One of the biggest impediments to getting on the river regularly is just getting to the water. This site seeks to make that task a lot easier by collecting every access point to local rivers I know of, clearly displayed on Google's maps or high resolution satellite imagery.

You can use the maps on this website, or download the entire kmz file to be able to use Google Earth's more extensive mapping tools. The information is practically identical on the site or in the kmz file, but the file does include some extra information and Google Earth allows a lot more manipulation of the maps and data.