The GPS info you are looking for is on the float map you will get at the put in when you get your boat tags from the ranger. The map is called Smith River State Park & River Corridor Recreation Map. You may be able to get one online before hand at www.riverratmaps.com. The map has GPS for all camp sites and points of interest like pictographs and such. It also has lot of general floating and area info. Also if you google" Montana stream flow" you will get the USGS water flow site. Go to Upper Missouri River Basin and scroll down to Smith River, eagle Cr. and Smith R. near Eden. These guages are just below the put in and a little above the take out. Enjoy the float, it's a good one.
A couple Belt Crk shots. As Glenn eluded, wood can be an issue. Fortunately, it is a state park and the rangers will attempt to survey it pretty early and even clear it if necessary. It is very vertical in the Sluice Box section with incredibly deep undercuts, when it's low there are caves you can enter entirely coated with crystals. At floatable levels you don't even know they are there. The only other hazards are old metal and concrete bridge piers. There used to be a railroad that went through this valley. Take home message is "stay in the boat!"
East MT, WestMT, Both sides of the Yellowstone
Paddling Since: 09
Join Date: Jun 2011
Theres a sweet boat cave river right at the top of the canyon, we put 3 boats in it and checked out the crazy big room in there. It looked like folks had camped in there but it was a bit musty and there was a dead rat in there.