Brown / sea trout · Salmo trutta

Brown / sea trout in the Sandon Brook (Main Reaches)

Largest measured brown / sea trout: 36.1 cm

The largest brown / sea trout measured in Environment Agency surveys of the Sandon Brook (Main Reaches) was 36.1 cm, recorded at Graces Walk on 10 May 2013.

Across 24 measured brown / sea trout, the median measured length was 17.9 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Sandon Brook (Main Reaches).

See brown / sea trout records across England →

Most recent observation8 May 2025Graces Walk · 4 fish

Largest measured brown / sea trout: 36.1 cm
Median length: 17.9 cm
Fish measured: 24
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.

Length	Survey date	Survey location	Survey ID
36.1 cm	10 May 2013	Graces Walk	137520
32.2 cm	9 May 2007	Graces Walk	105385
27.9 cm	8 May 2025	Graces Walk	177233
27.4 cm	10 May 2013	Graces Walk	137520
27.1 cm	8 May 2025	Graces Walk	177233
25.6 cm	10 May 2013	Graces Walk	137520
25.4 cm	29 May 2019	Graces Walk	155997
24.8 cm	2 May 1995	Graces Walk	14496
23.4 cm	29 May 2019	Graces Walk	155997
20.6 cm	1 May 1995	Baddow Fruit Farm	14495

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 surveyed	First recorded	Last recorded	Visits finding brown / sea trout
Graces Walk	2 May 1995	8 May 2025	6
Boreham Bridge (Sandon Brook)	4 Jun 2001	4 Jun 2001	1
Baddow Fruit Farm	26 Apr 1989	1 May 1995	2

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

1989–2025

Survey records by year

Each bar shows how many survey visits recorded brown / sea trout that year.

189

090

091

092

093

094

295

096

097

198

099

000

101

002

003

004

005

006

107

008

009

010

011

012

113

014

015

016

017

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 24 measured fish were spread across different length ranges.

Smallest: 5.5 cm
Lower quarter: 16.8 cm
Median: 17.9 cm
Upper quarter: 25.5 cm
Largest: 36.1 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Sandon Brook (Main Reaches)

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

Chub European eel Roach Dace Pike Gudgeon

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 →