RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the Mosedale Beck

Largest measured brown / sea trout: 21 cm

The largest brown / sea trout measured in Environment Agency surveys of the Mosedale Beck was 21 cm, recorded at 1554.00 Wallthwaite, Mosedale Beck on 7 August 2025.

Across 49 measured brown / sea trout, the median measured length was 8 cm.

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

See brown / sea trout records across England →

Most recent observation7 August 20251554.00 Wallthwaite, Mosedale Beck · 10 fish
Largest measured brown / sea trout
21 cm
Median length
8 cm
Fish measured
49
Survey locations
1

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
21 cm7 Aug 20251554.00 Wallthwaite, Mosedale Beck177733
17 cm6 Sept 20211554.00 Wallthwaite, Mosedale Beck160346
16 cm7 Aug 20251554.00 Wallthwaite, Mosedale Beck177733
15 cm9 Aug 20241554.00 Wallthwaite, Mosedale Beck167097
14.8 cm10 Jul 20231554.00 Wallthwaite, Mosedale Beck162556
14.2 cm9 Aug 20241554.00 Wallthwaite, Mosedale Beck167097
13.5 cm10 Jul 20231554.00 Wallthwaite, Mosedale Beck162556
13.5 cm10 Jul 20231554.00 Wallthwaite, Mosedale Beck162556
13.4 cm10 Jul 20231554.00 Wallthwaite, Mosedale Beck162556
13.3 cm7 Aug 20251554.00 Wallthwaite, Mosedale Beck177733

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
1554.00 Wallthwaite, Mosedale Beck26 Jul 20027 Aug 202510

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 49 measured fish were spread across different length ranges.

Smallest
5.6 cm
Lower quarter
7.1 cm
Median
8 cm
Upper quarter
11 cm
Largest
21 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Mosedale Beck

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

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 →