It seems that deer prefer standing water/mud holes to streams and ponds around my area. Last summer, I cleared a few stumps out on the property that I hunt/manage. On a skidder trail there is a spot that always stays wet from an underground spring. I needed some dirt to fill in some of the stump holes so I took a couple of buckets from the wet spot with my Kubota to level out the low spots in the new clearing.
A few weeks later the low spot was holding water and there were deer tracks all around it, so I set a trail camera up on it. From July 17 thru the end of August I got 237 pictures of animals (coons, possums, turkeys, squirrels, coyotes and deer)using that water hole and almost 200 of them were deer.
Within 300 yards of the waterhole there is a small creek and within a 1/4 mile there is a 3/4 acre pond so there are other options for a drink. While setting on a ridge where I can glass the creek bottom, I have watched deer cross the creek and climb the ridge and head straight to the mud hole for a drink. Maybe the mineral content draws them to it? don't know why they prefer the mud hole water for sure, buy they definitely do!