He's a bit bigger than the Roosevelt Elk we have around here. There is a valley about 50 miles west of where I live where about 150 Roosevelt Elk live. It's a wildlife perserve so as long as they stay in the valley they are fairly safe. I don't have the lens you have and they stay away from the road when people are there and it near sundown with the sun coming from the right, but here's one I got with my 100-400 lens:
There were a number much bigger than the big one here, but I don't think as massive as the one you have above. Nice shot.
Mike