Yes the cache is in the Athabasca River, sort of. The map says so too. (Click on images to see larger versions).
Depending on the time of year some wading may be required to get to this scenic spot.
Have fun.
Chart of Athabasca River flow at Hinton

Keep this cache safe for kids. Please no knives, matches or lighters.
Please no food or scented items (soap, candles, lip balm, incense, etc.) or anything else which might attract animals.