Siobhan Williams

Bib: 28834 F GB

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 59786
Gender (Female)
#0 / 26115
Division (F18-39)
#0 / 14744
Race Day Weather
56°/46°F
overcast clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
12:20/mi
38:19
49125
10K· 6.21 mi
13:33/mi
1:20:24
5081
15K· 9.32 mi
14:41/mi
2:06:00
4451
20K· 12.43 mi
16:12/mi
2:56:19
6740
Half· 13.10 mi
15:33/mi
3:06:45
27
25K· 15.53 mi
16:40/mi
3:47:20
5063
30K· 18.64 mi
16:08/mi
4:37:26
6946
35K· 21.75 mi
16:01/mi
5:27:09
8788
40K· 24.85 mi
16:10/mi
6:17:21
5875
Finish· 26.22 mi
15:40/mi
6:38:43
1418
Course Elevation
503ft
Total climb
613ft
Total descent
166ft
Range
6 to 172 ft
×14story building

See every mile of your race

Add your watch's GPX to unlock per-mile pace, heart rate, and grade — mile by mile on this timeline.

Works with Garmin, Apple Watch, Strava, COROS, Suunto & more.

The Course

Half Splits

1st Half· via Half
3:06:4514:16 /mi⚡ faster
2nd Half
3:31:5816:10 /mi+13.5%
Positive split — 13.5% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
38:1912:203.11 mi38:19
12:20
-
10K
1:20:2412:573.10 mi42:05
13:33
+1:13
15K
2:06:0013:323.11 mi45:36
14:41
+1:08
20K
2:56:1914:123.11 mi50:19
16:12
+1:31
Half(13.10 mi)
3:06:4514:160.67 mi10:26
15:33
-0:39
25K
3:47:2014:392.43 mi40:35
16:40
+1:07
30K
4:37:2614:533.11 mi50:06
16:08
-0:32
35K
5:27:0915:033.11 mi49:43
16:01
-0:07
40K
6:17:2115:113.10 mi50:12
16:10
+0:09
Finish(26.22 mi)
6:38:4315:141.37 mi21:22
15:40
-0:30
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

12:20 /mi

Average Pace

15:13 /mi

Slowest Pace

16:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:06:00

32% of race

Time at Steady Pace

4:32:43

68% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 15:12 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi553262281722817570142409924099
10K3.10 mi56160-83423439-62223439-622565882377923779
15K3.11 mi56537-37723725-28623725-286570142409924099
20K3.11 mi57221-68424233-50824233-508581412493924939
Half(13.10 mi)0.67 mi57240-1924264-3124264-31568742422724227
25K2.43 mi57234+624263+124263+1568622413824138
30K3.11 mi57068+16624184+7924184+79555872347223472
35K3.11 mi56825+24324067+11724067+117538632271622716
40K3.10 mi56785+4024054+1324054+13556612377823778
Finish(26.22 mi)1.37 mi56766+1924058-424058-4558832391723917

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×10story building
+49ft-125ft

Overall

57014

Females

24099

F18-39

24099

5K→10K

3.1 - 6.2 mi

Top 95%
×4story building
+50ft-81ft

Overall

56588

Females

23779

F18-39

23779

10K→15K

6.2 - 9.3 mi

Top 95%
×1story
+44ft-51ft

Overall

57014

Females

24099

F18-39

24099

15K→20K

9.3 - 12.4 mi

Top 97%
×3story building
+67ft-40ft

Overall

58141

Females

24939

F18-39

24939

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+8ft-27ft

Overall

56874

Females

24227

F18-39

24227

Half→25K

13.1 - 15.5 mi

Top 95%
×2story building
+50ft-63ft

Overall

56862

Females

24138

F18-39

24138

25K→30K

15.5 - 18.6 mi

Top 93%
×2story building
+69ft-46ft

Overall

55587

Females

23472

F18-39

23472

30K→35K

18.6 - 21.8 mi

Top 90%
×2story building
+87ft-88ft

Overall

53863

Females

22716

F18-39

22716

35K→40K

21.8 - 24.9 mi

Top 93%
×3story building
+58ft-75ft

Overall

55661

Females

23778

F18-39

23778

40K→Finish

24.9 - 26.2 mi

Top 93%
×1story
+14ft-18ft

Overall

55883

Females

23917

F18-39

23917

Passing Analysis

Category:
Net Change
0
0 passed by0* passed
SegmentMovementRank
Start → 5K-#55326
5K10K
200200-834
#55326 #56160
10K15K
200183-377
#56160 #56537
15K20K
20089-684
#56537 #57221
20KHalf
6546-19
#57221 #57240
Half25K
194200+6
#57240 #57234
25K30K
99265+166
#57234 #57068
30K35K
55298*+243
#57068 #56825
35K40K
98138+40
#56825 #56785
40KFinish
4867+19
#56785 #56766
TOTALS
11591486*-1440
#55326 #56766

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Visualized

Category:
Loading...

Passing Circle

Loading...

Position Flow

Loading...

Race Lanes

Loading...

Is this your race? Claim it to upload your GPX and export your data as yours.

Upload your GPX file

Add per-mile pace & heart rate — works with Garmin, Apple Watch, Strava & more.

Download your race track as a GPX or TCX file for Strava, Garmin Connect, or other apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

London Marathon Events

London Marathon Events

Mika Timing

Mika Timing