As an owner of multiple dogs I am always on the lookout for buttboating trips that the pups can come along on. A key criterion seems to be a riverbank or shoreline that the dogs can run along without encountering major obstacles such as cliffs, roads, canyons or major tributaries. So far, I’ve had good luck with the following rivers:
Eagle River, including Echo Bend and Campground Rapids
Boulder Creek
South Fork of Eagle River
Chickaloon River
I welcome other suggestions.