what I remember:
a family is river rafting somewhere in the states, kurt russell plays the dad. they find kevin bacon and some dude also rafting. bacon has a hair that looks like a hedgehog. bacon is good but soon turns out to be bad. a dog finds a dead body. bacon forces the family to help them get to the river delta because he is a bank robber and escaping the police with bags of money. the family helps the bad guys reluctantly. family manages to escape. the guys get killed in a waterfall or something.
how's the memory:
THERE'S NO KURT RUSSELL IN THE WHOLE MOVIE. otherwise the plot is more or less like the one described, with some added small plot threads, like the one with the park ranger johnny. kevin bacon's hair looks like a hedgehog.
(photo: http://en.wikipedia.org/wiki/The_River_Wild)