The City of Montrose got itself a new whitewater park in 2015. It features a set of six distinct features that change a fair bit at different flows (which are a little complicated to figure out, see below) but provide surfable features at a wide variety of flows, and which are surfable later into the season than a lot of other areas thanks to irrigation needs and water calls in the area. You’ll start to find something to surf as low as 200-250 cfs, and things stay good over 750 and likely well above. Even at lower flows, you’ll find a couple green waves that will work for SUPs, though you may have a hard time staying on the low-flow features on a shortboard.
Due to irrigation needs in the area, the Montrose park holds decent flows into the late summer and fall, a rarity in Colorado. There is enough plumbing in the area that the closest gauge doesn’t give a very accurate picture of the flow, but fortunately the Town of Montrose maintains an “Estimated Flow” figure on their website here; it’s the best source of flow information.
For photos of the waves at specific flows, check out the River Surf Report.
Park at Baldridge Park in Montrose and the features will be directly in front of you in the river.