RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Gaunless

Largest measured brown / sea trout: 32.5 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Gaunless was 32.5 cm, recorded at River Gaunless Spring Garden u/s flood defence on 25 September 2025.

Across 4,617 measured brown / sea trout, the median measured length was 7.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Gaunless.

See brown / sea trout records across England →

Most recent observation26 September 2025River Gaunless at The Slack · 266 fish
Largest measured brown / sea trout
32.5 cm
Median length
7.7 cm
Fish measured
4,617
Survey locations
13

Individual EA measurements

Largest measured brown / sea trout

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
32.5 cm25 Sept 2025River Gaunless Spring Garden u/s flood defence179394
28.5 cm13 Sept 2009River Gaunless at Auckland Castle121094
28.2 cm13 Sept 2009River Gaunless at Auckland Castle121094
27.7 cm3 Aug 2009River Gaunless at Spring Garden119283
27.4 cm6 Aug 2010River Gaunless at The Slack124521
26.3 cm2 Oct 2023River Gaunless at Spring Garden164407
26.3 cm3 Aug 2009River Gaunless at Spring Garden119283
25.7 cm2 Oct 2023River Gaunless u/s of Spring Garden164442
25.7 cm3 Aug 2009River Gaunless at Spring Garden119283
25.2 cm25 Sept 2025River Gaunless Spring Garden u/s flood defence179394

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where brown / sea trout were found

Each point marks a survey location with at least one brown / sea trout record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding brown / sea trout
River Gaunless at The Slack11 Sept 200226 Sept 202517
River Gaunless at Spring Garden18 Sept 200325 Sept 202512
River Gaunless Spring Garden u/s flood defence25 Sept 202525 Sept 20251
River Gaunless at South Church24 Aug 20115 Oct 20235
River Gaunless at Hummer Beck18 Sept 20035 Oct 20234
River Gaunless at Fylands Bridge18 Sept 20075 Oct 20235
River Gaunless u/s of Spring Garden2 Oct 20232 Oct 20231
River Gaunless at Lowlands18 Sept 200327 Sept 20235
River Gaunless at Evenwood18 Sept 200327 Sept 20234
River Gaunless at Copley18 Sept 200326 Sept 20234
Hummer Beck at Hummer Beck Farm24 Jul 20065 Sept 20234
River Gaunless at Auckland Castle19 Sept 200316 Jul 20174
River Gaunless at Ramshaw14 Sept 200722 Aug 20112

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2002–2025

Survey records by year

Each bar shows how many survey visits recorded brown / sea trout that year.

Fish measured by surveyors

Measured length distribution

See how the 4,617 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
6.4 cm
Median
7.7 cm
Upper quarter
11.5 cm
Largest
32.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Gaunless

Compare other species with enough survey and measurement data for a detailed page.

Bullhead Minnow Stone loach 3-spined stickleback European eel Atlantic salmon

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →