Built for anglers,
by anglers
The current web app focuses on real river intelligence, biological coverage, private Locker journaling, maps, and Safety Check-In. Planned work is marked clearly so the site stays aligned with the product.
River Briefings
At-a-glance intelligence for tracked rivers with clear condition ratings, source freshness, and readable summaries of what is changing.
Condition Ratings
Each river is rated Optimal, Good, or Fair based on visibility, flow, pressure, and temperature.
Visibility & Flow
Real-time USGS clarity and discharge data. Know if conditions are fishable before you drive.
Pressure & Temperature
Current barometric pressure trends and water temperature — key factors for fish activity.
River Briefing Summaries
Concise summaries that combine flow, water temperature, weather, and recent trend context.
Weather Intelligence
Pressure trends, bite windows, incoming changes, activity windows, and short-term forecasts for planning the most productive window.
Pressure & Bite Windows
72-hour barometric pressure trends with bite-window highlights when conditions shift quickly.
Incoming Changes
Spot meaningful weather swings before they hit: pressure, wind, temperature, and precipitation.
Activity Windows
Solunar-based Major and Minor bite windows so you know the best times to be on the water.
Hourly & 7-Day Forecasts
Current conditions, hourly context, and multi-day outlooks for planning and timing.
Fish Passage Intelligence
Live dam count data aggregated from DART, Fish Passage Center, NOAA, and state agencies. Track salmon, steelhead, and other species at major dams.
Dam Counts
Live fish counts from DART, FPC, and NOAA at major Columbia and Snake River dams.
Species Breakdown
Detailed counts by species — Chinook, Coho, Sockeye, Steelhead, and more.
Trend Analysis
24-hour, 7-day, and seasonal totals with sparkline trend indicators.
Regional Agency Coverage
Aggregated data from federal, state, and tribal monitoring programs across the region.
NOAA CO-OPS Tides
Accurate tide predictions for coastal areas and tidal rivers. Essential for salmon, steelhead, and coastal fishing.
- High and low tide times with heights
- Tidal current predictions
- Multiple station support
- Historical tide data
- Context for Locker trips and entries
Your Private Field Journal
Log activities, catches, observations, field notes, and media with environmental snapshots. Explicit sharing via Streams & Drops is planned, but the Locker stays private by default today.
Private by Default
Strong access controls keep your Locker data private to your account unless you choose to share it.
Activities & Entries
Log catches, observations, notes, hazards, and media inside a single field-journal timeline.
Environmental Snapshots
Automatically capture weather, water, and tide conditions alongside your Locker entries.
Export & Deletion
Export your Locker history or delete your account and associated data on your terms.
Return-Time Check-Ins
Safety Check-In is a leading pre-launch feature: a trip timer with overdue escalation, chosen contacts, and groundwork for low-bandwidth use in the field. It is a preparedness tool, not an emergency service.
Trip Timer
Set an expected return time and check-in interval before heading into low-service water or road access.
Chosen Contacts
Add trusted contacts for overdue notifications instead of broadcasting your plans publicly.
Overdue Escalation
If a timer expires, the server-side workflow can escalate status and send reminders to your selected contacts.
Low-Bandwidth Groundwork
Safety Check-In is being built with offline-first and constrained-network support in mind.
Interactive Maps
Explore river conditions with overlays, weather layers, station popups, and search. Full offline sync and cached map tiles are planned in a later phase.
River Condition Overlays
See river geometries colored by live conditions for quicker planning across the basin.
Weather Layers
Toggle wind, precipitation, pressure, radar, and temperature layers directly on the map.
Station Popups
Inspect nearby monitoring stations with quick access to recent readings and status.
Search & Location
Search rivers or stations, center on results, and use your location for field context when you allow it.
Built for Privacy
Privacy is the product model: private Locker ownership first, explicit sharing later, and no public feed or public heatmap.
Privacy by Design
Built from the ground up with privacy as a core principle, not an afterthought.
Streams & Drops (Planned)
Explicit sharing is on the roadmap. Nothing is public by default, and there are no public heatmaps.
Minimal Data Collection
We only collect what is needed to operate the product, with location captured when features require your permission.
Transparency & Control
Clear documentation, export/delete controls, and a product model built around private ownership.
Available on web and mobile
The web app works today on desktop and mobile browsers. Native iOS and Android apps are planned after the web experience stabilizes, with fuller offline sync and cached map tiles in that later phase.
Web App
Live today with river intelligence, maps, biological data, Locker, and Safety Check-In.
Available NowiOS App
Native mobile parity is planned after the current web workflow is stabilized.
Coming SoonAndroid App
Android parity is planned alongside the mobile and offline phase.
Coming SoonReady to try Thalweg?
Open the pre-launch web app and explore river intelligence, Locker journaling, and Safety Check-In.
Pre-launch web access is available now. Pricing details are still being finalized.