Just a heads up, this post is from last fall on another forum...
"Hey guys. I've seen this posted in a couple of groups today. Looks like the K-Trail is closed for good from Clayton to Three Sticks. Apparently, you can drive in from Three Sticks to the fire tower but no further west. I guess it's all private land and the land owners don't like off-roaders coming through any more. Here's the info I've seen. Might call the numbers on there and double check.
"I talked with Pushmataha County game Warden, Dane Polk this morning. Had a long phone conversation with him. It's been a private road for years and years now. It's 100% private land on both sides of the road (as we knew), and IT'S A PRIVATE ROAD as well (no different than someone's driveway). Has been for a LONG time apparently. This isn't a recent deal. There is NO forestry land up there, and no ODWC land either. There USED to be but it has all been sold to private land owners, so everything on and along the trail is private from 9 Pine Road up till the Fire Tower. From the fire tower eastward is USFS land and legal to be on. I went by the 9 Pines entrance of Clayton Trail yesterday and there are no signs, no gates, nothing... so I asked Dane why there wasn't anything there to stop the traffic, and he said that they just get ripped down and it's a lost cause to try and stop them... he did say if you are caught on it, and the land owner wants to press charges, you will be fined a $500 trespassing ticket the first time, and the 2nd time you are caught it's $1500. Doesn't matter if there are signs or not, as you DO NOT need to post your land in Oklahoma to press trespassing charges, so signs or not, it's illegal to be up there. If you don't believe me, or have questions of your own, please contact Dane Polk, Pushmataha County Game Warden based in Clayton, OK (+1 580-271-0808). He will tell you everything I just did, as he has jurisdiction over that trail. Not USFS, not country Sherrif, not local PD... Dane is in charge of it.""
I also talked to a guy last winter that leases some of the land along the private road and he said they are very serious about stopping trespassing. Apparently folks are fed up with land abuse, poaching, and drug issues along the trail. Take it all for what you will...