Boston Marathon logo
BOSTON MARATHON 2023

Laura Guerin

Bib: 31485•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:16
Rank: #24442
Start → 5K
32:16 | 10:23/mi
10K· 6.21 mi
1:03:30
Rank: #24107 (+335)
5K → 10K
31:14 | 10:03/mi
15K· 9.32 mi
1:34:26
Rank: #23872 (+235)
10K → 15K
30:56 | 9:57/mi
20K· 12.43 mi
2:05:18
Rank: #23602 (+270)
15K → 20K
30:52 | 9:56/mi
Half· 13.11 mi
2:11:56
Rank: #23549 (+53)
20K → Half
6:38 | 9:43/mi
25K· 15.53 mi
2:38:22
Rank: #23595 (-46)
Half → 25K
26:26 | 10:54/mi
30K· 18.64 mi
3:13:09
Rank: #23545 (+50)
25K → 30K
34:47 | 11:12/mi
20M
3:27:29
Rank: #23430 (+115)
30K → 20M
14:20 | 10:33/mi
21M
3:38:22
Rank: #23289 (+141)
20M → 21M
10:53 | 10:53/mi
35K· 21.75 mi
3:45:34
Rank: #23196 (+93)
21M → 35K
7:12 | 9:37/mi
23M
3:58:06
Rank: #23029 (+167)
35K → 23M
12:32 | 10:01/mi
24M
4:07:41
Rank: #22889 (+140)
23M → 24M
9:35 | 9:35/mi
40K· 24.85 mi
4:16:01
Rank: #22789 (+100)
24M → 40K
8:20 | 9:45/mi
25.2M
4:19:31
Rank: #22733 (+56)
40K → 25.2M
3:30 | 10:09/mi
Finish· 26.22 mi
4:28:10
Rank: #22571 (+162)
25.2M → Finish
8:39 | 8:29/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
Time2:11:56
Pace10:04 /mi
2nd Half
Distance13.11 mi
Time2:16:14
Pace10:24 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:3832:1610:2332:16
10:23
-
10K
6.21 mi12:23:521:03:3010:1331:14
10:03
-0:20
15K
9.32 mi12:54:481:34:2610:0830:56
9:57
-0:06
20K
12.43 mi13:25:402:05:1810:0530:52
9:56
-0:01
Half
13.11 mi13:32:182:11:5610:046:38
9:43
-0:13
25K
15.53 mi13:58:442:38:2210:1226:26
10:54
+1:11
30K
18.64 mi14:33:313:13:0910:2234:47
11:12
+0:18
20M
20.00 mi14:47:513:27:2910:2214:20
10:33
-0:39
21M
21.00 mi14:58:443:38:2210:2410:53
10:53
+0:20
35K
21.75 mi15:05:563:45:3410:227:12
9:37
-1:16
23M
23.00 mi15:18:283:58:0610:2112:32
10:01
+0:24
24M
24.00 mi15:28:034:07:4110:199:35
9:35
-0:26
40K
24.85 mi15:36:234:16:0110:188:20
9:45
+0:10
25.2M
25.20 mi15:39:534:19:3110:183:30
10:09
+0:24
Finish
26.22 mi15:48:324:28:1010:148:39
8:29
-1:40

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

8:29 /mi

Average Pace

10:14 /mi

Slowest Pace

11:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:26

9% of race

Time at Steady Pace

2:04:02

46% of race

Time at Slower Pace

1:58:42

44% of race

Average Pace: 10:14 /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 mi11:52:3832:1610:2332:16
10:23
#24442
10K
6.21 mi12:23:521:03:3010:1331:14
10:03
#24107
15K
9.32 mi12:54:481:34:2610:0830:56
9:57
#23872
20K
12.43 mi13:25:402:05:1810:0530:52
9:56
#23602
Half
13.11 mi13:32:182:11:5610:046:38
9:43
#23549
25K
15.53 mi13:58:442:38:2210:1226:26
10:54
#23595
30K
18.64 mi14:33:313:13:0910:2234:47
11:12
#23545
20M
20.00 mi14:47:513:27:2910:2214:20
10:33
#23430
21M
21.00 mi14:58:443:38:2210:2410:53
10:53
#23289
35K
21.75 mi15:05:563:45:3410:227:12
9:37
#23196
23M
23.00 mi15:18:283:58:0610:2112:32
10:01
#23029
24M
24.00 mi15:28:034:07:4110:199:35
9:35
#22889
40K
24.85 mi15:36:234:16:0110:188:20
9:45
#22789
25.2M
25.20 mi15:39:534:19:3110:183:30
10:09
#22733
Finish
26.22 mi15:48:324:28:1010:148:39
8:29
#22571
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24442101221012223428(Top 88%)9565(Top 84%)9565(Top 196%)
10K6.21 mi3.10 mi24107+3359951+1719951+17123806(Top 89%)9786(Top 86%)9786(Top 200%)
15K9.32 mi3.11 mi23872+2359817+1349817+13423428(Top 88%)9565(Top 84%)9565(Top 196%)
20K12.43 mi3.11 mi23602+2709665+1529665+15222743(Top 85%)9214(Top 81%)9214(Top 189%)
Half13.11 mi0.68 mi23549+539634+319634+3122723(Top 85%)9199(Top 81%)9199(Top 188%)
25K15.53 mi2.42 mi23595-469672-389672-3823815(Top 89%)9856(Top 86%)9856(Top 202%)
30K18.64 mi3.11 mi23545+509670+29670+223409(Top 88%)9684(Top 85%)9684(Top 198%)
20M20.00 mi1.36 mi23430+1159622+489622+4821852(Top 82%)8898(Top 78%)8898(Top 182%)
21M21.00 mi1.00 mi23289+1419548+749548+7420576(Top 77%)8232(Top 72%)8232(Top 169%)
35K21.75 mi0.75 mi23196+939515+339515+3320261(Top 76%)8099(Top 71%)8099(Top 166%)
23M23.00 mi1.25 mi23029+1679442+739442+7320038(Top 75%)7983(Top 70%)7983(Top 163%)
24M24.00 mi1.00 mi22889+1409377+659377+6519529(Top 73%)7739(Top 68%)7739(Top 158%)
40K24.85 mi0.85 mi22789+1009329+489329+4819229(Top 72%)7628(Top 67%)7628(Top 156%)
25.2M25.20 mi0.35 mi22733+569301+289301+2818024(Top 68%)6995(Top 61%)6995(Top 143%)
Finish26.22 mi1.02 mi22571+1629228+739228+7315404(Top 58%)5497(Top 48%)5497(Top 113%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21stories
+97ft-345ft

Overall

23428

Females

9565

F18-39

9565

5K→10K

3.1 - 6.2 mi

Top 89%
×5stories
+79ft-138ft

Overall

23806

Females

9786

F18-39

9786

10K→15K

6.2 - 9.3 mi

Top 88%
×3stories
+67ft-78ft

Overall

23428

Females

9565

F18-39

9565

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

22743

Females

9214

F18-39

9214

20K→Half

12.4 - 13.1 mi

Top 85%
×2stories
+19ft-37ft

Overall

22723

Females

9199

F18-39

9199

Half→25K

13.1 - 15.5 mi

Top 89%
×4stories
+66ft-88ft

Overall

23815

Females

9856

F18-39

9856

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

23409

Females

9684

F18-39

9684

30K→20M

18.6 - 20.0 mi

Top 82%
×5stories
+64ft-50ft

Overall

21852

Females

8898

F18-39

8898

20M→21M

20.0 - 21.0 mi

Top 77%
×8stories
+106ft-24ft

Overall

20576

Females

8232

F18-39

8232

21M→35K

21.0 - 21.8 mi

Top 76%
×7stories
+17ft-86ft

Overall

20261

Females

8099

F18-39

8099

35K→23M

21.8 - 23.0 mi

Top 75%
×5stories
+23ft-63ft

Overall

20038

Females

7983

F18-39

7983

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19529

Females

7739

F18-39

7739

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

19229

Females

7628

F18-39

7628

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18024

Females

6995

F18-39

6995

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2stories
+22ft-21ft

Overall

15404

Females

5497

F18-39

5497

Passing Analysis

Category:
Athletes Passed
2207
Passed By
336
Net Change
+1871
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24442
5K → 10K39661+335#24442#24107
10K → 15K27136+235#24107#23872
15K → 20K28919+270#23872#23602
20K → Half618+53#23602#23549
Half → 25K72118-46#23549#23595
25K → 30K12171+50#23595#23545
30K → 20M1216+115#23545#23430
20M → 21M1454+141#23430#23289
21M → 35K952+93#23289#23196
35K → 23M1670+167#23196#23029
23M → 24M1411+140#23029#22889
24M → 40K1088+100#22889#22789
40K → 25.2M571+56#22789#22733
25.2M → Finish1631+162#22733#22571
TOTALS2207336+1871
📊

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