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Difficulty III+(V)
Length 10.5 Miles
Gauge Walnut Creek Upstream Pool, near Erie, PA
Flow Range 4.90 - 6.25 FT
Flow Rate as of: 17 minutes ago 3.12 [FT]
Reach Info Last Updated 06/09/2016 2:09 pm

River Description

This is a really beautiful and challenging reach close to Erie. Like many other Erie tribs, this creek is in an isolated shale gorge with cliffs usually on one side or the other and bald eagles. If the ledge at the putin looks a little boney, but doable then you should be fine. If it doesn't look boney then you are in for a fast exhilerating run! Warm-up rapids start right at the putin with fun Class II's for the first couple of miles. After this the run picks up with some more serious ledges and then a wide falls. The falls is about 5 feet high and drops into a common pool with the Gage Gulf (Belson Creek.) Both creeks almost parallel each other just before they both drop into the pool with waterfalls separated by a very thin shale wall. Immediatly downstream the creek becomes extremely narrow and surrounded by cliffs on both sides. Once leaving the pool there is no turning back and you are committed to running this Class V box canyon called The Flume of Doom!



Western New York Area Reaches

Beaver Meadow Creek                     Canadaway Creek (1.)                                      Canadaway Creek (2.) 

Canaseraga Creek                           Cattaraugus Creek                                           Cattaraugus Creek, S. Branch 

Cazenovia Creek, W. Branch (1.)    Cazenovia Creek, W. Branch (2.)                     Chautauqua Creek 

Clear Creek, N. Br.                           Conesus Creek                                              Eighteenmile Creek 

Eighteenmile Creek, S. Br.                Ellicott Creek                                                    Genesee (Letchworth) 

Honeoye Creek                               Keshequa Creek                                            Little Chautauqua Creek 

Murder Creek                                  Niagara                                                             Oak Orchard Creek 

Oatka Creek                                    Rushford Lake Outlet                                       Sugar Creek 

Twentymile Creek


Google Map of New York Whitewater

New York Whitewater Paddlers Facebook Group

Rapid Descriptions

Route 9

Class - II Mile - 0
Rapid Thumbnail Missing

Put in on the north bank of the creek on the downstream side of the Route 9 bridge.

Junction Falls

Class - III Mile - 3.44
The river becomes very wide and suddenly bends to the left. The falls is a good 4 or 5 feet but isn't very tricky. It deposits you into a calm pool below. This area is very isolated and scenic. You will see a waterfall on Belson Creek (the Gage Gulf) entering the pool parallel to Twentymile only seperated by a thin shale wall. Take out in the pool to scout the next rapid.

The Flume of Doom

Class - 5.0 Mile - 3.48
WOW, where'd this bad boy come from you might wonder! Just after Belson Creek pours into Twentymile, you enter a narrow box canyon with steep shale walls rising up 30 feet above your head. The creek becomes very narrow and thunders through several good sized holes. Finally near the end of this flume is a slight drop into an unavoidable MONSTER HOLE!!! This one can point an 11 foot kayak straight up! Staring up, all you will see is hemlocks but I don't think you will get much of a chance to enjoy their esthetic value! Recirulation of the hole can reach downstream as far as 15 to 20 feet so paddle like hell! It is unknown how bad this rapid can be for swimming because I only know that Dave Atkinson and I miraculously made it through right side up. There is easily enough head room to do a roll IF the hole spits you out. A portage is possible on the left side of the creek by getting out just after the falls. To get back down to the creek below the Flume of Doom may require ropes in order to lower boats down. Alternatively, one can walk about 1/2 mile through an oxbow lake area that is swampy and quite unpleasent. To get there, go perpendicular to the left bank and you will come to the big opening. Walk down the old valley until you get back to Twentymile.

Railroad Rapid

Class - II+ Mile - 7.28
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Railroad Rapid is one of the most structured rapids on Twentymile. It has nice eddies and a wavetrain that extends into the pool at the bottom of the rapid. At some levels it is an excellent playspot with good depth for enders and cartwheels.

Snake Falls

Class - III+ Mile - 7.6
Rapid Thumbnail Missing
The creek drops several feet here in a gradual slide ending in a small drop. The deepest route is on the right, but don't go too far right or you will hit the shale wall. The hole is not very sticky though and there is an easy sneak down the left side of the rapid. Fishermen used to fish the pool just below this rapid, but now the area around the rapid is posted. Make sure you don't swim here or you might get busted for trespassing.

Tunnel Falls

Class - II+ Mile - 7.75
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After comming through a tunnel there is an artificial waterfall created by concrete. In general it is not as bad as Marijuannica Falls on Walnut, but the hole can have some kick to it at levels above 1.5 ft at which level this run should probably not be attempted.

Iron Bridge Falls

Class - III+ Mile - 10.1
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This is not really a true falls since most of the creek drops over a steep ledge but is very, very fast and fun! It is fairly long and large standing waves populate the drop with some big holes at the end of the drop. There tends to be a lot of fishermen here in the spring and fall so please be courteous but have fun! If the fishermen are not there, this could be a fun place to surf.

Lake Erie

Class - II Mile - 10.5
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Take out in Lake Erie or Route 5 at the Fish and Boat Commission parking area. If you want to surf waves on the lake it is only 100 or 200 yards from the parking lot.


Gage Descriptions

This is a brand new gauge located on Walnut Creek, PA and is about 25 miles southwest of Twentymile Creek.  It should be accurate most of the time except for localized thunderstorm activity.  Generally, the headwaters of Twentymile get a little more rainfall and snowfall than Walnut.  This is especially true during lake effect events.  Many of the subtitles in the pictures use the levels from the Brandy Run gauge that used to be the linked to this reach.

Directions Description

We have no additional detail on this route. Use the map below to calculate how to arrive to the main town from your zipcode.

No Accident Reports



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Moose River Video

Mark Singleton

2010 marked the 25th anniversary of protecting the Black and Moose rivers!  View an online video documentary on the Moose River and the early role that American Whitewater played in protecting this amazing river.


Alex Barham


Jonathan Janicki


Revision #Revision DateAuthorComment
1206636 06/09/16 Alex Barham Added local info
1191241 04/04/09 Jonathan Janicki n/a