RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Darent

Largest measured brown / sea trout: 51.4 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Darent was 51.4 cm, recorded at Park Farm on 22 September 2011.

Across 853 measured brown / sea trout, the median measured length was 24.9 cm.

Surveyors recorded weights for 74 brown / sea trout. The median was 7.6 oz (0.2145 kg) and the largest recorded weight was 1 lb 9.7 oz (0.729 kg).

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

See brown / sea trout records across England →

Most recent observation22 July 2026Twitton Brook · 7 fish
Largest measured brown / sea trout
51.4 cm
Median length
24.9 cm
Fish measured
853
Survey locations
9

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
51.4 cm22 Sept 2011Park Farm128091
48.2 cm5 Oct 2011Twitton Brook128592
48.2 cm5 Oct 2011Twitton Brook128592
47.7 cm10 May 2017Twitton Brook150434
47.5 cm5 Oct 2011Twitton Brook128592
47.4 cm5 Oct 2011Twitton Brook128592
45.6 cm16 Apr 2015Hawley Hall144602
45.5 cm5 Oct 2011Twitton Brook128592
45.5 cm5 Oct 2011Twitton Brook128592
45 cm5 Oct 2011Twitton Brook128592

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
Twitton Brook26 Aug 200322 Jul 202616
Preston Farm4 Sept 200211 Jun 202617
Lullingstone13 Sept 200710 Jun 202610
Sundridge8 Sept 20033 May 20227
Quebec House Car Park Westerham21 Jun 201128 Apr 20223
Horton Kirby30 Apr 201930 Apr 20191
Park Farm22 Sept 201125 May 20172
Hawley Hall16 Apr 201516 Apr 20151
Westerham4 Jul 200311 May 20042

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

2002–2026

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 853 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
14.7 cm
Median
24.9 cm
Upper quarter
32.9 cm
Largest
51.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 74 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.2 oz (0.005 kg)
Lower quarter
3.4 oz (0.0952 kg)
Median
7.6 oz (0.2145 kg)
Upper quarter
13.2 oz (0.374 kg)
Heaviest
1 lb 9.7 oz (0.729 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Darent

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

Gudgeon Bullhead Roach Perch Stone loach Pike

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 →