Yeah, pretty well heartbreaking for us locals. The holes that are being removed are the first 9 that went in, which includes the "famous" basket on the side of the cliff hole among a couple of other player favorites. Holes 8 & 9 of the Red Course(Right front 9 as you look at the big bowl) may also need to be relocated as well.
The tough deal is that the course was never approved to be in the park. Our Parks Dept understands that it's a destination, the superintendent had 1 traveler from WI and 2 from WV(?) show up the day they were closing it and he had to personally turn them away. I've been telling them for 2+ years, since I started a new club and began working to improve the local DG community, that Billings has something very special in Diamond X. Their issue is that the land was donated as a natural park with the stipulation of not developing it and the fact that the DG course was put in doesn't sit well with them.
Our club, along with the the help of a local civil engineering firm, is looking to design a couple of proposals to either create a new loop in a very unused area of the park that would connect to one of the top 9's or even work out a major redesign. While our hopes aren't high that we'll get anything major approved, we're going to fight to maintain what we can of one of the most unique and beautiful golf courses in the country. Our first goal is to make sure we get Red 8 & 9 taken care of. With that done we'll have the 1 front nine and still both back nines, which also contain a number of signature holes.
They were supposed to have it re-opened for play by next weekend, when Billings hosts the Big Sky State Games. I'll keep the course page and this thread updated as things progress. Feel free to PM or post with any questions and I'll do my best to answer. I appologize to anyone who was unable to play the X since it's closure in May.