Boston Marathon logo
BOSTON MARATHON 2023

Claire Li

Bib: 16977•F

NJ

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Division (F18-39)
#0 / 4884
Top 44%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:26
Rank: #15363
Start → 5K
25:26 | 8:11/mi
10K· 6.21 mi
50:19
Rank: #15101 (+262)
5K → 10K
24:53 | 8:01/mi
15K· 9.32 mi
1:15:10
Rank: #14857 (+244)
10K → 15K
24:51 | 8:00/mi
20K· 12.43 mi
1:40:36
Rank: #14824 (+33)
15K → 20K
25:26 | 8:11/mi
Half· 13.11 mi
1:46:06
Rank: #14827 (-3)
20K → Half
5:30 | 8:04/mi
25K· 15.53 mi
2:05:41
Rank: #14589 (+238)
Half → 25K
19:35 | 8:05/mi
30K· 18.64 mi
2:30:43
Rank: #13981 (+608)
25K → 30K
25:02 | 8:03/mi
20M
2:41:51
Rank: #13776 (+205)
30K → 20M
11:08 | 8:12/mi
21M
2:49:51
Rank: #13354 (+422)
20M → 21M
8:00 | 8:00/mi
35K· 21.75 mi
2:55:24
Rank: #13133 (+221)
21M → 35K
5:33 | 7:25/mi
23M
3:05:04
Rank: #12813 (+320)
35K → 23M
9:40 | 7:43/mi
24M
3:12:33
Rank: #12558 (+255)
23M → 24M
7:29 | 7:29/mi
40K· 24.85 mi
3:18:57
Rank: #12308 (+250)
24M → 40K
6:24 | 7:29/mi
25.2M
3:21:38
Rank: #12187 (+121)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:28:35
Rank: #11813 (+374)
25.2M → Finish
6:57 | 6:49/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 Half
Distance13.11 mi
Time1:46:06
Pace8:06 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:42:29
Pace7:49 /mi
📊Negative Split: 3.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:2725:268:1125:26
8:11
-
10K
6.21 mi11:47:2050:198:0624:53
8:01
-0:10
15K
9.32 mi12:12:111:15:108:0424:51
8:00
-0:01
20K
12.43 mi12:37:371:40:368:0625:26
8:11
+0:11
Half
13.11 mi12:43:071:46:068:065:30
8:04
-0:07
25K
15.53 mi13:02:422:05:418:0519:35
8:05
+0:01
30K
18.64 mi13:27:442:30:438:0525:02
8:03
-0:02
20M
20.00 mi13:38:522:41:518:0611:08
8:12
+0:09
21M
21.00 mi13:46:522:49:518:058:00
8:00
-0:12
35K
21.75 mi13:52:252:55:248:045:33
7:25
-0:35
23M
23.00 mi14:02:053:05:048:039:40
7:43
+0:18
24M
24.00 mi14:09:343:12:338:017:29
7:29
-0:14
40K
24.85 mi14:15:583:18:578:006:24
7:29
0:00
25.2M
25.20 mi14:18:393:21:388:002:41
7:47
+0:18
Finish
26.22 mi14:25:363:28:357:586:57
6:49
-0:58

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

6:49 /mi

Average Pace

7:58 /mi

Slowest Pace

8:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

38:44

19% of race

Time at Steady Pace

2:38:43

76% of race

Time at Slower Pace

11:08

5% of race

Average Pace: 7:57 /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 mi11:22:2725:268:1125:26
8:11
#15363
10K
6.21 mi11:47:2050:198:0624:53
8:01
#15101
15K
9.32 mi12:12:111:15:108:0424:51
8:00
#14857
20K
12.43 mi12:37:371:40:368:0625:26
8:11
#14824
Half
13.11 mi12:43:071:46:068:065:30
8:04
#14827
25K
15.53 mi13:02:422:05:418:0519:35
8:05
#14589
30K
18.64 mi13:27:442:30:438:0525:02
8:03
#13981
20M
20.00 mi13:38:522:41:518:0611:08
8:12
#13776
21M
21.00 mi13:46:522:49:518:058:00
8:00
#13354
35K
21.75 mi13:52:252:55:248:045:33
7:25
#13133
23M
23.00 mi14:02:053:05:048:039:40
7:43
#12813
24M
24.00 mi14:09:343:12:338:017:29
7:29
#12558
40K
24.85 mi14:15:583:18:578:006:24
7:29
#12308
25.2M
25.20 mi14:18:393:21:388:002:41
7:47
#12187
Finish
26.22 mi14:25:363:28:357:586:57
6:49
#11813
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi153634873487314375(Top 54%)4306(Top 38%)4306(Top 88%)
10K6.21 mi3.10 mi15101+2624706+1674706+16714863(Top 56%)4580(Top 40%)4580(Top 94%)
15K9.32 mi3.11 mi14857+2444570+1364570+13614375(Top 54%)4306(Top 38%)4306(Top 88%)
20K12.43 mi3.11 mi14824+334568+24568+214883(Top 56%)4632(Top 41%)4632(Top 95%)
Half13.11 mi0.68 mi14827-34575-74575-714845(Top 56%)4565(Top 40%)4565(Top 93%)
25K15.53 mi2.42 mi14589+2384461+1144461+11413343(Top 50%)3827(Top 34%)3827(Top 78%)
30K18.64 mi3.11 mi13981+6084129+3324129+33211365(Top 43%)2829(Top 25%)2829(Top 58%)
20M20.00 mi1.36 mi13776+2054024+1054024+10511667(Top 44%)3097(Top 27%)3097(Top 63%)
21M21.00 mi1.00 mi13354+4223784+2403784+2407392(Top 28%)1288(Top 11%)1288(Top 26%)
35K21.75 mi0.75 mi13133+2213672+1123672+1128009(Top 30%)1516(Top 13%)1516(Top 31%)
23M23.00 mi1.25 mi12813+3203516+1563516+1567910(Top 30%)1557(Top 14%)1557(Top 32%)
24M24.00 mi1.00 mi12558+2553386+1303386+1307641(Top 29%)1546(Top 14%)1546(Top 32%)
40K24.85 mi0.85 mi12308+2503259+1273259+1276690(Top 25%)1256(Top 11%)1256(Top 26%)
25.2M25.20 mi0.35 mi12187+1213207+523207+525400(Top 20%)892(Top 8%)892(Top 18%)
Finish26.22 mi1.02 mi11813+3743019+1883019+1884235(Top 16%)521(Top 5%)521(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

14375

Females

4306

F18-39

4306

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

14863

Females

4580

F18-39

4580

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

14375

Females

4306

F18-39

4306

15K→20K

9.3 - 12.4 mi

Top 56%
×5stories
+106ft-86ft

Overall

14883

Females

4632

F18-39

4632

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

14845

Females

4565

F18-39

4565

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13343

Females

3827

F18-39

3827

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

11365

Females

2829

F18-39

2829

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11667

Females

3097

F18-39

3097

20M→21M

20.0 - 21.0 mi

Top 28%
×8stories
+106ft-24ft

Overall

7392

Females

1288

F18-39

1288

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8009

Females

1516

F18-39

1516

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

7910

Females

1557

F18-39

1557

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

7641

Females

1546

F18-39

1546

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

6690

Females

1256

F18-39

1256

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5400

Females

892

F18-39

892

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4235

Females

521

F18-39

521

Passing Analysis

Category:
Athletes Passed
4089
Passed By
539
Net Change
+3550
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15363
5K → 10K460198+262#15363#15101
10K → 15K32581+244#15101#14857
15K → 20K201168+33#14857#14824
20K → Half2831-3#14824#14827
Half → 25K27638+238#14827#14589
25K → 30K6157+608#14589#13981
30K → 20M21611+205#13981#13776
20M → 21M4220+422#13776#13354
21M → 35K2210+221#13354#13133
35K → 23M3211+320#13133#12813
23M → 24M2583+255#12813#12558
24M → 40K2511+250#12558#12308
40K → 25.2M1210+121#12308#12187
25.2M → Finish3740+374#12187#11813
TOTALS4089539+3550
📊

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