Most river users to date use rafts or kayaks as the main mode of transportation as there are numerous Class III and five Class IV rapids. Canoeists attempting to paddle the Firth River should do so only in covered canoes and must be expert paddlers with the ability to role upright. River difficulty is rated using the six-part International River Classification System. Class I - Very easy . Suitable for novices in all boats.
Waves are little more than riffles and regular in pattern.
The current is slow to moderate and the course obvious. Class II - Easy . Suitable for intermediate open canoe, novice closed canoe or white-water boat with intermediate accompaniment. Waves are up to 60 cm in height and current velocities are fast. The course is obvious and relatively clear.