Boston Marathon logo
BOSTON MARATHON 2023

Mei Xu

Bib: 17018•F

WA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 38%
Masters (Masters Women)
#0 / 6539
Top 25%
Division (F50-54)
#0 / 1207
Top 17%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:49
Rank: #16223
Start → 5K
25:49 | 8:19/mi
10K· 6.21 mi
51:30
Rank: #16421 (-198)
5K → 10K
25:41 | 8:16/mi
15K· 9.32 mi
1:16:54
Rank: #16189 (+232)
10K → 15K
25:24 | 8:11/mi
20K· 12.43 mi
1:42:25
Rank: #15860 (+329)
15K → 20K
25:31 | 8:13/mi
Half· 13.11 mi
1:47:54
Rank: #15789 (+71)
20K → Half
5:29 | 8:02/mi
25K· 15.53 mi
2:07:53
Rank: #15561 (+228)
Half → 25K
19:59 | 8:15/mi
30K· 18.64 mi
2:34:16
Rank: #15298 (+263)
25K → 30K
26:23 | 8:30/mi
20M
2:45:45
Rank: #15149 (+149)
30K → 20M
11:29 | 8:27/mi
21M
2:54:39
Rank: #14999 (+150)
20M → 21M
8:54 | 8:54/mi
35K· 21.75 mi
3:00:36
Rank: #14875 (+124)
21M → 35K
5:57 | 7:57/mi
23M
3:10:57
Rank: #14685 (+190)
35K → 23M
10:21 | 8:16/mi
24M
3:19:01
Rank: #14528 (+157)
23M → 24M
8:04 | 8:04/mi
40K· 24.85 mi
3:25:56
Rank: #14373 (+155)
24M → 40K
6:55 | 8:05/mi
25.2M
3:28:53
Rank: #14301 (+72)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:36:50
Rank: #14143 (+158)
25.2M → Finish
7:57 | 7:48/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⚖️ Balanced
Distance13.11 mi
Time1:47:54
Pace8:14 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:48:56
Pace8:19 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4425:498:1925:49
8:19
-
10K
6.21 mi11:50:2551:308:1725:41
8:16
-0:03
15K
9.32 mi12:15:491:16:548:1525:24
8:11
-0:05
20K
12.43 mi12:41:201:42:258:1425:31
8:13
+0:02
Half
13.11 mi12:46:491:47:548:145:29
8:02
-0:11
25K
15.53 mi13:06:482:07:538:1419:59
8:15
+0:13
30K
18.64 mi13:33:112:34:168:1726:23
8:30
+0:15
20M
20.00 mi13:44:402:45:458:1711:29
8:27
-0:03
21M
21.00 mi13:53:342:54:398:198:54
8:54
+0:27
35K
21.75 mi13:59:313:00:368:185:57
7:57
-0:57
23M
23.00 mi14:09:523:10:578:1810:21
8:16
+0:19
24M
24.00 mi14:17:563:19:018:188:04
8:04
-0:12
40K
24.85 mi14:24:513:25:568:176:55
8:05
+0:01
25.2M
25.20 mi14:27:483:28:538:172:57
8:33
+0:28
Finish
26.22 mi14:35:453:36:508:177:57
7:48
-0:45

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

7:48 /mi

Average Pace

8:17 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:27:56

96% of race

Time at Steady Pace

8:54

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /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 mi11:24:4425:498:1925:49
8:19
#16223
10K
6.21 mi11:50:2551:308:1725:41
8:16
#16421
15K
9.32 mi12:15:491:16:548:1525:24
8:11
#16189
20K
12.43 mi12:41:201:42:258:1425:31
8:13
#15860
Half
13.11 mi12:46:491:47:548:145:29
8:02
#15789
25K
15.53 mi13:06:482:07:538:1419:59
8:15
#15561
30K
18.64 mi13:33:112:34:168:1726:23
8:30
#15298
20M
20.00 mi13:44:402:45:458:1711:29
8:27
#15149
21M
21.00 mi13:53:342:54:398:198:54
8:54
#14999
35K
21.75 mi13:59:313:00:368:185:57
7:57
#14875
23M
23.00 mi14:09:523:10:578:1810:21
8:16
#14685
24M
24.00 mi14:17:563:19:018:188:04
8:04
#14528
40K
24.85 mi14:24:513:25:568:176:55
8:05
#14373
25.2M
25.20 mi14:27:483:28:538:172:57
8:33
#14301
Finish
26.22 mi14:35:453:36:508:177:57
7:48
#14143
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi162235419541915691(Top 59%)5103(Top 45%)5103(Top 423%)
10K6.21 mi3.10 mi16421-1985537-1185537-11816699(Top 63%)5689(Top 50%)5689(Top 471%)
15K9.32 mi3.11 mi16189+2325401+1365401+13615691(Top 59%)5103(Top 45%)5103(Top 423%)
20K12.43 mi3.11 mi15860+3295219+1825219+18215052(Top 57%)4746(Top 42%)4746(Top 393%)
Half13.11 mi0.68 mi15789+715176+435176+4314710(Top 55%)4506(Top 39%)4506(Top 373%)
25K15.53 mi2.42 mi15561+2285066+1105066+11014541(Top 55%)4543(Top 40%)4543(Top 376%)
30K18.64 mi3.11 mi15298+2634942+1244942+12414269(Top 54%)4493(Top 39%)4493(Top 372%)
20M20.00 mi1.36 mi15149+1494869+734869+7313356(Top 50%)4047(Top 35%)4047(Top 335%)
21M21.00 mi1.00 mi14999+1504793+764793+7612868(Top 48%)3876(Top 34%)3876(Top 321%)
35K21.75 mi0.75 mi14875+1244732+614732+6111847(Top 45%)3354(Top 29%)3354(Top 278%)
23M23.00 mi1.25 mi14685+1904641+914641+9111685(Top 44%)3359(Top 29%)3359(Top 278%)
24M24.00 mi1.00 mi14528+1574567+744567+7411745(Top 44%)3464(Top 30%)3464(Top 287%)
40K24.85 mi0.85 mi14373+1554498+694498+6910699(Top 40%)3003(Top 26%)3003(Top 249%)
25.2M25.20 mi0.35 mi14301+724465+334465+3310003(Top 38%)2719(Top 24%)2719(Top 225%)
Finish26.22 mi1.02 mi14143+1584386+794386+7910733(Top 40%)3065(Top 27%)3065(Top 254%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21stories
+97ft-345ft

Overall

15691

Females

5103

F50-54

5103

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16699

Females

5689

F50-54

5689

10K→15K

6.2 - 9.3 mi

Top 59%
×3stories
+67ft-78ft

Overall

15691

Females

5103

F50-54

5103

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

15052

Females

4746

F50-54

4746

20K→Half

12.4 - 13.1 mi

Top 55%
×2stories
+19ft-37ft

Overall

14710

Females

4506

F50-54

4506

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

14541

Females

4543

F50-54

4543

25K→30K

15.5 - 18.6 mi

Top 54%
×9stories
+181ft-148ft

Overall

14269

Females

4493

F50-54

4493

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

13356

Females

4047

F50-54

4047

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

12868

Females

3876

F50-54

3876

21M→35K

21.0 - 21.8 mi

Top 45%
×7stories
+17ft-86ft

Overall

11847

Females

3354

F50-54

3354

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

11685

Females

3359

F50-54

3359

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

11745

Females

3464

F50-54

3464

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10699

Females

3003

F50-54

3003

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10003

Females

2719

F50-54

2719

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

10733

Females

3065

F50-54

3065

Passing Analysis

Category:
Athletes Passed
2782
Passed By
702
Net Change
+2080
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16223
5K → 10K203401-198#16223#16421
10K → 15K32391+232#16421#16189
15K → 20K36839+329#16189#15860
20K → Half787+71#15860#15789
Half → 25K25931+228#15789#15561
25K → 30K31855+263#15561#15298
30K → 20M17324+149#15298#15149
20M → 21M16414+150#15149#14999
21M → 35K1273+124#14999#14875
35K → 23M20515+190#14875#14685
23M → 24M1647+157#14685#14528
24M → 40K1594+155#14528#14373
40K → 25.2M775+72#14373#14301
25.2M → Finish1646+158#14301#14143
TOTALS2782702+2080
📊

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