You wouldn't think a kayak launch would need a sign like this

You might be confusing this with the wide open expanses along the Charles River in Brighton or the Back Bay.

The Charles River along Millennium Park is really more of a nature preserve than a well manicured lawn. The stretch in question consists of thick cattail-type things, scrub and trees. There's a dirt path along the river which has some nice views of the river in the spring, but then the cattails grew tall and dense enough to block the river for most of the way.

The kayak launch is at the end of another path, a short, narrow path down to the water, surrounded by trees and brush - you know, just the sorts of things that could easily go up in flames after we've gone without rain for a couple weeks - and not really wide enough to support a party, kayakers and the occasional people who just like going down to the series of concrete platforms leading into the water and sitting there and watching the birds and the river go by. Oh, yeah, and also: All the unleashed dogs whose owners set them to running down into the river to chase balls (benign) or birds (come on).