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BOSTON MARATHON 2025

Margaret Cheng

Bib: 14398•F

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Division (F18-39)
#0 / 5469
Top 50%
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
7:32/mi
23:25
↑ 97↓ 3451.5%
10K· 6.21 mi
7:42/mi
47:19
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:11:35
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:35:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:43/mi
1:41:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:14/mi
2:01:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:14/mi
2:26:38
↑ 181↓ 1480.2%
20M
8:24/mi
2:38:03
↑ 64↓ 500.2%
21M
9:04/mi
2:47:07
↑ 106↓ 241.6%
35K· 21.75 mi
8:08/mi
2:53:12
↑ 17↓ 861.7%
23M
8:08/mi
3:03:23
↑ 23↓ 630.6%
24M
8:03/mi
3:11:26
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:18:25
↓ 200.3%
25.2M
8:51/mi
3:21:28
↑ 13↓ 160.2%
Finish· 26.22 mi
7:51/mi
3:29:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:07
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:48:21
Pace8:16 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:4223:257:3223:25
7:32
-
10K
6.21 mi11:18:3647:197:3723:54
7:42
+0:10
15K
9.32 mi11:42:521:11:357:4124:16
7:49
+0:07
20K
12.43 mi12:07:081:35:517:4324:16
7:49
0:00
Half
13.11 mi12:12:241:41:077:435:16
7:43
-0:06
25K
15.53 mi12:32:212:01:047:4819:57
8:14
+0:31
30K
18.64 mi12:57:552:26:387:5225:34
8:14
0:00
20M
20.00 mi13:09:202:38:037:5411:25
8:24
+0:10
21M
21.00 mi13:18:242:47:077:579:04
9:04
+0:40
35K
21.75 mi13:24:292:53:127:586:05
8:08
-0:56
23M
23.00 mi13:34:403:03:237:5810:11
8:08
0:00
24M
24.00 mi13:42:433:11:267:598:03
8:03
-0:05
40K
24.85 mi13:49:423:18:257:596:59
8:10
+0:07
25.2M
25.20 mi13:52:453:21:288:003:03
8:51
+0:41
Finish
26.22 mi14:00:453:29:288:008:00
7:51
-1:00

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

7:32 /mi

Average Pace

8:00 /mi

Slowest Pace

9:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:07

52% of race

Time at Steady Pace

1:16:49

37% of race

Time at Slower Pace

23:32

11% of race

Average Pace: 7:59 /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 mi10:54:4223:257:3223:25
7:32
#12551
10K
6.21 mi11:18:3647:197:3723:54
7:42
#13161
15K
9.32 mi11:42:521:11:357:4124:16
7:49
#13573
20K
12.43 mi12:07:081:35:517:4324:16
7:49
#13473
Half
13.11 mi12:12:241:41:077:435:16
7:43
#13473
25K
15.53 mi12:32:212:01:047:4819:57
8:14
#13847
30K
18.64 mi12:57:552:26:387:5225:34
8:14
#13607
20M
20.00 mi13:09:202:38:037:5411:25
8:24
#13536
21M
21.00 mi13:18:242:47:077:579:04
9:04
#13534
35K
21.75 mi13:24:292:53:127:586:05
8:08
#13512
23M
23.00 mi13:34:403:03:237:5810:11
8:08
#13307
24M
24.00 mi13:42:433:11:267:598:03
8:03
#13217
40K
24.85 mi13:49:423:18:257:596:59
8:10
#13132
25.2M
25.20 mi13:52:453:21:288:003:03
8:51
#13092
Finish
26.22 mi14:00:453:29:288:008:00
7:51
#13067
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi125513098309814438(Top 51%)4280(Top 35%)4280(Top 78%)
10K6.21 mi3.10 mi13161-6103441-3433441-34313803(Top 49%)3846(Top 31%)3846(Top 70%)
15K9.32 mi3.11 mi13573-4123731-2903731-29014438(Top 51%)4280(Top 35%)4280(Top 78%)
20K12.43 mi3.11 mi13473+1003710+213710+2113333(Top 47%)3733(Top 31%)3733(Top 68%)
Half13.11 mi0.68 mi134733717-73717-713464(Top 47%)3774(Top 31%)3774(Top 69%)
25K15.53 mi2.42 mi13847-3743959-2423959-24215505(Top 55%)5031(Top 41%)5031(Top 92%)
30K18.64 mi3.11 mi13607+2403887+723887+7213011(Top 46%)3833(Top 31%)3833(Top 70%)
20M20.00 mi1.36 mi13536+713870+173870+1713124(Top 46%)4057(Top 33%)4057(Top 74%)
21M21.00 mi1.00 mi13534+23909-393909-3913862(Top 49%)4566(Top 37%)4566(Top 83%)
35K21.75 mi0.75 mi13512+223919-103919-1013218(Top 47%)4302(Top 35%)4302(Top 79%)
23M23.00 mi1.25 mi13307+2053845+743845+7410910(Top 38%)3197(Top 26%)3197(Top 58%)
24M24.00 mi1.00 mi13217+903822+233822+2311555(Top 41%)3607(Top 29%)3607(Top 66%)
40K24.85 mi0.85 mi13132+853804+183804+1811312(Top 40%)3579(Top 29%)3579(Top 65%)
25.2M25.20 mi0.35 mi13092+403793+113793+1110800(Top 38%)3416(Top 28%)3416(Top 62%)
Finish26.22 mi1.02 mi13067+253799-63799-611759(Top 41%)3829(Top 31%)3829(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14438

Females

4280

F18-39

4280

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

13803

Females

3846

F18-39

3846

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14438

Females

4280

F18-39

4280

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13333

Females

3733

F18-39

3733

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

13464

Females

3774

F18-39

3774

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

15505

Females

5031

F18-39

5031

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

13011

Females

3833

F18-39

3833

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

13124

Females

4057

F18-39

4057

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13862

Females

4566

F18-39

4566

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13218

Females

4302

F18-39

4302

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10910

Females

3197

F18-39

3197

23M→24M

23.0 - 24.0 mi

Top 41%
×6story building
+12ft-82ft

Overall

11555

Females

3607

F18-39

3607

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11312

Females

3579

F18-39

3579

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10800

Females

3416

F18-39

3416

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11759

Females

3829

F18-39

3829

Passing Analysis

Category:
Athletes Passed
1810
Passed By
2326
Net Change
-516
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12551
5K → 10K98708-610#12551#13161
10K → 15K98510-412#13161#13573
15K → 20K228128+100#13573#13473
20K → Half39390#13473#13473
Half → 25K90464-374#13473#13847
25K → 30K346106+240#13847#13607
30K → 20M15786+71#13607#13536
20M → 21M111109+2#13536#13534
21M → 35K6240+22#13534#13512
35K → 23M22318+205#13512#13307
23M → 24M12030+90#13307#13217
24M → 40K11732+85#13217#13132
40K → 25.2M499+40#13132#13092
25.2M → Finish7247+25#13092#13067
TOTALS18102326-516
📊

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