I'm trying to get info on the terrain in units 5,13,131 and 441. I've hunted around montrose and pagosa springs and wanted to move up north but have bad knees and can't walk more than a mile or 2 miles. Any info I would appreciate.
I'd say most of unit 4 has fairly gentle terrain, as far as elk country goes. The national forest in 5 is reasonable too, the BLM in 5 is much steeper.
The public land in 13 is wicked steep, 131 I'm not sure about, as there isn't much public land. Just some STL I think.
Another unit with fairly gentle ground and decent roads is unit 70.
I'm not sure why you were interested in those units, but if it's because of the success rates, they can be misleading in units with large amounts of private land, unless that's what you're looking for.
I've spent countless hours either on my hands and knees or bent over, messing up my back, looking for blood. One such instance I remember most was a hog hunt a few years ago in Mississippi. I had never shot a hog so when I poked a hole in this guy; I was determined to find him. Wearing snake leggings, I crawled on my hands and knees through the briars and the brambles and bushes where a rabbit wouldn't go. I found a spot of blood here and there but never the pig. And lucky for me, I didn't find...