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BOSTON MARATHON 2025

Shan Xu

Bib: 24026•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 46%
Masters (Masters Women)
#0 / 6759
Top 33%
Division (F55-59)
#0 / 994
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:26
Rank: #21665
Start → 5K
8:50/mi
27:26 split
10K· 6.21 mi
52:57
Rank: #19966 (+1699)
5K → 10K
8:13/mi
25:31 split
15K· 9.32 mi
1:18:04
Rank: #18890 (+1076)
10K → 15K
8:05/mi
25:07 split
20K· 12.43 mi
1:43:32
Rank: #18197 (+693)
15K → 20K
8:12/mi
25:28 split
Half· 13.11 mi
1:48:56
Rank: #18037 (+160)
20K → Half
7:55/mi
5:24 split
25K· 15.53 mi
2:08:54
Rank: #17581 (+456)
Half → 25K
8:14/mi
19:58 split
30K· 18.64 mi
2:35:29
Rank: #17090 (+491)
25K → 30K
8:33/mi
26:35 split
20M
2:47:17
Rank: #16915 (+175)
30K → 20M
8:41/mi
11:48 split
21M
2:56:28
Rank: #16731 (+184)
20M → 21M
9:11/mi
9:11 split
35K· 21.75 mi
3:02:44
Rank: #16631 (+100)
21M → 35K
8:23/mi
6:16 split
23M
3:13:38
Rank: #16458 (+173)
35K → 23M
8:42/mi
10:54 split
24M
3:22:07
Rank: #16350 (+108)
23M → 24M
8:29/mi
8:29 split
40K· 24.85 mi
3:29:31
Rank: #16268 (+82)
24M → 40K
8:39/mi
7:24 split
25.2M
3:32:50
Rank: #16254 (+14)
40K → 25.2M
9:37/mi
3:19 split
Finish· 26.22 mi
3:41:30
Rank: #16252 (+2)
25.2M → Finish
8:30/mi
8:40 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:56
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:52:34
Pace8:35 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:0127:268:5027:26
8:50
-
10K
6.21 mi11:52:3252:578:3125:31
8:13
-0:37
15K
9.32 mi12:17:391:18:048:2325:07
8:05
-0:08
20K
12.43 mi12:43:071:43:328:2025:28
8:12
+0:07
Half
13.11 mi12:48:311:48:568:195:24
7:55
-0:17
25K
15.53 mi13:08:292:08:548:1819:58
8:14
+0:19
30K
18.64 mi13:35:042:35:298:2026:35
8:33
+0:19
20M
20.00 mi13:46:522:47:178:2211:48
8:41
+0:08
21M
21.00 mi13:56:032:56:288:249:11
9:11
+0:30
35K
21.75 mi14:02:193:02:448:246:16
8:23
-0:48
23M
23.00 mi14:13:133:13:388:2510:54
8:42
+0:19
24M
24.00 mi14:21:423:22:078:258:29
8:29
-0:13
40K
24.85 mi14:29:063:29:318:267:24
8:39
+0:10
25.2M
25.20 mi14:32:253:32:508:273:19
9:37
+0:58
Finish
26.22 mi14:41:053:41:308:278:40
8:30
-1:07

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

7:55 /mi

Average Pace

8:27 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:28

46% of race

Time at Steady Pace

1:20:06

36% of race

Time at Slower Pace

39:56

18% of race

Average Pace: 8:27 /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 mi11:27:0127:268:5027:26
8:50
#21665
10K
6.21 mi11:52:3252:578:3125:31
8:13
#19966
15K
9.32 mi12:17:391:18:048:2325:07
8:05
#18890
20K
12.43 mi12:43:071:43:328:2025:28
8:12
#18197
Half
13.11 mi12:48:311:48:568:195:24
7:55
#18037
25K
15.53 mi13:08:292:08:548:1819:58
8:14
#17581
30K
18.64 mi13:35:042:35:298:2026:35
8:33
#17090
20M
20.00 mi13:46:522:47:178:2211:48
8:41
#16915
21M
21.00 mi13:56:032:56:288:249:11
9:11
#16731
35K
21.75 mi14:02:193:02:448:246:16
8:23
#16631
23M
23.00 mi14:13:133:13:388:2510:54
8:42
#16458
24M
24.00 mi14:21:423:22:078:258:29
8:29
#16350
40K
24.85 mi14:29:063:29:318:267:24
8:39
#16268
25.2M
25.20 mi14:32:253:32:508:273:19
9:37
#16254
Finish
26.22 mi14:41:053:41:308:278:40
8:30
#16252
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi216658440844016647(Top 59%)5527(Top 45%)5527(Top 556%)
10K6.21 mi3.10 mi19966+16997449+9917449+99117982(Top 63%)6276(Top 51%)6276(Top 631%)
15K9.32 mi3.11 mi18890+10766845+6046845+60416647(Top 59%)5527(Top 45%)5527(Top 556%)
20K12.43 mi3.11 mi18197+6936456+3896456+38916299(Top 57%)5386(Top 44%)5386(Top 542%)
Half13.11 mi0.68 mi18037+1606362+946362+9415303(Top 54%)4800(Top 39%)4800(Top 483%)
25K15.53 mi2.42 mi17581+4566108+2546108+25415549(Top 55%)5057(Top 41%)5057(Top 509%)
30K18.64 mi3.11 mi17090+4915873+2355873+23515139(Top 53%)4982(Top 41%)4982(Top 501%)
20M20.00 mi1.36 mi16915+1755789+845789+8414980(Top 53%)5039(Top 41%)5039(Top 507%)
21M21.00 mi1.00 mi16731+1845717+725717+7214572(Top 51%)4938(Top 40%)4938(Top 497%)
35K21.75 mi0.75 mi16631+1005680+375680+3714763(Top 52%)5112(Top 42%)5112(Top 514%)
23M23.00 mi1.25 mi16458+1735605+755605+7514615(Top 51%)5135(Top 42%)5135(Top 517%)
24M24.00 mi1.00 mi16350+1085574+315574+3114429(Top 51%)5056(Top 41%)5056(Top 509%)
40K24.85 mi0.85 mi16268+825554+205554+2014403(Top 51%)5195(Top 42%)5195(Top 523%)
25.2M25.20 mi0.35 mi16254+145557-35557-315231(Top 54%)5672(Top 46%)5672(Top 571%)
Finish26.22 mi1.02 mi16252+25572-155572-1516264(Top 57%)6168(Top 50%)6168(Top 621%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

16647

Females

5527

F55-59

5527

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17982

Females

6276

F55-59

6276

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

16647

Females

5527

F55-59

5527

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16299

Females

5386

F55-59

5386

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

15303

Females

4800

F55-59

4800

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

15549

Females

5057

F55-59

5057

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

15139

Females

4982

F55-59

4982

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14980

Females

5039

F55-59

5039

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

14572

Females

4938

F55-59

4938

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14763

Females

5112

F55-59

5112

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14615

Females

5135

F55-59

5135

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

14429

Females

5056

F55-59

5056

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14403

Females

5195

F55-59

5195

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15231

Females

5672

F55-59

5672

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

16264

Females

6168

F55-59

6168

Passing Analysis

Category:
Athletes Passed
5710
Passed By
297
Net Change
+5413
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21665
5K → 10K171213+1699#21665#19966
10K → 15K10793+1076#19966#18890
15K → 20K7029+693#18890#18197
20K → Half1611+160#18197#18037
Half → 25K4626+456#18037#17581
25K → 30K51625+491#17581#17090
30K → 20M19419+175#17090#16915
20M → 21M20319+184#16915#16731
21M → 35K11717+100#16731#16631
35K → 23M19825+173#16631#16458
23M → 24M14032+108#16458#16350
24M → 40K11129+82#16350#16268
40K → 25.2M3824+14#16268#16254
25.2M → Finish7775+2#16254#16252
TOTALS5710297+5413
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing