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BOSTON MARATHON 2025

Ni Sun

Bib: 28782•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
11:34/mi
35:57
↑ 97↓ 3451.5%
10K· 6.21 mi
11:46/mi
1:12:30
↑ 79↓ 1380.4%
15K· 9.32 mi
11:44/mi
1:48:56
↑ 67↓ 78
20K· 12.43 mi
12:06/mi
2:26:33
↑ 106↓ 860.1%
Half· 13.11 mi
11:41/mi
2:34:31
↑ 19↓ 370.5%
25K· 15.53 mi
12:16/mi
3:04:16
↑ 66↓ 880.2%
30K· 18.64 mi
12:57/mi
3:44:31
↑ 181↓ 1480.2%
20M
12:18/mi
4:01:14
↑ 64↓ 500.2%
21M
13:15/mi
4:14:29
↑ 106↓ 241.6%
35K· 21.75 mi
11:07/mi
4:22:48
↑ 17↓ 861.7%
23M
11:52/mi
4:37:39
↑ 23↓ 630.6%
24M
11:34/mi
4:49:13
↓ 821.3%
40K· 24.85 mi
12:57/mi
5:00:17
↓ 200.3%
25.2M
15:05/mi
5:05:29
↑ 13↓ 160.2%
Finish· 26.22 mi
11:26/mi
5:17:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:34:31
Pace11:47 /mi
2nd Half
Distance13.11 mi
Time2:42:37
Pace12:24 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0135:5711:3435:57
11:34
-
10K
6.21 mi12:28:341:12:3011:4036:33
11:46
+0:12
15K
9.32 mi13:05:001:48:5611:4136:26
11:44
-0:02
20K
12.43 mi13:42:372:26:3311:4837:37
12:06
+0:22
Half
13.11 mi13:50:352:34:3111:477:58
11:41
-0:25
25K
15.53 mi14:20:203:04:1611:5229:45
12:16
+0:35
30K
18.64 mi15:00:353:44:3112:0340:15
12:57
+0:41
20M
20.00 mi15:17:184:01:1412:0416:43
12:18
-0:39
21M
21.00 mi15:30:334:14:2912:0713:15
13:15
+0:57
35K
21.75 mi15:38:524:22:4812:058:19
11:07
-2:08
23M
23.00 mi15:53:434:37:3912:0414:51
11:52
+0:45
24M
24.00 mi16:05:174:49:1312:0311:34
11:34
-0:18
40K
24.85 mi16:16:215:00:1712:0511:04
12:57
+1:23
25.2M
25.20 mi16:21:335:05:2912:075:12
15:05
+2:08
Finish
26.22 mi16:33:125:17:0812:0611:39
11:26
-3:39

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

11:07 /mi

Average Pace

12:06 /mi

Slowest Pace

15:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

8:19

3% of race

Time at Steady Pace

3:59:03

75% of race

Time at Slower Pace

1:09:46

22% of race

Average Pace: 12:06 /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 mi11:52:0135:5711:3435:57
11:34
#28065
10K
6.21 mi12:28:341:12:3011:4036:33
11:46
#27929
15K
9.32 mi13:05:001:48:5611:4136:26
11:44
#27789
20K
12.43 mi13:42:372:26:3311:4837:37
12:06
#27667
Half
13.11 mi13:50:352:34:3111:477:58
11:41
#27637
25K
15.53 mi14:20:203:04:1611:5229:45
12:16
#27484
30K
18.64 mi15:00:353:44:3112:0340:15
12:57
#27326
20M
20.00 mi15:17:184:01:1412:0416:43
12:18
#27245
21M
21.00 mi15:30:334:14:2912:0713:15
13:15
#27172
35K
21.75 mi15:38:524:22:4812:058:19
11:07
#27113
23M
23.00 mi15:53:434:37:3912:0414:51
11:52
#27036
24M
24.00 mi16:05:174:49:1312:0311:34
11:34
#26990
40K
24.85 mi16:16:215:00:1712:0511:04
12:57
#26961
25.2M
25.20 mi16:21:335:05:2912:075:12
15:05
#26969
Finish
26.22 mi16:33:125:17:0812:0611:39
11:26
#26941
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi28065120001200027426(Top 97%)11640(Top 95%)11640(Top 642%)
10K6.21 mi3.10 mi27929+13611912+8811912+8827812(Top 98%)11846(Top 97%)11846(Top 653%)
15K9.32 mi3.11 mi27789+14011837+7511837+7527426(Top 97%)11640(Top 95%)11640(Top 642%)
20K12.43 mi3.11 mi27667+12211774+6311774+6327209(Top 96%)11524(Top 94%)11524(Top 636%)
Half13.11 mi0.68 mi27637+3011758+1611758+1627200(Top 96%)11527(Top 94%)11527(Top 636%)
25K15.53 mi2.42 mi27484+15311675+8311675+8326709(Top 94%)11254(Top 92%)11254(Top 621%)
30K18.64 mi3.11 mi27326+15811601+7411601+7426624(Top 94%)11293(Top 92%)11293(Top 623%)
20M20.00 mi1.36 mi27245+8111553+4811553+4825665(Top 90%)10829(Top 89%)10829(Top 597%)
21M21.00 mi1.00 mi27172+7311512+4111512+4125360(Top 89%)10741(Top 88%)10741(Top 592%)
35K21.75 mi0.75 mi27113+5911486+2611486+2624434(Top 86%)10299(Top 84%)10299(Top 568%)
23M23.00 mi1.25 mi27036+7711448+3811448+3824870(Top 88%)10531(Top 86%)10531(Top 581%)
24M24.00 mi1.00 mi26990+4611427+2111427+2124984(Top 88%)10625(Top 87%)10625(Top 586%)
40K24.85 mi0.85 mi26961+2911419+811419+826225(Top 92%)11254(Top 92%)11254(Top 621%)
25.2M25.20 mi0.35 mi26969-811425-611425-627161(Top 96%)11731(Top 96%)11731(Top 647%)
Finish26.22 mi1.02 mi26941+2811416+911416+926020(Top 92%)11158(Top 91%)11158(Top 615%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

27426

Females

11640

F45-49

11640

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

27812

Females

11846

F45-49

11846

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

27426

Females

11640

F45-49

11640

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

27209

Females

11524

F45-49

11524

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

27200

Females

11527

F45-49

11527

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

26709

Females

11254

F45-49

11254

25K→30K

15.5 - 18.6 mi

Top 94%
×9story building
+181ft-148ft

Overall

26624

Females

11293

F45-49

11293

30K→20M

18.6 - 20.0 mi

Top 90%
×5story building
+64ft-50ft

Overall

25665

Females

10829

F45-49

10829

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

25360

Females

10741

F45-49

10741

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24434

Females

10299

F45-49

10299

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

24870

Females

10531

F45-49

10531

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

24984

Females

10625

F45-49

10625

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26225

Females

11254

F45-49

11254

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27161

Females

11731

F45-49

11731

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2story building
+22ft-21ft

Overall

26020

Females

11158

F45-49

11158

Passing Analysis

Category:
Athletes Passed
1244
Passed By
120
Net Change
+1124
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28065
5K → 10K16428+136#28065#27929
10K → 15K15111+140#27929#27789
15K → 20K14422+122#27789#27667
20K → Half366+30#27667#27637
Half → 25K1574+153#27637#27484
25K → 30K17517+158#27484#27326
30K → 20M821+81#27326#27245
20M → 21M752+73#27245#27172
21M → 35K601+59#27172#27113
35K → 23M781+77#27113#27036
23M → 24M493+46#27036#26990
24M → 40K334+29#26990#26961
40K → 25.2M513-8#26961#26969
25.2M → Finish357+28#26969#26941
TOTALS1244120+1124
📊

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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Questions or issues regarding timing data?

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing