RiverFish

Roach · Rutilus rutilus

Roach in the Boulters Weir Stream

Largest measured roach: 12.9 cm

The largest roach measured in Environment Agency surveys of the Boulters Weir Stream was 12.9 cm, recorded at Boulters Weir Downstream Fry on 21 August 2007.

Across 1,325 measured roach, the median measured length was 4.1 cm.

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

See roach records across England →

Most recent observation30 August 2023Boulters Weir Upstream Fry · 1 fish
Largest measured roach
12.9 cm
Median length
4.1 cm
Fish measured
1,325
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
12.9 cm21 Aug 2007Boulters Weir Downstream Fry108594
12 cm26 Aug 2003Boulters Weir Upstream Fry116939
11.9 cm21 Aug 2007Boulters Weir Downstream Fry108594
11.5 cm31 Aug 2006Boulters Weir Downstream Fry111832
11.4 cm26 Aug 2003Boulters Weir Upstream Fry116939
11.3 cm21 Aug 2007Boulters Weir Downstream Fry108594
11 cm31 Aug 2006Boulters Weir Downstream Fry111832
10.7 cm21 Aug 2007Boulters Weir Downstream Fry108594
10.6 cm21 Aug 2007Boulters Weir Downstream Fry108594
10.6 cm26 Aug 2003Boulters Weir Upstream Fry116939

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
Boulters Weir Upstream Fry26 Aug 200330 Aug 202312
Boulters Weir Downstream Fry26 Aug 200318 Aug 201511

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

2003–2023

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 1,325 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
3.6 cm
Median
4.1 cm
Upper quarter
4.6 cm
Largest
12.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Boulters Weir Stream

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

Minnow Dace Bleak Chub Gudgeon Bullhead

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 →