Skip to content
Horse profile

Sierra Sue (IRE)

3yo filly · Trainer James Horton · Owner Mrs Paul Shanahan
by Starman (GB) out of Aurora Spring (IRE) (Power)
6 runs · 5 courses · from Apr 2026
As at 5 Nov 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
First-time headgear LTO Last run 4 Jul 2026 · 10th of 11 Last raced off OR 66
KTB Profile

Sierra Sue is a maiden who has run six times without a win or place. Her best effort came when fourth of nine at Goodwood in Jun 2026. The filly was held when finishing 10th of 11 in a Class 5 handicap at Leicester in Jul 2026 on her first-time headgear start, racing off an official rating of 66. She is by Starman out of an Aurora Spring mare.

Based on 6 archived runs · run-style from 6 commented runs since Apr 2026 · updated 5 Nov 2026
KTB at a glance Typically prominent

KTB Speed and Rating

KTB Speed

Best recent Speed 75 the best of the last 3 graded (A or B) runs · Leicester, 4 Jul 2026

How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →

Flat 6 figures · best 91A · median 73.5
GoingRunsBestMedianSince 5 Nov 2025
Good to Firm279A772 runs · 79 / 77
Good1——1 run · —
Soft1——1 run · —
Standard (AW)1——1 run · —
Good to Soft1——1 run · —
DistanceRunsBestMedianSince 5 Nov 2025
6f – 7f479A73.54 runs · 79 / 73.5
Under 6f1——1 run · —
1m – 1m1f1——1 run · —

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 6 figures from 6 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 73A the best of the last 3 rated runs · Redcar, 19 Jun 2026 Official rating 66 at the last run, 4 Jul 2026

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code — its best recent day. The KTB Rating on a racecard is a different reading of the same figures: the level the horse has been running to, an average of up to its last six runs with the latest counting most, so the two can differ. A, B or C on a run is how much known form was in that race. What this means →

Flat 6 figures · best 73A · median 62
GoingRunsBestMedianSince 5 Nov 2025
Good to Firm272A582 runs · 72 / 58
Good1——1 run · —
Soft1——1 run · —
Standard (AW)1——1 run · —
Good to Soft1——1 run · —
DistanceRunsBestMedianSince 5 Nov 2025
6f – 7f472A58.54 runs · 72 / 58.5
Under 6f1——1 run · —
1m – 1m1f1——1 run · —

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 6 figures from 6 runs · as at 4 Oct 2026 · a record, not a forecast

Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.

Run style from 6 analysed runs since Apr 2026

  • Prominent 4 (67%) · 0 wins
  • Held up 1 (17%) · 0 wins
  • Led 1 (17%) · 0 wins

Pedigree intelligence

Sire

Progeny in our archive have won 11.9% of 1,159 runs since Mar 2025 (188 horses).

Weakest over 1m – 1m1f (all codes): 8.8% from 171.

GoingRunsWinsSRvs sireThis horse
Firm100%−11.9—
Good to Firm2082210.6%−1.30 from 2
Good3363811.3%−0.60 from 1
Good to Soft8889.1%−2.80 from 1
Soft1491711.4%−0.50 from 1
Heavy29310.3%−1.6—
Standard (AW)3485014.4%+2.50 from 1
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f2083014.4%+2.50 from 1
6f – 7f7509012%+0.10 from 4
1m – 1m1f171158.8%−3.10 from 1
1m2f – 1m4f28310.7%−1.2—
1m5f – 2m200%−11.9—

Flat and jumps together (all codes) · since Mar 2025 · as at 5 Nov 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Aurora Spring (IRE) (Power)

2 siblings in the archive, 2 winners — best of them Roman Spring (IRE) (6 wins).

The wins came over 5f–7f; the highest grade won is Class 5 (Only In Jakarta (IRE)).

ProduceRunsWinsWin tripsBest grade
Roman Spring (IRE)5565f–6fClass 6
Only In Jakarta (IRE)1117fClass 5

Record by conditions

GoingRunsWinsSR£1
Good to Firm 2 0 0% −2.00
Good 1 0 0% −1.00
Soft 1 0 0% −1.00
Standard (AW) 1 0 0% −1.00
Good to Soft 1 0 0% −1.00

ClassRunsWinsSR£1
Class 5 5 0 0% −5.00
Class 4 1 0 0% −1.00

CourseRunsWinsSR£1
Leicester 2 0 0% −2.00
Redcar 1 0 0% −1.00
Goodwood 1 0 0% −1.00
Kempton (AW) 1 0 0% −1.00
Beverley 1 0 0% −1.00

DistanceRunsWinsSR£1
6f – 7f 4 0 0% −4.00
Under 6f 1 0 0% −1.00
1m – 1m1f 1 0 0% −1.00

JockeyRunsWinsSR£1
Jack Mitchell 2 0 0% −2.00
P J McDonald 2 0 0% −2.00
Daniel Muscutt 1 0 0% −1.00
Sean D Bowen 1 0 0% −1.00

HeadgearRunsWinsSR£1
None 5 0 0% −5.00
Cheekpieces 1 0 0% −1.00

Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.

Form

DateCourseRace PosBtn Wgt ORSpdKTB Jockey SP
2026 · 6 runs
04 Jul 26+15d Leicester Curve Theatre Fillies' Handicap Class 5 · 6f · Good To Firm · 11 ran Held up close to the pace early - urged into effort with 2f left - dropped away quickly inside final furlong - finished well held in 10th 10/11 1¾ 9-6 6675A44A Daniel Muscutt 40/1
19 Jun 26+7d Redcar Come Racing On Ladies' Day Tomorrow Maiden Handicap Class 5 · 5f · Good · 9 ran Held up towards the back - shifted right and made progress 2f out - edged left under pressure inside final furlong but couldn't threaten leaders 5/9 ¾ 9-9 6944B73A Sean D Bowen 33/1
12 Jun 26+18d Goodwood Fitzdares Fillies' Handicap Class 5 · 6f · Soft · 9 ran Settled in behind early - improved into contention 2f out and briefly up to second - edged out again inside the final furlong - faded to finish fourth 4/9 3¼ 9-8 6957B63A Jack Mitchell 10/1
25 May 26+19d Leicester Picnic At The Races Day Restricted Maiden Fillies' Stakes (GBB Race) Class 5 · 6f · Good To Firm · 10 ran Went straight to front - pressed for effort with 1f left then overtaken inside final furlong - held on for fifth 5/10 nk 9-2 —79A72A Jack Mitchell 13/2
06 May 26+21d Kempton (AW) Unibet More Extra Place Races Restricted Maiden Fillies' Stakes (GBB Race) Class 5 · 7f · Standard To Slow · 14 ran Sat close to the pace early - pressed for effort with 2f left - unable to land a blow late - finished ninth 9/14 ½ 9-2 —72B54A P J McDonald 18/1
15 Apr 26 Beverley Easter Maiden Fillies' Stakes (GBB Race) Class 4 · 1m½f · Good To Soft · 9 ran Sluggish start - tracked the pack through midfield - asked for effort over 2f out - flattened out inside final furlong 4/9 3½ 9-1 —91A61A P J McDonald 12/1

Quick answers

How many races has Sierra Sue won?
Sierra Sue (IRE) has yet to win, from 6 archived starts in 2026.
Who trains Sierra Sue?
Sierra Sue (IRE) is trained by James Horton, who saddled the horse on its most recent run on 4 July 2026.
Who is Sierra Sue's sire?
Sierra Sue (IRE) is by Starman (GB) out of Aurora Spring (IRE), whose sire is Power.
What is Sierra Sue's official rating?
The most recent official rating on record is 66, from the run on 4 July 2026. The highest on record is 69.
What is Sierra Sue's sire's record?
Starman (GB)'s progeny in our archive have won 11.9% of 1,159 runs since Mar 2025 (188 horses), Flat and jumps together. Weakest over 1m – 1m1f (all codes): 8.8% from 171.
Who are Sierra Sue's siblings?
Out of Aurora Spring (IRE), Sierra Sue (IRE) has 2 other produce in our archive, 2 of them winners. Most wins: Roman Spring (IRE) (6). Highest grade won: Class 5 (Only In Jakarta (IRE)). The wins came over 5f–7f. As at Nov 2026.

Record shown from April 2026. Our archive holds racing in Great Britain, Ireland and France from January 2005. Any runs before that, or in other countries, are not in it. In-running comments are available from 2024 onward.