RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Calder

Largest measured brown / sea trout: 22.5 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Calder was 22.5 cm, recorded at 1851.50 Ponsonby Lonning, Sellafield, River Calder on 31 August 2023.

Across 960 measured brown / sea trout, the median measured length was 8.2 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 Calder.

See brown / sea trout records across England →

Most recent observation30 September 20251851.50 Ponsonby Lonning, Sellafield, River Calder · 31 fish
Largest measured brown / sea trout
22.5 cm
Median length
8.2 cm
Fish measured
960
Survey locations
18

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
22.5 cm31 Aug 20231851.50 Ponsonby Lonning, Sellafield, River Calder163180
19.2 cm31 Aug 20231851.50 Ponsonby Lonning, Sellafield, River Calder163180
18.5 cm31 Aug 20231851.50 Ponsonby Lonning, Sellafield, River Calder163180
18.1 cm30 Sept 20251851.50 Ponsonby Lonning, Sellafield, River Calder179092
18 cm30 Sept 20251847.00 Monks Cottage, River Calder179091
17.4 cm9 Sept 20211847.00 Monks Cottage, River Calder160333
17.4 cm28 Aug 20191849.00 Near Calder Abbey, River Calder155355
16.5 cm31 Aug 20231851.50 Ponsonby Lonning, Sellafield, River Calder163180
16.5 cm31 Aug 20231847.00 Monks Cottage, River Calder163179
16.2 cm28 Aug 20191849.00 Near Calder Abbey, River Calder155355

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
1851.50 Ponsonby Lonning, Sellafield, River Calder13 Aug 201530 Sept 20255
1847.00 Monks Cottage, River Calder27 Aug 199830 Sept 202520
1851.40 Ponsonby Lonning DS Existing site CPUE5 Sept 202321 Aug 20242
1844.50 Matty's Bend Bridge CPUE26 Sept 202321 Aug 20242
1850.10 Pelham House CPUE13 Aug 202413 Aug 20241
1849.10 Nr Calder Abbey CPUE26 Sept 202313 Aug 20242
1847.01 Monks Cottage DS bridge CPUE5 Sept 202313 Aug 20242
1845.50 Friar Gill20 Sept 200624 Aug 20223
1849.00 Near Calder Abbey, River Calder27 Aug 199828 Aug 20195
1846.00 Near Strudda Bank, River Calder27 Aug 199819 Aug 20153
1845.00 Upstream Worm Gill4 Sept 199818 Aug 20154
1844.00 Near Simon Kell, River Calder26 Aug 199818 Aug 20152
1853.00 Downstream Sellafield, River Calder22 Sept 199827 Aug 20032
1850.00 Pelham House, River Calder22 Sept 199827 Aug 20032
1852.00 Sellafield Fishpass, River Calder22 Sept 199822 Sept 19981
1851.00 Upstream Sellafield, River Calder22 Sept 199822 Sept 19981
1848.00 Near Priorling, River Calder26 Aug 199826 Aug 19981
Fish Kill18 Jul 199718 Jul 19971

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

1997–2025

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 960 measured fish were spread across different length ranges.

Smallest
5.1 cm
Lower quarter
7.5 cm
Median
8.2 cm
Upper quarter
9.2 cm
Largest
22.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Calder

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

Atlantic salmon European eel

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 →