Disappointed anglers are delaying or canceling their vacations this year with Montana's blue-ribbon trout streams running higher and dirtier than in recent memory. The murky water is the result of spring flooding and the runoff pouring off the mountains from a record winter snowpack. Water flows for many of the major rivers are at twice their normal rates or higher, churning up muck and mud that have made the water nearly opaque in some streams. Fishing trip cancellations are running as high as 80 percent in parts of the state. Some fly shops are reporting that their business is off between 38 and 50 percent. Guides and outfitters say their hope now is that the extra water will mean a later fishing season to help them make up their losses.