Due to the dams removal project, the river is in a state of change, including this stretch of the Boardman that contains Keystone Rapids, the only recognized rapids in Michigan's lower peninsula.
Keystone Rapids are rated Class I-II, depending on seasonal rains & they stretch about 1/2 - 3/4 mile. This entire stretch of fast water is a mix of large boulders, standing waves with a couple of tight turns.
There is very limited parking (on both sides of the road) and it's sometimes very busy, but there is no off-road parking, in fact it's a fairly bad spot because there's a hill in 1 direction & a curve the other way - use great caution. Oleson Bridge Trail-head is less than 1/2 mile north; there is ample parking there & good trails between sites.
There are miles of hiking trails that are part of the Grand Traverse Natural Education Reserve.
There are seasonal vault toilets at Beitner Park & leashed dogs are welcome.
From Beitner Park to Oleson Bridge is about 1/2 mile & then another 1/2 mile to Lone Pine Trail head.
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