RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Great Gill, Mossdale

Largest measured brown / sea trout: 25.8 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Great Gill, Mossdale was 25.8 cm, recorded at Great Gill, u/s Mossdale on 23 July 2013.

Across 85 measured brown / sea trout, the median measured length was 11.7 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 Great Gill, Mossdale.

See brown / sea trout records across England →

Most recent observation6 August 2025Great Gill Mossdale Head (u/s waterfall) · 16 fish
Largest measured brown / sea trout
25.8 cm
Median length
11.7 cm
Fish measured
85
Survey locations
2

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
25.8 cm23 Jul 2013Great Gill, u/s Mossdale137429
23.8 cm23 Jul 2013Great Gill, u/s Mossdale137429
23.3 cm23 Jul 2013Great Gill, u/s Mossdale137429
22.4 cm5 Aug 2025Great Gill, u/s Mossdale177763
21.6 cm23 Jul 2013Great Gill, u/s Mossdale137429
21.2 cm28 Aug 2019Great Gill, u/s Mossdale155517
20.9 cm16 Oct 2001Great Gill Mossdale Head (u/s waterfall)62320
20.9 cm16 Oct 2001Great Gill Mossdale Head (u/s waterfall)62320
20.1 cm23 Jul 2013Great Gill, u/s Mossdale137429
19 cm23 Jul 2013Great Gill, u/s Mossdale137429

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
Great Gill Mossdale Head (u/s waterfall)16 Oct 20016 Aug 20253
Great Gill, u/s Mossdale5 Jun 20075 Aug 20254

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

2001–2025

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 85 measured fish were spread across different length ranges.

Smallest
4.8 cm
Lower quarter
7.8 cm
Median
11.7 cm
Upper quarter
16.3 cm
Largest
25.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

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 →