Hazard Warning: Hazard information may be user-submitted and unverified. Conditions change frequently. Always scout rapids and obstacles yourself.
Waterfall WI Class III+

Granddad Ledge - Main (Left) Line

Wisconsin - C) Grandfather Falls (1 mile) (WI)

Monitor this Rapid
Gauge Conditions
Wisconsin River at Merrill, WI Downstream Primary
Runnable: 2,820.0 – 12,800.0 CFS

Likely too low for decent whitewater on most of run. (Only 'fish flow' of ~50 cfs.)

Data from American Whitewater & USGS
Photo
Granddad Ledge - Main (Left) Line
Photo courtesy of American Whitewater
Description

While not all that tall a ledge, this develops a pretty mean-looking hole at quite a variety of flows, so is definitely worth a scout (and likely a portage). Sneak lines to the left were popular choices during the flow study, with the hole only being punched at 2000 cfs in the channel (when the hole appeared to be flushing best).

Check out the following video, scouting the ledge (no boater in video) at 3600 cfs on the Merrill gauge:
(Note: This was from summer of 2017, while the penstock was being replaced, so all flow was in the river channel.)

Location
Type
Waterfall
Difficulty
Class III+
Mile Marker
0.5 mi
Directions
Navigate
View Full Run
C) Grandfather Falls (1 mile)
Wisconsin
II-III+(IV) 0.9 mi
Hazard — Exercise extreme caution in this area.
Current Conditions
5-Day Forecast
Whitewater data from
American Whitewater