The Snake River in southern Idaho and eastern Oregon passes through some of the Northwest's most spectacular landscapes, rich in everything from canyon rim hikes to wine and agricultural tours; from Oregon Trail history to vibrant present-day communities.  "Tributaries" are side trips connecting the Water Trail to nearby not-to-be-missed destinations.  They might lead you from the banks of the mighty Snake River to a tasting room in the heart of Idaho's Wine Country, a living-history program at the National Historic Oregon Trail Interpretive Center, or an up close and personal raptor encounter at the World Center for Birds of Prey.