Boston Marathon logo
BOSTON MARATHON 2023

Gillian Croucher

Bib: 13010•F

AB

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 43%
Gender (Female)
#0 / 11423
Top 25%
Division (F18-39)
#0 / 4884
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:15
Rank: #12400
Start → 5K
24:15 | 7:48/mi
10K· 6.21 mi
48:45
Rank: #13154 (-754)
5K → 10K
24:30 | 7:53/mi
15K· 9.32 mi
1:12:57
Rank: #12944 (+210)
10K → 15K
24:12 | 7:47/mi
20K· 12.43 mi
1:37:16
Rank: #12637 (+307)
15K → 20K
24:19 | 7:50/mi
Half· 13.11 mi
1:42:33
Rank: #12600 (+37)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
2:01:40
Rank: #12469 (+131)
Half → 25K
19:07 | 7:53/mi
30K· 18.64 mi
2:26:31
Rank: #12122 (+347)
25K → 30K
24:51 | 8:00/mi
20M
2:37:30
Rank: #12008 (+114)
30K → 20M
10:59 | 8:05/mi
21M
2:46:13
Rank: #11991 (+17)
20M → 21M
8:43 | 8:43/mi
35K· 21.75 mi
2:52:08
Rank: #11961 (+30)
21M → 35K
5:55 | 7:55/mi
23M
3:02:31
Rank: #11935 (+26)
35K → 23M
10:23 | 8:18/mi
24M
3:10:26
Rank: #11874 (+61)
23M → 24M
7:55 | 7:55/mi
40K· 24.85 mi
3:17:10
Rank: #11748 (+126)
24M → 40K
6:44 | 7:53/mi
25.2M
3:20:06
Rank: #11706 (+42)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:27:44
Rank: #11527 (+179)
25.2M → Finish
7:38 | 7:29/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:33
Pace7:49 /mi
2nd Half
Distance13.11 mi
Time1:45:11
Pace8:01 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:5624:157:4824:15
7:48
-
10K
6.21 mi11:17:2648:457:5124:30
7:53
+0:05
15K
9.32 mi11:41:381:12:577:5024:12
7:47
-0:06
20K
12.43 mi12:05:571:37:167:5024:19
7:50
+0:03
Half
13.11 mi12:11:141:42:337:495:17
7:45
-0:05
25K
15.53 mi12:30:212:01:407:5019:07
7:53
+0:08
30K
18.64 mi12:55:122:26:317:5224:51
8:00
+0:07
20M
20.00 mi13:06:112:37:307:5210:59
8:05
+0:05
21M
21.00 mi13:14:542:46:137:558:43
8:43
+0:38
35K
21.75 mi13:20:492:52:087:555:55
7:55
-0:48
23M
23.00 mi13:31:123:02:317:5610:23
8:18
+0:23
24M
24.00 mi13:39:073:10:267:567:55
7:55
-0:23
40K
24.85 mi13:45:513:17:107:566:44
7:53
-0:02
25.2M
25.20 mi13:48:473:20:067:562:56
8:30
+0:37
Finish
26.22 mi13:56:253:27:447:567:38
7:29
-1:01

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:29 /mi

Average Pace

7:56 /mi

Slowest Pace

8:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:42

89% of race

Time at Steady Pace

22:02

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:55 /mi

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

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

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

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:52:5624:157:4824:15
7:48
#12400
10K
6.21 mi11:17:2648:457:5124:30
7:53
#13154
15K
9.32 mi11:41:381:12:577:5024:12
7:47
#12944
20K
12.43 mi12:05:571:37:167:5024:19
7:50
#12637
Half
13.11 mi12:11:141:42:337:495:17
7:45
#12600
25K
15.53 mi12:30:212:01:407:5019:07
7:53
#12469
30K
18.64 mi12:55:122:26:317:5224:51
8:00
#12122
20M
20.00 mi13:06:112:37:307:5210:59
8:05
#12008
21M
21.00 mi13:14:542:46:137:558:43
8:43
#11991
35K
21.75 mi13:20:492:52:087:555:55
7:55
#11961
23M
23.00 mi13:31:123:02:317:5610:23
8:18
#11935
24M
24.00 mi13:39:073:10:267:567:55
7:55
#11874
40K
24.85 mi13:45:513:17:107:566:44
7:53
#11748
25.2M
25.20 mi13:48:473:20:067:562:56
8:30
#11706
Finish
26.22 mi13:56:253:27:447:567:38
7:29
#11527
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi124003099309912653(Top 48%)3264(Top 29%)3264(Top 67%)
10K6.21 mi3.10 mi13154-7543538-4393538-43913866(Top 52%)3958(Top 35%)3958(Top 81%)
15K9.32 mi3.11 mi12944+2103426+1123426+11212653(Top 48%)3264(Top 29%)3264(Top 67%)
20K12.43 mi3.11 mi12637+3073278+1483278+14811974(Top 45%)2957(Top 26%)2957(Top 61%)
Half13.11 mi0.68 mi12600+373262+163262+1612276(Top 46%)3068(Top 27%)3068(Top 63%)
25K15.53 mi2.42 mi12469+1313211+513211+5111801(Top 44%)2954(Top 26%)2954(Top 60%)
30K18.64 mi3.11 mi12122+3473043+1683043+16810919(Top 41%)2596(Top 23%)2596(Top 53%)
20M20.00 mi1.36 mi12008+1143005+383005+3810913(Top 41%)2693(Top 24%)2693(Top 55%)
21M21.00 mi1.00 mi11991+173006-13006-111778(Top 44%)3284(Top 29%)3284(Top 67%)
35K21.75 mi0.75 mi11961+302999+72999+711490(Top 43%)3130(Top 27%)3130(Top 64%)
23M23.00 mi1.25 mi11935+263019-203019-2011853(Top 45%)3431(Top 30%)3431(Top 70%)
24M24.00 mi1.00 mi11874+612995+242995+2410681(Top 40%)2925(Top 26%)2925(Top 60%)
40K24.85 mi0.85 mi11748+1262946+492946+499217(Top 35%)2279(Top 20%)2279(Top 47%)
25.2M25.20 mi0.35 mi11706+422935+112935+119662(Top 36%)2545(Top 22%)2545(Top 52%)
Finish26.22 mi1.02 mi11527+1792868+672868+678523(Top 32%)2044(Top 18%)2044(Top 42%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21stories
+97ft-345ft

Overall

12653

Females

3264

F18-39

3264

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

13866

Females

3958

F18-39

3958

10K→15K

6.2 - 9.3 mi

Top 48%
×3stories
+67ft-78ft

Overall

12653

Females

3264

F18-39

3264

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

11974

Females

2957

F18-39

2957

20K→Half

12.4 - 13.1 mi

Top 46%
×2stories
+19ft-37ft

Overall

12276

Females

3068

F18-39

3068

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

11801

Females

2954

F18-39

2954

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

10919

Females

2596

F18-39

2596

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

10913

Females

2693

F18-39

2693

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11778

Females

3284

F18-39

3284

21M→35K

21.0 - 21.8 mi

Top 43%
×7stories
+17ft-86ft

Overall

11490

Females

3130

F18-39

3130

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

11853

Females

3431

F18-39

3431

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

10681

Females

2925

F18-39

2925

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9217

Females

2279

F18-39

2279

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9662

Females

2545

F18-39

2545

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2stories
+22ft-21ft

Overall

8523

Females

2044

F18-39

2044

Passing Analysis

Category:
Athletes Passed
2326
Passed By
1453
Net Change
+873
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12400
5K → 10K96850-754#12400#13154
10K → 15K322112+210#13154#12944
15K → 20K37467+307#12944#12637
20K → Half5215+37#12637#12600
Half → 25K19867+131#12600#12469
25K → 30K39346+347#12469#12122
30K → 20M16046+114#12122#12008
20M → 21M9174+17#12008#11991
21M → 35K6232+30#11991#11961
35K → 23M10074+26#11961#11935
23M → 24M9837+61#11935#11874
24M → 40K13610+126#11874#11748
40K → 25.2M5311+42#11748#11706
25.2M → Finish19112+179#11706#11527
TOTALS23261453+873
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness 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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing