24c6-11e0-80df-001cc4c03286.html 
