About
Madison River Fishing Reports
An independent information resource for Montana's Madison River. We publish daily fishing reports synthesized from real-time gauge data and a library of reference guides for anglers planning a trip.
What this site is
Madison River Fishing Reports is a single-purpose website covering the 140 miles of Madison River from Yellowstone National Park to Three Forks, Montana. We publish two things: (1) automatically generated daily fishing reports that combine current conditions with seasonal patterns, and (2) editorial reference guides covering hatches, access points, regulations, and tactics.
We are not a fly shop, guide service, outfitter, or lodge. We do not accept paid placements, affiliate revenue from gear retailers, or sponsored content. The site exists to be a clean, neutral source of information — the kind of page you want to bookmark before a trip.
How the daily reports are generated
Every 12 hours (1:00 AM and 1:00 PM Mountain Time), an automated worker pulls live data from three sources and synthesizes a report using a large language model:
- USGS National Water Information System — flow rate (CFS), water temperature, and gage height from gauge 06038800 (Kirby Ranch, Upper Madison) and gauge 06041000 (McAllister/Three Forks, Lower Madison).
- NOAA — current weather conditions from stations near West Yellowstone and Ennis.
- Historical hatch and pattern library — a curated dataset that maps water temperature, flow, and time of year onto likely hatches and recommended fly patterns by section.
The model output is the report you see on the homepage: section-specific conditions summary plus three to five suggested fly patterns with sizes and colors. A human reviews unusual readings (sensor errors, extreme temperatures, dam events) and can override or annotate before publishing if needed.
Reports are clearly machine-generated. They are not first-hand accounts of fish caught. For first-hand intel, talk to the fly shops in Ennis, West Yellowstone, and Bozeman — they're on the water every day.
How the reference guides are produced
Every page under Seasons, Hatch Chart, Access Points, Regulations, Salmonfly, Winter, Beginner's Guide, and How to Read Flow Data is editorially curated. Hatch timing, fly patterns, GPS coordinates, and regulation text are sourced from primary records (Montana FWP regulation handbook, USGS gauge metadata, published Madison River entomology references) and reviewed against current-year conditions before publication.
Pages display an explicit dateModified in their structured data and a
last-updated reference where it matters (especially the regulations page). When
regulations change mid-season, we update.
Data sources we cite
- USGS National Water Information System — flow, gage height, water temperature
- NOAA / National Weather Service — weather and forecast data
- Montana Fish, Wildlife & Parks — regulations, license requirements, season dates, fishing access sites
For the freshest data, follow the source links directly — we do not cache or modify the underlying readings.
What we don't do
- We don't sell gear, lodging, or guide trips.
- We don't take affiliate commissions.
- We don't accept sponsored content or pay-for-placement links.
- We don't publish unverified rumors or angler-submitted reports.
- We don't track personal data beyond standard server logs and aggregate analytics.
Get in touch
Spot an error, dead link, or out-of-date regulation? Want to suggest a topic? Email [email protected] or visit the contact page.