Mad River

Mad River Run

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DifficultyI-II
Length4 mi
Avg Gradient2 fpm
GaugeMad River Near Dayton Oh
Flow Rate as of 34 minutes
3.04 ftmedium runnable
Reach Info Last UpdatedJuly 9, 2025

River Description

Mad River Run is a 4.0 mile stretch from Harshman Road to the confluence with the Great Miami River. Shuttles can be arranged from Whitewater Warehouse, immediately North of the river at Keowee Street. The takeout eddy is slightly downstream of the store, from which you will walk up the grass hill to the bike path and from there a short distance to the parking lot. The river is heavily paddled throughout the summer months.

Access this stretch from Eastwood MetroPark (1385 Harshman Rd.). Best access for the full run is just inside the park on the right (near Harshman Road) where there is a changing area. Previously, most boaters would focus on park-and-play, driving 3/4 mile into Eastwood MetroPark to use the large parking lot (with restrooms) near the former main whitewater feature. Access from river-right is also available with limited parking (1401 Harshman Rd.) from the lakeside of Eastwood MetroPark. Again, drive 3/4 mile inside the park to the parking area.

The drop was one element of the Mad River Run project, funded largely by a generous donation from the Rotary Club of Dayton. This was created just below “Bernie’s Hole”, which was formed by the 84” water main pipe that supplies a majority of the water for the city, which became protected underwater by raising the water level (by the rock damming for the new feature which was created). At one point, there was a plan that when funding was acquired, three more drops would be constructed just downstream. This never happened.

In February 2023, the underwater rock shelf above the first drop collapsed into the pool below, causing several effects. Among them:

- The water main pipe and Bernie's Hole were re-exposed and now present a hazard (do not let it window-shade you; one person who did suffered a cut right below his eye and required stitches); it is best avoided by portaging river right or going around the pipe on far river right (the Whitewater Warehouse folks have been trying to main

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River Features

Harshman Road put-in and small ledge

Distance: 0.03 mi
Hazard

Parking is on the west side of Harshman Road and south side of the river, just inside Eastwood MetroPark. Enter the park at the traffic light (not at the lake entrance) and take the first right inside the park and follow the driveway down to a loop with a changing room. River access is by walking down the bike path underneath Harshman Road to the gravel beach just in front of a DANGER sign. If you are more adventurous, you can walk past the DANGER sign through the brush and around the corner to a spot with some good ferry practice and a small one-foot ledge that you can run (Class II). At higher water, there is a roughly four-foot-tall slide above this ledge that can also be run (Class III), but wood is frequently present and so this is very rarely done. Those choosing the more standard put-in will be in a small eddy, and it is not difficult to ferry across the river into a larger eddy on river right. Large groups will want to do this to make room for more to get in. As you start downriver, watch out for a piece of rebar sticking up in the middle of the river underneath the bridge (at 4+ feet this is submerged).

Gravel Bar

Class: IDistance: 0.52 mi
Rapid
Gravel Bar

A gravel bar/island which previously defined this rapid was mined out, and is now reforming back. Wood/strainers often catch on the banks on both sides.

Go river right of the island (river left is too shallow to paddle). The current speeds up and there are eddies both left and right to practice ferrying and eddy hopping. While most of the river is quite shallow, the main channel through here is deep enough to roll if you want to practice your roll in moving water.

Bernie's Hole

Class: IIDistance: 0.94 mi
Portage
Hazard
Rapid

Bernie's Hole is created by an exposed water main pipe that provides most of the drinking water for the City of Dayton. The pipe creates an effect similar to a very weak low-head dam; it can be run straight on, but it is safer to portage river right or run river right; the Whitewater Warehouse folks have at times attempted to maintain a shallow but runnable slide on the right as a safer option. As of spring 2025, with the removal of the center island of the old first drop and stabilization of the bleachers, it is now safe again to go far river left as well (previously the current on this side fed directly into an undercut).

Surfing this hole is NOT recommended; the pipe has exposed sharp metal waiting for anyone to be window-shaded. One person who tried this in 2023 shortly after the collapse got window-shaded and was cut just below his eye, requiring stitches; less than an inch of difference and he could have lost an eye. Don't risk it.

Eastwood MetroPark main parking access

Distance: 0.98 mi
Access Point

Access point near the main parking lot of Eastwood MetroPark. From the river, look for a small beach on river left just above the old second drop. From the parking lot, go toward the shelter and look for a gap in the trees. The two are connected by a steep, but manageable slope.

I suppose you can put in here if you want to completely avoid Bernie's Hole, but otherwise there's not much point in using this as a planned access. This is more useful as an emergency access point (in case of injury, etc.) or as a place to stop for a bathroom break (there are restrooms on the opposite side of the parking lot).

Mad River Run second drop

Class: IIDistance: 0.99 mi
Rapid

What used to be the second drop of Mad River Run before the collapse. This drop survived but is slightly more aggressive now without the first drop holding back water, and its character has changed again with the removal of the center island.

To run this straight, follow the green tongue on river right (it's further right than you think while sitting in the pool above) into a small wave train. Surfers will want to get into the eddies on either side and work their way across, hopping from wave to wave as well as a small eddy or two amidst the controlled chaos. This is not an easy place to surf, and you won't be doing any tricks, but it's good skill practice.

Railroad

Class: IIDistance: 1.25 mi
Rapid
Railroad

Marked by three former railroad bridge abutments -- the bridge itself is long gone. The center abutment offers some interesting attainment practice -- you can do laps around it until you get tired.

For running this, start from between the center and river right bridge abutments to ride small waves, working eddies and pourovers by the concrete revetment under the bikeway.

There are some surfing options here as well: The top wave/hole can be caught on the fly with a little practice and luck, and below it are some surfable waves with reasonable eddy service. Once you progress past this point, a couple of the waves below are also surfable if caught right.

S-Turn

Class: IIDistance: 2.43 mi
Rapid

After passing the Findlay St bridge, the river splits in two around an island. Go right, following the current (the left side is too shallow usually). The current will carry you around to a gap between two islands, at which point you'll switch over to the left side (again, following the current). This part is simple Class I moving water, but as you reach the end of the second island, you enter a stretch of Class II boogie water that lasts for a short while. At common summer levels, you can bump up against some submerged rocks here. Once you're through this, you're home free.

Whitewater Warehouse access

Distance: 3.24 mi
Take Out

Take-out at Whitewater Warehouse for those not wanting to paddle down to RiverScape MetroPark. Climb out at the eddy that cuts back into the river right bank, walk up through the grass (beware of goose poop) to the bike path and then follow the bike path a short distance upstream to the back of Whitewater Warehouse. This can also be used as a put-in to run down to the RiverScape and Art Institute features.

RiverScape MetroPark take-out

Distance: 4.01 mi
Take Out
RiverScape MetroPark take-out

Take-out at river-left, walk up the levee through RiverScape MetroPark to parking spots on Monument Ave in downtown Dayton. On evenings and weekends, the Miami Conservancy District parking lot off of Jefferson St is free public parking and makes a nice place to change and debrief (please be courteous and use a pop-up changing tent or a changing robe if you need to expose your parts).

Just below this take out are two great man-made drops on the Great Miami River thanks to donations made by the community through the Downtown Dayton Partnership.


AM
Austin Miller

Nov 2, 2017


Checked out the wave on 11/2/17 at 1100cfs. There were no real play opportunities. The river left wave is totally washed out and the river right feature is blocked off. Not much in terms of play available.

AM
Austin Miller

Feb 8, 2017


Went on 1/24/17. The river was running ~900cfs. The river right feature was blocked by large rocks with no water flowing through. This looks like a permanent closure. On the far river right, the river has eroded a channel around both features. The river right feature was barely surfable. I was flushed very easily. Just downstream and left of center there is a surfable hole with eddy service on the left. It looks a bit shallow to do anything other than spins.

GK
Greg Karjala

Apr 27, 2016


Scouted last weekend, (4/24/16) but went to Buck Creek due too shuttle issues. Didn't look like play-boat nirvana @ 650 cfs but i ran it late last year @ 800 cfs+ and it was fun, though I'm not a play-boater. Middle slot was closed, maybe permanent, idk. Whitewater Warehouse in Dayton good resource for this run, they have a weekly shuttle thing plus other events, and are a GREAT Outfitter locally, good source for paddle kharma!!! Planning on going soon, tmmrrw even (4/29/16), i'll report if so. Construction at put-in, maybe problem weekdays, i'll report. Looks improved over last year. I'm gkarjala@gmail.com if I can be of any assist.

Ryan Groth
Ryan Groth

Mar 5, 2015


Mad River hole surfing

Ryan Groth
Ryan Groth

Mar 5, 2015


Tandem sales into the hole

SO
Sean O'Malley

Jun 14, 2014


Pretty easy to get popups in a river runner at this level. Not sure if it's deep enough to accommodate a long boat, though.

SO
Sean O'Malley

Jun 7, 2014


Center chute is too shallow to be useful at this level.

JB
John Black

Mar 22, 2014


On 3/21/2014 there was a strainer in the wave train below the main slot. See photo.

JB
John Black

Mar 22, 2014


All 3 chutes are running but only river left is navigable. A flood damaged the construction on the river left bank, so you have to enter on the right. On this day, there was a big strainer in the wave train. (See other photo)

JB
John Black

Mar 22, 2014


620 cfs