Roach · Rutilus rutilus

Roach in the Bourne

Largest measured roach: 29 cm

The largest roach measured in Environment Agency surveys of the Bourne was 29 cm, recorded at Pierce Mill on 7 August 2023.

Across 414 measured roach, the median measured length was 12.1 cm.

Surveyors recorded weights for 38 roach. The median was 2.4 oz (0.068 kg) and the largest recorded weight was 10.3 oz (0.292 kg).

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

See roach records across England →

Most recent observation7 August 2023Pierce Mill · 180 fish

Largest measured roach: 29 cm
Median length: 12.1 cm
Fish measured: 414
Survey locations: 1

Individual EA measurements

Largest measured roach

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
29 cm	7 Aug 2023	Pierce Mill	163080
26.6 cm	7 Aug 2023	Pierce Mill	163080
26.2 cm	7 Aug 2023	Pierce Mill	163080
25.5 cm	7 Aug 2023	Pierce Mill	163080
25.5 cm	19 Aug 2010	Pierce Mill	123504
25.3 cm	7 Aug 2023	Pierce Mill	163080
25.1 cm	8 Aug 2002	Pierce Mill	66861
24.3 cm	7 Aug 2023	Pierce Mill	163080
23.8 cm	19 Aug 2010	Pierce Mill	123504
23.7 cm	19 Aug 2010	Pierce Mill	123504

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 surveyed	First recorded	Last recorded	Visits finding roach
Pierce Mill	8 Aug 2002	7 Aug 2023	6

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

2002–2023

Survey records by year

Each bar shows how many survey visits recorded roach that year.

102

003

104

005

006

007

008

009

110

111

012

013

014

015

016

117

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 414 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 7.2 cm
Median: 12.1 cm
Upper quarter: 15.5 cm
Largest: 29 cm

0–99 mm

166

100–199 mm

219

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 38 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.4 oz (0.012 kg)
Lower quarter: 1.8 oz (0.0505 kg)
Median: 2.4 oz (0.068 kg)
Upper quarter: 4.2 oz (0.1185 kg)
Heaviest: 10.3 oz (0.292 kg)

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

More fish in this river

Explore the Bourne

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

Brown / sea trout Chub Minnow Stone loach 3-spined stickleback 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 →