RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Ash

Largest measured brown / sea trout: 56.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Ash was 56.3 cm, recorded at Holly cross rd/water place farm on 22 June 2006.

Across 2,303 measured brown / sea trout, the median measured length was 19.7 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 Ash.

See brown / sea trout records across England →

Most recent observation18 September 2025Watersplace Farm · 34 fish
Largest measured brown / sea trout
56.3 cm
Median length
19.7 cm
Fish measured
2,303
Survey locations
13

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
56.3 cm22 Jun 2006Holly cross rd/water place farm99920
54.5 cm22 Jun 2006Holly cross rd/water place farm99920
54 cm9 Sept 2008Hollycross Road114337
54 cm19 Nov 2003u/s Ford Waterplace Farm78608
53.4 cm19 Nov 2003u/s Ford Waterplace Farm78608
53.2 cm22 Sept 2012Hollycross Road133752
53.1 cm17 Sept 2015Hollycross Road146489
52.6 cm22 Jun 2006Holly cross rd/water place farm99920
51.5 cm22 Jun 2006Holly cross rd/water place farm99920
51.3 cm30 Jun 2006Much Hadham99923

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
Watersplace Farm10 Oct 200318 Sept 202516
Wareside Fully Quantitative30 Sept 201218 Sept 20258
Hollycross Road22 Oct 200719 Sept 202312
Much Hadham Fully Quantitative30 Sept 20129 Oct 20182
Wareside28 Jun 200618 Sept 20182
Easeneye Weir Removal23 Oct 200723 Oct 20071
Much Hadham30 Jun 200630 Jun 20061
Upstream Blakeswere Widford29 Jun 200629 Jun 20061
Holly cross rd/water place farm22 Jun 200622 Jun 20061
Blakesware estate enhancement upstream3 Mar 20037 Jun 20052
Blakesware estate enhancement downstream4 Mar 20037 Jun 20052
u/s Ford Waterplace Farm19 Nov 200319 Nov 20031
Blakesware Estate13 Oct 200313 Oct 20031

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

2003–2025

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 2,303 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
11.4 cm
Median
19.7 cm
Upper quarter
25.3 cm
Largest
56.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ash

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

Bullhead Minnow 3-spined stickleback Stone loach Brook lamprey Roach

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 →