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BOSTON MARATHON 2025

Shuang Cao

Bib: 21547•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:28/mi
26:18
↑ 97↓ 3451.5%
10K· 6.21 mi
8:35/mi
52:59
↑ 79↓ 1380.4%
15K· 9.32 mi
9:08/mi
1:21:22
↑ 67↓ 78
20K· 12.43 mi
9:24/mi
1:50:33
↑ 106↓ 860.1%
Half· 13.11 mi
9:24/mi
1:56:58
↑ 19↓ 370.5%
25K· 15.53 mi
9:23/mi
2:19:43
↑ 66↓ 880.2%
30K· 18.64 mi
9:45/mi
2:50:00
↑ 181↓ 1480.2%
20M
9:44/mi
3:03:14
↑ 64↓ 500.2%
21M
10:52/mi
3:14:06
↑ 106↓ 241.6%
35K· 21.75 mi
9:15/mi
3:21:01
↑ 17↓ 861.7%
23M
9:37/mi
3:33:03
↑ 23↓ 630.6%
24M
9:26/mi
3:42:29
↓ 821.3%
40K· 24.85 mi
9:19/mi
3:50:27
↓ 200.3%
25.2M
10:52/mi
3:54:12
↑ 13↓ 160.2%
Finish· 26.22 mi
9:33/mi
4:03:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:58
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:06:58
Pace9:41 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5926:188:2826:18
8:28
-
10K
6.21 mi11:47:4052:598:3226:41
8:35
+0:07
15K
9.32 mi12:16:031:21:228:4428:23
9:08
+0:33
20K
12.43 mi12:45:141:50:338:5429:11
9:24
+0:16
Half
13.11 mi12:51:391:56:588:556:25
9:24
0:00
25K
15.53 mi13:14:242:19:439:0022:45
9:23
-0:01
30K
18.64 mi13:44:412:50:009:0730:17
9:45
+0:22
20M
20.00 mi13:57:553:03:149:1013:14
9:44
-0:01
21M
21.00 mi14:08:473:14:069:1510:52
10:52
+1:08
35K
21.75 mi14:15:423:21:019:156:55
9:15
-1:37
23M
23.00 mi14:27:443:33:039:1612:02
9:37
+0:22
24M
24.00 mi14:37:103:42:299:169:26
9:26
-0:11
40K
24.85 mi14:45:083:50:279:167:58
9:19
-0:07
25.2M
25.20 mi14:48:533:54:129:183:45
10:52
+1:33
Finish
26.22 mi14:58:374:03:569:199:44
9:33
-1:19

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

8:28 /mi

Average Pace

9:19 /mi

Slowest Pace

10:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

52:59

22% of race

Time at Steady Pace

2:12:49

54% of race

Time at Slower Pace

58:08

24% of race

Average Pace: 9:18 /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 mi11:20:5926:188:2826:18
8:28
#19701
10K
6.21 mi11:47:4052:598:3226:41
8:35
#19999
15K
9.32 mi12:16:031:21:228:4428:23
9:08
#20908
20K
12.43 mi12:45:141:50:338:5429:11
9:24
#21428
Half
13.11 mi12:51:391:56:588:556:25
9:24
#21568
25K
15.53 mi13:14:242:19:439:0022:45
9:23
#21525
30K
18.64 mi13:44:412:50:009:0730:17
9:45
#21407
20M
20.00 mi13:57:553:03:149:1013:14
9:44
#21297
21M
21.00 mi14:08:473:14:069:1510:52
10:52
#21299
35K
21.75 mi14:15:423:21:019:156:55
9:15
#21216
23M
23.00 mi14:27:443:33:039:1612:02
9:37
#21075
24M
24.00 mi14:37:103:42:299:169:26
9:26
#21003
40K
24.85 mi14:45:083:50:279:167:58
9:19
#20901
25.2M
25.20 mi14:48:533:54:129:183:45
10:52
#20878
Finish
26.22 mi14:58:374:03:569:199:44
9:33
#20878
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi197017331733122612(Top 80%)8898(Top 73%)8898(Top 683%)
10K6.21 mi3.10 mi19999-2987470-1397470-13920312(Top 72%)7645(Top 63%)7645(Top 587%)
15K9.32 mi3.11 mi20908-9097996-5267996-52622612(Top 80%)8898(Top 73%)8898(Top 683%)
20K12.43 mi3.11 mi21428-5208279-2838279-28322562(Top 79%)8895(Top 73%)8895(Top 683%)
Half13.11 mi0.68 mi21568-1408359-808359-8023280(Top 82%)9297(Top 76%)9297(Top 714%)
25K15.53 mi2.42 mi21525+438337+228337+2221486(Top 76%)8349(Top 68%)8349(Top 641%)
30K18.64 mi3.11 mi21407+1188305+328305+3220835(Top 73%)8139(Top 67%)8139(Top 625%)
20M20.00 mi1.36 mi21297+1108269+368269+3620082(Top 71%)7839(Top 64%)7839(Top 602%)
21M21.00 mi1.00 mi21299-28284-158284-1521051(Top 74%)8472(Top 69%)8472(Top 650%)
35K21.75 mi0.75 mi21216+838254+308254+3019390(Top 68%)7665(Top 63%)7665(Top 588%)
23M23.00 mi1.25 mi21075+1418202+528202+5219140(Top 67%)7584(Top 62%)7584(Top 582%)
24M24.00 mi1.00 mi21003+728188+148188+1419400(Top 68%)7774(Top 64%)7774(Top 597%)
40K24.85 mi0.85 mi20901+1028145+438145+4317969(Top 63%)7123(Top 58%)7123(Top 547%)
25.2M25.20 mi0.35 mi20878+238142+38142+320290(Top 71%)8310(Top 68%)8310(Top 638%)
Finish26.22 mi1.02 mi208788158-168158-1621373(Top 75%)8844(Top 72%)8844(Top 679%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22612

Females

8898

F50-54

8898

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20312

Females

7645

F50-54

7645

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22612

Females

8898

F50-54

8898

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22562

Females

8895

F50-54

8895

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23280

Females

9297

F50-54

9297

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21486

Females

8349

F50-54

8349

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20835

Females

8139

F50-54

8139

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20082

Females

7839

F50-54

7839

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

21051

Females

8472

F50-54

8472

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19390

Females

7665

F50-54

7665

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

19140

Females

7584

F50-54

7584

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

19400

Females

7774

F50-54

7774

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17969

Females

7123

F50-54

7123

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20290

Females

8310

F50-54

8310

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21373

Females

8844

F50-54

8844

Passing Analysis

Category:
Athletes Passed
1479
Passed By
2656
Net Change
-1177
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19701
5K → 10K153451-298#19701#19999
10K → 15K42951-909#19999#20908
15K → 20K92612-520#20908#21428
20K → Half6146-140#21428#21568
Half → 25K165122+43#21568#21525
25K → 30K246128+118#21525#21407
30K → 20M14737+110#21407#21297
20M → 21M8284-2#21297#21299
21M → 35K9310+83#21299#21216
35K → 23M16726+141#21216#21075
23M → 24M9927+72#21075#21003
24M → 40K11311+102#21003#20901
40K → 25.2M3512+23#20901#20878
25.2M → Finish39390#20878#20878
TOTALS14792656-1177
📊

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