RiverFish

Roach · Rutilus rutilus

Roach in the River Mole

Largest measured roach: 37.5 cm

The largest roach measured in Environment Agency surveys of the River Mole was 37.5 cm, recorded at Norbury Park, Near Mickleham on 28 August 2002.

Across 10,442 measured roach, the median measured length was 10.5 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 Mole.

See roach records across England →

Most recent observation29 July 2025Castlefields · 93 fish
Largest measured roach
37.5 cm
Median length
10.5 cm
Fish measured
10,442
Survey locations
25

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
37.5 cm28 Aug 2002Norbury Park, Near Mickleham65041
31.9 cm30 May 1990Old Mole Channel103250
30.8 cm28 Aug 2002Norbury Park, Near Mickleham65041
30.2 cm30 May 1990Old Mole Channel103250
29.9 cm30 May 1990Old Mole Channel103250
29.4 cm17 Jul 1992Horley Swimming Baths103000
29.3 cm8 Sept 1992Downstream Gatwick103003
29.2 cm16 Feb 1993Norbury Park, Near Mickleham102992
29.1 cm30 May 1990Old Mole Channel103250
29 cm30 May 1990Old Mole Channel103250

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
Castlefields29 Jul 202529 Jul 20251
Norbury Park, Near Mickleham15 Oct 198517 Jul 20258
Downstream Gatwick8 Sept 19929 Jul 20259
Downstream Painshill23 Oct 20073 Jul 20258
Stoke D'Abernon25 Jun 202525 Jun 20251
Horley Swimming Baths17 Jul 199214 Nov 20176
Box Hill11 Feb 199320 Oct 201511
Meath Green Farm, Horley1 Oct 199230 Sept 201513
Randalls Road, Leatherhead7 Nov 200318 Sept 20133
Flanchford Farm5 Sept 200217 Sept 20135
Old Mole Channel20 Jun 198617 Oct 20128
Downstream Downside Mill25 Feb 199328 Sept 20104
Below Downside Bridge, Cobham.14 Nov 198519 Oct 20054
Povey Cross Enhancement Scheme20 Aug 200220 Aug 20021
South Weylands Farm7 May 19937 May 19931
Garsons Farm11 Mar 199311 Mar 19931
Norwood Farm Downstream Cobham9 Mar 19939 Mar 19931
St George's playing fields, Stoke D'Abernon23 Feb 199323 Feb 19931
Upstream Brockham Bridge4 Feb 19934 Feb 19931
Upstream Betchworth Weir15 Oct 199215 Oct 19921
Upstream Sidlow Bridge18 May 198918 May 19891
Upstream Horley STW19 Sept 198516 May 19892
Upstream M25 at Stoke D'Abernon (Left Arm)23 Oct 198623 Oct 19861
Downstream Brockham Bridge8 Oct 19858 Oct 19851
Burys Court School, Upstream Flanchford Bridge1 Oct 19851 Oct 19851

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

1985–2025

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 10,442 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
7.9 cm
Median
10.5 cm
Upper quarter
13.2 cm
Largest
37.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mole

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

Dace Chub Gudgeon Minnow Stone loach 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 →