Live USGS conditions and guide-quality fishing reports for 101 major US trout rivers. Click any river for real-time flow data, active hatches, hot spots, and fly recommendations.
TroutBible is a free fly fishing conditions and planning tool built by Anson, a fly angler with over a decade of experience on trout rivers across the country. It combines live USGS streamflow data, real-time weather forecasts, and AI-assisted fishing reports to give you everything you need before heading to the water — fly recommendations, hatch timing, wadeability ratings, gear setup, and current conditions for over 100 trout rivers nationwide. The hatch timing and river intelligence behind every report reflects real on-the-water knowledge, refined continuously to keep the details as accurate as possible.
Flow data is pulled directly from the USGS National Water Information System, updated every 15 to 60 minutes. Reports are generated using current flow conditions, seasonal hatch charts, and local river knowledge to give you accurate, actionable intel — not generic advice.
TroutBible covers tailwaters, freestone rivers, spring creeks, and limestone streams in every major trout fishing region — Colorado, Montana, Idaho, Wyoming, Oregon, California, Pennsylvania, New York, Michigan, Tennessee, and more. Named river sections like South Platte — Cheesman Canyon, Madison River — Upper, and Henry's Fork — Railroad Ranch each have their own dedicated reports.
Whether you're planning a trip to the South Platte River in Colorado, the Madison River in Montana, the Beaverkill in New York's Catskills, the Delaware River in Pennsylvania, or the Deschutes in Oregon — TroutBible has current conditions and a detailed guide report ready for you.