The whitewater river run from Hauser Dam, Sec. 29, T12N, R2W to Cochran Gulch, Sec. 18, T12N, R2W in Montana has an ideal streamflow range of 1,400-4,000 cfs. This stretch is class II-III with a total segment mileage of 13.5 miles. Some significant rapids and obstacles include "boulder garden," "boneyard," and "split rock rapid."

There are a few specific regulations to be aware of before embarking on this run. An access permit is required to launch from Hauser Dam. Additionally, boats must be self-bailing and equipped with a Type III or V PFD for each person on board. There is also a no-alcohol policy in effect for this stretch of river.

According to the American Whitewater website, this run is a popular destination for kayakers and rafters alike. The scenery is stunning, with the river flowing through a narrow canyon, and there are plenty of opportunities to catch waves and play in the rapids.

Overall, the Hauser Dam to Cochran Gulch river run is a thrilling and scenic option for whitewater enthusiasts. As with any outdoor activity, it is important to educate oneself on specific regulations and safety guidelines before embarking on the adventure.