Long boat surfing at 7ft and above

More great info from the river encyclopedia, Adam VG:

Long Boat Surf-spots Above 7 Feet (Little Falls Gauge)

Skull Island Wave

Long River Runner: 6.6 - 7.3

Slalom Boat: 7.1 - 7.8

Sweetie Pie Wave (aka Back Channel Wave)

Long River Runner: 7.4 - 7.9

Slalom Boat: 7.9 - 8.2

Dead Cow Wave

Long River Runner: 8.6 - 8.9

Slalom Boat: 8.8 - 9.3

River Bend Wave (River Right at Right-Turn Elbow in Mather Gorge)

Long River Runner: 8.1 - 8.5

Slalom Boat: 8.3 - 8.8