Free — you'll pick up right here.

Michigan

Rock River

No verdict for this water

We won't guess. Here is exactly what we do and don't know.

What we do know

  • Inside Hiawatha National Forest

    2 managing-area boundaries mapped — agency alerts for them feed this page automatically.

    Boundary data

What's missing

  • No access route mapped

    We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.

Nobody's filed a report here yet — be the first.

Why you'll love it

16.6 mi run
Seasonal — can run dry
44 cfs avg flow

River facts

Water
Seasonal — can run dry
Average flow
44 cfs
Average current
0.7 ft/s
Gradient
14.7 ft/mi
Drainage area
35 sq mi

Long-term averages modeled by USGS (NHDPlus HR), not today's conditions. Check a gauge before you go.

Here's your day on the water, mapped

Rock River

AI-suggested draft · review before you go

Building your full AI plan…
More about this water ↓

Photos

Directions & GPX

Get Directions

Permits & access

Managing agency
Forest Service

About this water

Rock River is a 17-mile paddling stretch near Au Train, Michigan. It is intermittent and may run dry in some seasons. USGS models an average flow of about 44 cfs and a gradient of about 14.7 feet per mile. Land along it is managed by the U.S. Forest Service.

Add to a trip & share

Keep exploring — more water worth the drive

Chocolay River

~27 min drive

Chocolay River is a 19-mile paddling stretch near Marquette, Michigan. It flows year-round. USGS models an average flow of about 153 cfs and a gradient of about 7.1 feet per mile.

Au Train Bay Boat Launch

~6 min drive

Au Train Bay Boat Launch is a boat launch in Michigan.

Au Train Put-In

~8 min drive

Au Train Put-In is a boat launch in Michigan.

Au Train Lake Boat Launch

~9 min drive

Au Train Lake Boat Launch is a boat launch in Michigan.

Forest Lake State Forest Campground Boat Launch - CLOSED

~14 min drive

Forest Lake State Forest Campground Boat Launch - CLOSED is a boat launch in Michigan.

John H. Hammer Public Access

~14 min drive

John H. Hammer Public Access is a boat launch in Michigan.

Ackerman Lake Boat Launch

~15 min drive

Ackerman Lake Boat Launch is a boat launch in Michigan.

Sand River Flooding Boat Launch

~17 min drive

Sand River Flooding Boat Launch is a boat launch in Michigan.

Whitefish River Boat Launch

~21 min drive

Whitefish River Boat Launch is a boat launch in Michigan.

Munising Municipal Ramp Boat Launch

~23 min drive

Munising Municipal Ramp Boat Launch is a boat launch in Michigan.