RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Blackwater

Largest measured brown / sea trout: 44.2 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Blackwater was 44.2 cm, recorded at Riseley on 16 April 2019.

Across 53 measured brown / sea trout, the median measured length was 21.2 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 Blackwater.

See brown / sea trout records across England →

Most recent observation8 April 2025Riseley · 1 fish
Largest measured brown / sea trout
44.2 cm
Median length
21.2 cm
Fish measured
53
Survey locations
3

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
44.2 cm16 Apr 2019Riseley154458
42.5 cm8 Apr 2025Riseley176231
41.5 cm3 Apr 2009Riseley117160
39.6 cm20 Apr 2005Riseley84437
35.3 cm28 Apr 2006Riseley90816
31.5 cm3 Apr 2009Riseley117160
31.4 cm28 Apr 2006Riseley90816
29.5 cm8 Apr 2003Riseley75804
28.6 cm8 Apr 2004Eversley Cross79772
28.4 cm20 Apr 2005Riseley84437

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
Riseley4 Apr 20028 Apr 202511
Coleford Bridge25 Apr 201325 Apr 20131
Eversley Cross7 Dec 199015 Apr 20106

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

1990–2025

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 53 measured fish were spread across different length ranges.

Smallest
11.1 cm
Lower quarter
16.7 cm
Median
21.2 cm
Upper quarter
25.6 cm
Largest
44.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Blackwater

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

Roach Chub Gudgeon Pike Dace Perch

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 →