RiverFish

Roach · Rutilus rutilus

Roach in the River Eton College

Largest measured roach: 20.6 cm

The largest roach measured in Environment Agency surveys of the River Eton College was 20.6 cm, recorded at Eton Downstream Fry on 20 August 2008.

Across 3,128 measured roach, the median measured length was 4.2 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 Eton College.

See roach records across England →

Most recent observation4 September 2025Eton Upstream Fry · 74 fish
Largest measured roach
20.6 cm
Median length
4.2 cm
Fish measured
3,128
Survey locations
2

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
20.6 cm20 Aug 2008Eton Downstream Fry125700
20 cm20 Aug 2008Eton Downstream Fry125700
18.5 cm20 Aug 2008Eton Downstream Fry125700
18.1 cm21 Aug 2007Eton Upstream Fry108614
17.8 cm20 Aug 2008Eton Downstream Fry125700
17.6 cm20 Aug 2008Eton Downstream Fry125700
17.5 cm20 Aug 2008Eton Downstream Fry125700
17.1 cm20 Aug 2008Eton Downstream Fry125700
17 cm21 Aug 2007Eton Downstream Fry108613
16.7 cm21 Aug 2007Eton Downstream Fry108613

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Eton Upstream Fry28 Aug 20034 Sept 202519
Eton Downstream Fry24 Aug 20034 Sept 202519

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 roach that year.

Fish measured by surveyors

Measured length distribution

See how the 3,128 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
3.4 cm
Median
4.2 cm
Upper quarter
5.3 cm
Largest
20.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Eton College

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

Minnow Gudgeon Dace Chub Bleak 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 →