Whitewater Rafting the Alberton Gorge in August has never been better in the fifteen years we've been running this beautiful section of the Clark Fork River. A few August rainy days have kept the Clark Fork running fast and high, we're loving it. Latest News: Montana River Guides offers free scenic float trips thorugh the Tarkio Gorge or on the Bitterroot River for Cancer Patients and their caregives. Just give us a call at 240-8060 and we'll take care of the details. Everett and Yaell rowed a trip through the Tarkio Gorge tonight at sunset and said it was beautiful.