If you are near Salida, Colorado, this looks like fun!
The Salida Playpark on the Arkansas River consists of two waves/holes depending on water levels. The Arkansa River has a good size drainage and is dam controled. It can flow as high as 6,000 cfs. For water levels, you can click here. Depending on flow, these waves can be world class.
At low to medium flows the upper hole is more of a poor-over and the lower holes is awesome. The lower hole is great for beginners to expert boaters. The hole is great for loops and is backed up by a bunch of flat water for recovery. At the lower flows, there is even a sand beach for those paddlers that may have kids or just like the feel of sand on bare feet. With views of Mt. Princeton in the background, a town park, this playpark is fun!
At high water, around 1,500 cfs and up, the lower hole washes out and the upper hole can be hard to stay in. If you can, it might be the best ride you every had. At high water you may also get washed down below the return eddy and have to walk back up. This can be frustrating after a while. The wave is best for flat spins and surfing. Swapping ends and sticking the wave is tuff.