Boston Marathon logo
BOSTON MARATHON 2023

Lei Fang

Bib: 10338•F

AB

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 34%
Gender (Female)
#0 / 11423
Top 15%
Masters (Masters Women)
#0 / 6539
Top 6%
Division (F50-54)
#0 / 1207
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:23
Rank: #7543
Start → 5K
22:23 | 7:12/mi
10K· 6.21 mi
44:35
Rank: #7604 (-61)
5K → 10K
22:12 | 7:09/mi
15K· 9.32 mi
1:07:11
Rank: #7808 (-204)
10K → 15K
22:36 | 7:16/mi
20K· 12.43 mi
1:30:35
Rank: #8176 (-368)
15K → 20K
23:24 | 7:32/mi
Half· 13.11 mi
1:35:46
Rank: #8299 (-123)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:54:14
Rank: #8468 (-169)
Half → 25K
18:28 | 7:37/mi
30K· 18.64 mi
2:18:57
Rank: #8787 (-319)
25K → 30K
24:43 | 7:57/mi
20M
2:29:45
Rank: #8855 (-68)
30K → 20M
10:48 | 7:57/mi
21M
2:38:19
Rank: #8952 (-97)
20M → 21M
8:34 | 8:34/mi
35K· 21.75 mi
2:44:03
Rank: #8969 (-17)
21M → 35K
5:44 | 7:40/mi
23M
2:54:09
Rank: #9013 (-44)
35K → 23M
10:06 | 8:04/mi
24M
3:01:55
Rank: #9026 (-13)
23M → 24M
7:46 | 7:46/mi
40K· 24.85 mi
3:08:45
Rank: #9035 (-9)
24M → 40K
6:50 | 8:00/mi
25.2M
3:11:45
Rank: #9047 (-12)
40K → 25.2M
3:00 | 8:42/mi
Finish· 26.22 mi
3:19:27
Rank: #9036 (+11)
25.2M → Finish
7:42 | 7:33/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
Time1:35:46
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:43:41
Pace7:55 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0122:237:1222:23
7:12
-
10K
6.21 mi11:11:1344:357:1022:12
7:09
-0:03
15K
9.32 mi11:33:491:07:117:1222:36
7:16
+0:07
20K
12.43 mi11:57:131:30:357:1723:24
7:32
+0:16
Half
13.11 mi12:02:241:35:467:185:11
7:36
+0:04
25K
15.53 mi12:20:521:54:147:2118:28
7:37
+0:01
30K
18.64 mi12:45:352:18:577:2724:43
7:57
+0:20
20M
20.00 mi12:56:232:29:457:2910:48
7:57
0:00
21M
21.00 mi13:04:572:38:197:328:34
8:34
+0:37
35K
21.75 mi13:10:412:44:037:335:44
7:40
-0:54
23M
23.00 mi13:20:472:54:097:3410:06
8:04
+0:24
24M
24.00 mi13:28:333:01:557:357:46
7:46
-0:18
40K
24.85 mi13:35:233:08:457:366:50
8:00
+0:14
25.2M
25.20 mi13:38:233:11:457:373:00
8:42
+0:42
Finish
26.22 mi13:46:053:19:277:377:42
7:33
-1:09

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

7:09 /mi

Average Pace

7:37 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:11

34% of race

Time at Steady Pace

1:08:15

34% of race

Time at Slower Pace

1:04:01

32% of race

Average Pace: 7:36 /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 mi10:49:0122:237:1222:23
7:12
#7543
10K
6.21 mi11:11:1344:357:1022:12
7:09
#7604
15K
9.32 mi11:33:491:07:117:1222:36
7:16
#7808
20K
12.43 mi11:57:131:30:357:1723:24
7:32
#8176
Half
13.11 mi12:02:241:35:467:185:11
7:36
#8299
25K
15.53 mi12:20:521:54:147:2118:28
7:37
#8468
30K
18.64 mi12:45:352:18:577:2724:43
7:57
#8787
20M
20.00 mi12:56:232:29:457:2910:48
7:57
#8855
21M
21.00 mi13:04:572:38:197:328:34
8:34
#8952
35K
21.75 mi13:10:412:44:037:335:44
7:40
#8969
23M
23.00 mi13:20:472:54:097:3410:06
8:04
#9013
24M
24.00 mi13:28:333:01:557:357:46
7:46
#9026
40K
24.85 mi13:35:233:08:457:366:50
8:00
#9035
25.2M
25.20 mi13:38:233:11:457:373:00
8:42
#9047
Finish
26.22 mi13:46:053:19:277:377:42
7:33
#9036
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi75438568568370(Top 31%)1208(Top 11%)1208(Top 100%)
10K6.21 mi3.10 mi7604-61885-29885-297747(Top 29%)971(Top 9%)971(Top 80%)
15K9.32 mi3.11 mi7808-204969-84969-848370(Top 31%)1208(Top 11%)1208(Top 100%)
20K12.43 mi3.11 mi8176-3681110-1411110-1419579(Top 36%)1724(Top 15%)1724(Top 143%)
Half13.11 mi0.68 mi8299-1231157-471157-4711009(Top 41%)2351(Top 21%)2351(Top 195%)
25K15.53 mi2.42 mi8468-1691247-901247-909677(Top 36%)1856(Top 16%)1856(Top 154%)
30K18.64 mi3.11 mi8787-3191399-1521399-15210542(Top 40%)2406(Top 21%)2406(Top 199%)
20M20.00 mi1.36 mi8855-681449-501449-509902(Top 37%)2182(Top 19%)2182(Top 181%)
21M21.00 mi1.00 mi8952-971509-601509-6010878(Top 41%)2794(Top 24%)2794(Top 231%)
35K21.75 mi0.75 mi8969-171528-191528-199723(Top 37%)2227(Top 19%)2227(Top 185%)
23M23.00 mi1.25 mi9013-441572-441572-4410240(Top 38%)2611(Top 23%)2611(Top 216%)
24M24.00 mi1.00 mi9026-131606-341606-349539(Top 36%)2349(Top 21%)2349(Top 195%)
40K24.85 mi0.85 mi9035-91621-151621-1510008(Top 38%)2645(Top 23%)2645(Top 219%)
25.2M25.20 mi0.35 mi9047-121638-171638-1710772(Top 40%)3046(Top 27%)3046(Top 252%)
Finish26.22 mi1.02 mi9036+111662-241662-248976(Top 34%)2227(Top 19%)2227(Top 185%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8370

Females

1208

F50-54

1208

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7747

Females

971

F50-54

971

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8370

Females

1208

F50-54

1208

15K→20K

9.3 - 12.4 mi

Top 36%
×5stories
+106ft-86ft

Overall

9579

Females

1724

F50-54

1724

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

11009

Females

2351

F50-54

2351

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9677

Females

1856

F50-54

1856

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

10542

Females

2406

F50-54

2406

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

9902

Females

2182

F50-54

2182

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10878

Females

2794

F50-54

2794

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

9723

Females

2227

F50-54

2227

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10240

Females

2611

F50-54

2611

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9539

Females

2349

F50-54

2349

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10008

Females

2645

F50-54

2645

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10772

Females

3046

F50-54

3046

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

8976

Females

2227

F50-54

2227

Passing Analysis

Category:
Athletes Passed
858
Passed By
2351
Net Change
-1493
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7543
5K → 10K195256-61#7543#7604
10K → 15K68272-204#7604#7808
15K → 20K43411-368#7808#8176
20K → Half2125-123#8176#8299
Half → 25K63232-169#8299#8468
25K → 30K81400-319#8468#8787
30K → 20M61129-68#8787#8855
20M → 21M48145-97#8855#8952
21M → 35K3754-17#8952#8969
35K → 23M63107-44#8969#9013
23M → 24M6376-13#9013#9026
24M → 40K4453-9#9026#9035
40K → 25.2M2133-12#9035#9047
25.2M → Finish6958+11#9047#9036
TOTALS8582351-1493
📊

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