Class I: river tay kenmore to aberfeldy ideal for small children
Easy Waves small; passages clear; no serious obstacles.
Class II: river tay stanly sort section of rapids more exciting in high water
Medium Rapids of moderate difficulty with passages clear. Requires experience plus suitable outfit and boat.
Class III: river tay aberfeldy to grandtully idea for all ages
Difficult Waves numerous, high, irregular; rocks; eddies; rapids with passages clear though narrow, requiring expertise in maneuvering; scouting usually needed. Requires good operator and boat.

