Boston Marathon logo
BOSTON MARATHON 2023

Elizabeth Irwin

Bib: 29587•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
34:32
Rank: #25831
Start → 5K
34:32 | 11:07/mi
10K· 6.21 mi
1:10:01
Rank: #25885 (-54)
5K → 10K
35:29 | 11:25/mi
15K· 9.32 mi
1:46:02
Rank: #25868 (+17)
10K → 15K
36:01 | 11:36/mi
20K· 12.43 mi
2:21:12
Rank: #25650 (+218)
15K → 20K
35:10 | 11:19/mi
Half· 13.11 mi
2:29:14
Rank: #25667 (-17)
20K → Half
8:02 | 11:46/mi
25K· 15.53 mi
3:03:51
Rank: #25886 (-219)
Half → 25K
34:37 | 14:17/mi
30K· 18.64 mi
3:49:30
Rank: #26023 (-137)
25K → 30K
45:39 | 14:42/mi
20M
4:08:36
Rank: #26018 (+5)
30K → 20M
19:06 | 14:03/mi
21M
4:22:45
Rank: #25988 (+30)
20M → 21M
14:09 | 14:09/mi
35K· 21.75 mi
4:32:58
Rank: #25991 (-3)
21M → 35K
10:13 | 13:39/mi
23M
4:52:10
Rank: #26034 (-43)
35K → 23M
19:12 | 15:20/mi
24M
5:07:03
Rank: #26083 (-49)
23M → 24M
14:53 | 14:53/mi
40K· 24.85 mi
5:20:19
Rank: #26111 (-28)
24M → 40K
13:16 | 15:31/mi
25.2M
5:26:00
Rank: #26118 (-7)
40K → 25.2M
5:41 | 16:29/mi
Finish· 26.22 mi
5:39:19
Rank: #26116 (+2)
25.2M → Finish
13:19 | 13:04/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
Time2:29:14
Pace11:23 /mi
2nd Half
Distance13.11 mi
Time3:10:05
Pace14:30 /mi
📊Positive Split: 27.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:4734:3211:0734:32
11:07
-
10K
6.21 mi12:30:161:10:0111:1635:29
11:25
+0:18
15K
9.32 mi13:06:171:46:0211:2336:01
11:36
+0:11
20K
12.43 mi13:41:272:21:1211:2235:10
11:19
-0:17
Half
13.11 mi13:49:292:29:1411:238:02
11:46
+0:27
25K
15.53 mi14:24:063:03:5111:5034:37
14:17
+2:31
30K
18.64 mi15:09:453:49:3012:1945:39
14:42
+0:25
20M
20.00 mi15:28:514:08:3612:2619:06
14:03
-0:39
21M
21.00 mi15:43:004:22:4512:3114:09
14:09
+0:06
35K
21.75 mi15:53:134:32:5812:3310:13
13:39
-0:30
23M
23.00 mi16:12:254:52:1012:4219:12
15:20
+1:41
24M
24.00 mi16:27:185:07:0312:4814:53
14:53
-0:27
40K
24.85 mi16:40:345:20:1912:5313:16
15:31
+0:38
25.2M
25.20 mi16:46:155:26:0012:565:41
16:29
+0:58
Finish
26.22 mi16:59:345:39:1912:5713:19
13:04
-3:25

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

11:07 /mi

Average Pace

12:57 /mi

Slowest Pace

16:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:33

48% of race

Time at Steady Pace

2:18:37

41% of race

Time at Slower Pace

38:09

11% of race

Average Pace: 12:56 /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 mi11:54:4734:3211:0734:32
11:07
#25831
10K
6.21 mi12:30:161:10:0111:1635:29
11:25
#25885
15K
9.32 mi13:06:171:46:0211:2336:01
11:36
#25868
20K
12.43 mi13:41:272:21:1211:2235:10
11:19
#25650
Half
13.11 mi13:49:292:29:1411:238:02
11:46
#25667
25K
15.53 mi14:24:063:03:5111:5034:37
14:17
#25886
30K
18.64 mi15:09:453:49:3012:1945:39
14:42
#26023
20M
20.00 mi15:28:514:08:3612:2619:06
14:03
#26018
21M
21.00 mi15:43:004:22:4512:3114:09
14:09
#25988
35K
21.75 mi15:53:134:32:5812:3310:13
13:39
#25991
23M
23.00 mi16:12:254:52:1012:4219:12
15:20
#26034
24M
24.00 mi16:27:185:07:0312:4814:53
14:53
#26083
40K
24.85 mi16:40:345:20:1912:5313:16
15:31
#26111
25.2M
25.20 mi16:46:155:26:0012:565:41
16:29
#26118
Finish
26.22 mi16:59:345:39:1912:5713:19
13:04
#26116
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25831109431094325791(Top 97%)10915(Top 96%)10915(Top 223%)
10K6.21 mi3.10 mi25885-5410971-2810971-2825901(Top 97%)10981(Top 96%)10981(Top 225%)
15K9.32 mi3.11 mi25868+1710958+1310958+1325791(Top 97%)10915(Top 96%)10915(Top 223%)
20K12.43 mi3.11 mi25650+21810838+12010838+12025032(Top 94%)10499(Top 92%)10499(Top 215%)
Half13.11 mi0.68 mi25667-1710852-1410852-1425716(Top 97%)10913(Top 96%)10913(Top 223%)
25K15.53 mi2.42 mi25886-21910980-12810980-12826429(Top 99%)11323(Top 99%)11323(Top 232%)
30K18.64 mi3.11 mi26023-13711067-8711067-8726327(Top 99%)11269(Top 99%)11269(Top 231%)
20M20.00 mi1.36 mi26018+511065+211065+225857(Top 97%)11047(Top 97%)11047(Top 226%)
21M21.00 mi1.00 mi25988+3011051+1411051+1425168(Top 95%)10699(Top 94%)10699(Top 219%)
35K21.75 mi0.75 mi25991-311056-511056-525998(Top 98%)11133(Top 97%)11133(Top 228%)
23M23.00 mi1.25 mi26034-4311085-2911085-2926367(Top 99%)11314(Top 99%)11314(Top 232%)
24M24.00 mi1.00 mi26083-4911120-3511120-3526362(Top 99%)11320(Top 99%)11320(Top 232%)
40K24.85 mi0.85 mi26111-2811140-2011140-2026314(Top 99%)11309(Top 99%)11309(Top 232%)
25.2M25.20 mi0.35 mi26118-711144-411144-426261(Top 99%)11282(Top 99%)11282(Top 231%)
Finish26.22 mi1.02 mi26116+211145-111145-126007(Top 98%)11176(Top 98%)11176(Top 229%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21stories
+97ft-345ft

Overall

25791

Females

10915

F18-39

10915

5K→10K

3.1 - 6.2 mi

Top 97%
×5stories
+79ft-138ft

Overall

25901

Females

10981

F18-39

10981

10K→15K

6.2 - 9.3 mi

Top 97%
×3stories
+67ft-78ft

Overall

25791

Females

10915

F18-39

10915

15K→20K

9.3 - 12.4 mi

Top 94%
×5stories
+106ft-86ft

Overall

25032

Females

10499

F18-39

10499

20K→Half

12.4 - 13.1 mi

Top 97%
×2stories
+19ft-37ft

Overall

25716

Females

10913

F18-39

10913

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26429

Females

11323

F18-39

11323

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

26327

Females

11269

F18-39

11269

30K→20M

18.6 - 20.0 mi

Top 97%
×5stories
+64ft-50ft

Overall

25857

Females

11047

F18-39

11047

20M→21M

20.0 - 21.0 mi

Top 95%
×8stories
+106ft-24ft

Overall

25168

Females

10699

F18-39

10699

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

25998

Females

11133

F18-39

11133

35K→23M

21.8 - 23.0 mi

Top 99%
×5stories
+23ft-63ft

Overall

26367

Females

11314

F18-39

11314

23M→24M

23.0 - 24.0 mi

Top 99%
×6stories
+12ft-82ft

Overall

26362

Females

11320

F18-39

11320

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

26314

Females

11309

F18-39

11309

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

26261

Females

11282

F18-39

11282

25.2M→Finish

25.2 - 26.2 mi

Top 98%
×2stories
+22ft-21ft

Overall

26007

Females

11176

F18-39

11176

Passing Analysis

Category:
Athletes Passed
527
Passed By
812
Net Change
-285
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25831
5K → 10K87141-54#25831#25885
10K → 15K8467+17#25885#25868
15K → 20K2257+218#25868#25650
20K → Half1633-17#25650#25667
Half → 25K8227-219#25667#25886
25K → 30K16153-137#25886#26023
30K → 20M2116+5#26023#26018
20M → 21M344+30#26018#25988
21M → 35K1114-3#25988#25991
35K → 23M750-43#25991#26034
23M → 24M352-49#26034#26083
24M → 40K432-28#26083#26111
40K → 25.2M29-7#26111#26118
25.2M → Finish97+2#26118#26116
TOTALS527812-285
📊

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