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Difficulty III-IV+
Length 0 Miles
Gauge N/A
Flow Range
Reach Info Last Updated 12/31/2017 5:25 pm

River Description

Quick Facts:

Location: midway between Rockland and Bruce Crossing, 18 miles SSW of Ontonagon, MI.
Shuttle Length: 4.3 miles. (See details in "Directions" Tab.)
Character: A couple short falls, bedrock slides, and undercuts.

Put-in is approximately 959' elevation.
Confluence is approximately 713' elevation.
Thus total elevation change (Baltimore only) is approximately 246'.
Take-out is approximately 661' elevation.
Thus total elevation change (full run) is approximately 298' (for overall gradient of 32 FPM).

The first 2.5 miles of this reach are a quietwater access paddle with very little gradient. Things start picking up as one approaches "Creamy Peanut Butter Falls", a very runnable vertical drop of about 10'. A short distance downstream, Okundekun Falls, about 20' vertical which, while possibly runnable, should be considered a portage (river left) since it mostly lands hard on rock. The fun part of the Baltimore begins below Okundekun Falls with very interesting geology creating a great mix of slides and boulder drops (see rapids details below). Unlike most other challenging runs in the U.P.,  the river bottom is smooth sandstone. (This is the midwest version of slick-rock. In fact, the canyon section downstream makes for some great mountain biking in the summer.) The paddle out on the M.Br.Ontonagon adds 3.9 miles of low gradient paddling (~13 FPM) to this run, and consists of moving water interspersed with a few light rockbed rapids.

Before you change out of your paddling gear, be sure to have a look at Sandstone Creek about 1/2 mile south of the take out, roadside along HWY 45. If you find it boatable, it will be a great 'capper' to your day!

Rapid Descriptions

Access paddle

Class - N/A Mile - 0
Rapid Thumbnail Missing

You'll have a nearly 2.5 mile access paddle before the first real drop. There may be a few areas of minor swifts (riffles and rips), but mostly this will be flatwater. And . . . if you are curious what might exist upstream of our listed put-in . . . miles and miles of pretty much the same -- flatwater, riffles, and riffs, maybe a few very brief low-grade rapids (mostly just waves), and likely many many portages (or deadfall-dodging-and-ducking). There is evidence this may be canoed, but it is hard to recommend as a whitewater trip. And the same may be said of various tributaries.

You will also no doubt notice (most occasions this is boatable) that the water is very muddy/silty. This is due to (1) considerable logging upstream, and (2) mostly loose soils, not the rocky stuff of, say, rivers around L'Anse area.

Creamy Peanut Butter Falls

Class - III+ Mile - 2.5

You'd have to ask one of the old-guard 'Hoofers' (UW-Madison outing club) about the origin of the name. (My bet is the answer might involve the color of these muddy waters bearing striking resemblance to that substance.)

This is a short, sweet ledge/falls.

O Kun De Kun Falls

Class - IV Mile - 2.6

Possibly runnable, but mostly lands hard on shallow rock. Recommended portage.

Let Us Pray

Class - II+ Mile - 2.7

The nearby Michigan community of Mass provides inspiration for names of many of the rapids on this run. "Let us Pray" is a boulder-garden which begins directly below a footbridge immediately downstream of Okundekun falls.


Class - III+ Mile - 3.4

There are a number of class II and III rapids on the way to "Cyclops". The river splits around a rocky island and gradient increases. As you head near the end of the main island, the river drops about 12' in a short, steep slide on each side of the island. Good gradient (class II) continues downstream.

Mass Has Ended

Class - IV+ Mile - 4.7

The river continues its slick-rock class II-III rapids until you take a sharp jig/jog and see remains of a defunct swinging footbridge. Take out river right at the footbridge foundations for a mandatory scout. The canyon below is an awesome spectacle. This is the most challenging section of the river, class IV+ at lower flows pushing into class V when higher. Boulders and shorelines are undercut!  (Generally undercuts are scarce in the Midwest, but abound on this stretch.) It starts with low angle slide sequences, gradually steepening as the rapids continues. The crux comes with a medium angle slide of about 15' just above where the river makes a hard turn right. The river is deflected hard right with an inconvenient boulder on the outside of the bend, then drops off another, slightly steeper slide of about 12' ("The Mass Has Ended"). Scout this whole drop for wood in crux locations before thinking about boating it.

Go In Peace

Class - II+ Mile - 4.8
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The fun is far from over. Below the major drop lies a 200 yard section of sloping sandstone bedrockin a canyon, for a long, squirrelly, low angle slide ("Go In Peace"). There are boulders scattered at random on the surface of this bedrock making a bit of a slalom course. Wood is likely to be trapped between boulders, so plan your route carefully here. Be sure to bring your bike back here in the summer for an excellent ride. Gradient gradually slackens downstream until the confluence with the M.Br.Ontonagon is reached.

Possible egress?

Class - N/A Mile - 5.3
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Maps show a road of some sort heading near the river. We have no present awareness whether this road is gated, private, or if it can be used as an alternate take-out to eliminate the long (mostly flat-but-flowing) paddle out for this run.

Confluence with M.Br.Ontonagon

Class - N/A Mile - 5.9
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Mouth of the Baltimore

Confluence of M.Br+E.Br.Ontonagon

Class - N/A Mile - 9
Rapid Thumbnail Missing

The East Branch has a fine (rather tamer) run.


default user thumbnail
11 years ago

George Kaider This is a really cool run that is an all-day experience in a very remote wide open canyon. The riverbed is very different creating unique rapids, strange side-curling waves, and low head dam type of ledges. It is worth your time and will be a memorable day. We had to walk two stretches due to high water lines that made it very tough whitewater. I think we wimped out on the first section we walked, but the canyon proper section turned into true class V+ after making a dogleg right turn. There were also some death logs crossing the river in here too, so its just the whitewater that is worrisome.

No Gage

Gage Descriptions

Paddlers measure down from the underside of the bridge-deck (at the put-in) on the downstream-river-left side. 12' down is the minimum and 4' down is too high. The max is somewhere between, but this reach hasn't been run enough to confidently set that value. (We welcome user input to more accurately define the sane 'recommended max' for this reach.)

To reduce confusion with 'measure down' gauges, I like to convert the reading to an equivalent positive reading (EPR). Since (for this run) 12' down is the minimum/base-reading, just subtract YOUR 'measure down' reading from 12' and record/report THAT number as the EPR. Using this conversion, the recommended levels are from 0" to 8' (96") EPR. Example#1: you measure down from the aforementioned point on the bridge and find the water at 8'3" (or 99") down. Subtract that from 12' (144") and you have an EPR of 3'9" (45"). If you've run it (or seen photos or descriptions of it) at, say, 1'10" (22") EPR, you quickly figure that you have (something nearly akin to) DOUBLE the relevant gauge height, which is not obvious from the 'measure down' values of 8'3" (99") versus 10'2" (122").

This reach is flashy and may rise and fall rapidly. A more accurate onsite judgement may be had by hiking 1.4 miles in to Okundekun Falls via the North Country Trail from a marked Hwy 45 parking area.

Since many of the slides are fairly broad (in relation to the rest of the reach) this does not make a good low water run. Conversely, the regular bedrock slides create some scary holes when it is high. This duality, combined with the flashy nature of this stream, makes it difficult to catch at a "good" water level. Those who do will find the effort worthwhile.

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






Matt Muir


Revision #Revision DateAuthorComment
1196023 09/14/09 Rob Add rapids/features
1196194 10/12/09 Rob Remove dead link
1196713 11/23/09 Rob Fix/remove broken links.
1197584 03/19/15 Rob migrate rapids descriptions (from main description)
1208624 12/31/17 Rob fix typos
1192433 02/09/09 n/a n/a
1195958 09/09/09 Rob Add abstract.