Gorgeous Mountain Lake with a couple issues...
I won't expound on all the reviews. This campground is magnificent and a jewel for our state but there are a couple flies in the ointment (or citronella candle, if you will).
First is the walk-up or "first come-first served" service advertised by the forest service for this site. One loop (of about four total, I think) is devoted to walk-up campers, no advanced registration. This is a valuable service as many of our lives don't fit with weekend get-aways planned nine months in advance. Week-long vacations, yes! But, this wonderful spot is less than an hour from a major metropolitan area. It's packed every weekend during the short summer months of our state. It's really great that Cle Elum ranger district understands this and TRIES to accommodate it's visitor's needs. People willing to take a Friday off from work and drive up in the morning should be able to do so with a reasonable chance of getting a spot for the weekend.
Now for the issue… Many campers have figured out a little hack into the system. I drove up to the site early on a Friday to find about half of the walk-up spots paid for and reserved but completely UNOCCUPIED. No gear, no vehicle, nothing. I looked at the reservation slips on the posts to see the spots had been reserved in some case two or three days previously for nearly a week stretch. Several other sites it was the same story but a car was parked in the spot, an empty car. No gear, no tent, nothing. This was at 8 AM, mind you! The campground has rules about occupancy after paying for a walk-up site to try and counter people usurping their reservation system. I complained to the person stationed at the campground entry post. She said that despite the posted rules, they had been directed to honor reservations paid for walk-up spots, no matter if they are occupied or not. It's sad but unless you are willing to take a little drive from your place in the Seattle-Tacoma area on a Wednesday night and pay for a "first come-first served" spot for four nights turn around and drive back and then in again on Friday night with your party, you are out of luck in July and August at this lovely resort.
A second issue is the Bureau of Reclamation is planning a huge project for Kachess reservoir. Climate change has lead to annual drought and extreme fire hazard in the Yakima River and Kittitas Valleys. The project will result in the reservoir being lowered by up to 80 feet in the summer! This would render the boat launch at this resort useless and seriously impact the enjoyment of site. Stay tuned for more developments.