RiverFish

Roach · Rutilus rutilus

Roach in the River Ouzel

Largest measured roach: 34.3 cm

The largest roach measured in Environment Agency surveys of the River Ouzel was 34.3 cm, recorded at Leighton Buzzard on 16 November 1990.

Across 8,238 measured roach, the median measured length was 10.8 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 Ouzel.

See roach records across England →

Most recent observation7 August 2025Newport Pagnell · 9 fish
Largest measured roach
34.3 cm
Median length
10.8 cm
Fish measured
8,238
Survey locations
15

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
34.3 cm16 Nov 1990Leighton Buzzard29042
34.3 cm16 Nov 1990Leighton Buzzard29042
33.8 cm16 Nov 1990Leighton Buzzard29042
32.3 cm12 Dec 1997Open University29061
32.3 cm3 Dec 1997Simpson Ouzel29060
32.3 cm16 Nov 1990Leighton Buzzard29042
32.3 cm16 Nov 1990Leighton Buzzard29042
31.8 cm16 Nov 1990Leighton Buzzard29042
31.8 cm27 Oct 1986Leighton Buzzard29038
31.8 cm27 Oct 1986Leighton Buzzard29038

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
Newport Pagnell7 Nov 19907 Aug 20257
Open University4 Jan 19955 Aug 202514
Manor Sports Field28 Oct 198631 Jul 202517
DS Caldecote Mill17 Jun 201315 Jul 20193
Leighton Buzzard27 Oct 19868 Jul 201916
US Open University3 Sept 20146 Oct 20174
US Leighton Buzzard21 Mar 201621 Mar 20161
M1 Road Bridge8 Nov 199013 May 20105
Caldecote Mill6 Nov 199012 May 201012
Castle Meadow22 Nov 199030 Apr 200911
US Billington12 Apr 200712 Apr 20071
Simpson Ouzel21 Nov 199029 Mar 20044
Stoke Hammond28 Oct 198624 Mar 20043
Billington27 Oct 198626 Nov 19974
Cotton Valley STW9 Nov 19909 Nov 19901

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

1986–2025

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 8,238 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
8.3 cm
Median
10.8 cm
Upper quarter
13.8 cm
Largest
34.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ouzel

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

Gudgeon Perch Dace Bullhead Minnow 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 →