Scientific Anglers Sonar Stillwater Intermediate
Scientific Anglers Sonar Stillwater Intermediate
Couldn't load pickup availability
A Controlled Descent. More Time in the Zone.
The Scientific Anglers Sonar Stillwater Intermediate is a new-for-2026 fly line designed for a controlled, moderate descent when stillwater trout are holding below the surface. Its 1.7 ips intermediate density keeps flies riding slightly beneath the surface while providing a steady, predictable sink rate that makes it easy to fish a consistent depth.
The 45-foot head provides the mass needed for long casts, long leaders, and multiple-fly rigs, while the line's overweighted design helps load the rod and turn over these specialized stillwater presentations.
Why We Like It:
The Intermediate fills an important gap between the ultra-slow Hover and faster-sinking Sonar Stillwater options. When you need to get below the surface and stay there without dropping rapidly through the water column, the steady 1.7 ips sink rate gives you a simple, repeatable way to maintain depth.
Find the Right Depth
Steady Sink. Consistent Depth. More Effective Stillwater Fishing.
The Sonar Stillwater Intermediate is built for anglers who want more control over where their flies are fishing. Its intermediate density provides a consistent 1.7 ips descent, allowing flies to ride slightly below the surface and gradually reach deeper feeding zones.
Textured hang markers at 10 and 20 feet from the tip provide useful reference points during retrieves, while the long 45-foot head helps maintain line control at distance.
Key Features
- New for 2026
- Designed specifically for stillwater trout
- 1.7 ips intermediate sink rate
- Provides a controlled, moderate descent
- Keeps flies riding slightly below the surface
- 45' head for long casts and line control
- 100' total length
- Overweighted by two line weights for multiple flies, long leaders, and longer casts
- Textured hang markers at 10' and 20' from the tip
- AST Plus coating for superior shooting ability and increased durability
- SA Line ID for quick line identification
- Welded loops for easy leader and backing connections
- Light Gray/Olive Drab color
- Designed for freshwater trout fishing in cold and medium water temperatures
Specifications
| Item Number | Line Weight | Head Length | Total Length | Head Weight | Grain Weight* |
|---|---|---|---|---|---|
| 149143 | WF-5-I | 45.0' | 100.0' | 280 gr | 185 gr |
| 149150 | WF-6-I | 45.0' | 100.0' | 320 gr | 210 gr |
| 149167 | WF-7-I | 45.0' | 100.0' | 365 gr | 240 gr |
| 149174 | WF-8-I | 45.0' | 100.0' | 425 gr | 280 gr |
*Grain weight measured over the first 30 feet.
Density: Intermediate
Sink Rate: 1.7 ips
Color: Light Gray/Olive Drab
Technology: AST Plus, Audible Reference Point, Camo, SA Line ID, Sonar, Welded Loops
Water Type: Freshwater
Water Temperature: Cold, Medium
Fishing Type: Streamers, Nymphs
Species: Trout
Important Line Weight Information
The Sonar Stillwater Intermediate is overweighted by two line weights. Select the line weight designated for your rod rather than sizing down based on the actual grain weight.
Share
