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BOSTON MARATHON 2025

Susan Duncan

Bib: 9542•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 27%
Gender (Female)
#0 / 12228
Top 10%
Masters (Masters Women)
#0 / 6759
Top 3%
Division (F40-44)
#0 / 1718
Top 7%
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
6:56/mi
21:31
↑ 97↓ 3451.5%
10K· 6.21 mi
6:54/mi
42:56
↑ 79↓ 1380.4%
15K· 9.32 mi
6:52/mi
1:04:17
↑ 67↓ 78
20K· 12.43 mi
7:05/mi
1:26:16
↑ 106↓ 860.1%
Half· 13.11 mi
6:56/mi
1:31:00
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:48:25
↑ 66↓ 880.2%
30K· 18.64 mi
7:54/mi
2:12:58
↑ 181↓ 1480.2%
20M
7:40/mi
2:23:23
↑ 64↓ 500.2%
21M
8:25/mi
2:31:48
↑ 106↓ 241.6%
35K· 21.75 mi
7:14/mi
2:37:13
↑ 17↓ 861.7%
23M
7:46/mi
2:46:56
↑ 23↓ 630.6%
24M
7:39/mi
2:54:35
↓ 821.3%
40K· 24.85 mi
7:48/mi
3:01:15
↓ 200.3%
25.2M
8:33/mi
3:04:12
↑ 13↓ 160.2%
Finish· 26.22 mi
7:45/mi
3:12:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:00
Pace6:56 /mi
2nd Half
Distance13.11 mi
Time1:41:06
Pace7:43 /mi
📊Positive Split: 11.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:5821:316:5621:31
6:56
-
10K
6.21 mi11:08:2342:566:5521:25
6:54
-0:02
15K
9.32 mi11:29:441:04:176:5421:21
6:52
-0:02
20K
12.43 mi11:51:431:26:166:5621:59
7:05
+0:13
Half
13.11 mi11:56:271:31:006:564:44
6:56
-0:09
25K
15.53 mi12:13:521:48:256:5917:25
7:11
+0:15
30K
18.64 mi12:38:252:12:587:0824:33
7:54
+0:43
20M
20.00 mi12:48:502:23:237:1010:25
7:40
-0:14
21M
21.00 mi12:57:152:31:487:148:25
8:25
+0:45
35K
21.75 mi13:02:402:37:137:145:25
7:14
-1:11
23M
23.00 mi13:12:232:46:567:159:43
7:46
+0:32
24M
24.00 mi13:20:022:54:357:167:39
7:39
-0:07
40K
24.85 mi13:26:423:01:157:186:40
7:48
+0:09
25.2M
25.20 mi13:29:393:04:127:192:57
8:33
+0:45
Finish
26.22 mi13:37:333:12:067:207:54
7:45
-0:48

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

6:52 /mi

Average Pace

7:20 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:50

59% of race

Time at Steady Pace

1:06:54

35% of race

Time at Slower Pace

11:22

6% of race

Average Pace: 7:20 /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 mi10:46:5821:316:5621:31
6:56
#7272
10K
6.21 mi11:08:2342:566:5521:25
6:54
#7229
15K
9.32 mi11:29:441:04:176:5421:21
6:52
#7058
20K
12.43 mi11:51:431:26:166:5621:59
7:05
#7136
Half
13.11 mi11:56:271:31:006:564:44
6:56
#7136
25K
15.53 mi12:13:521:48:256:5917:25
7:11
#7131
30K
18.64 mi12:38:252:12:587:0824:33
7:54
#7562
20M
20.00 mi12:48:502:23:237:1010:25
7:40
#7532
21M
21.00 mi12:57:152:31:487:148:25
8:25
#7591
35K
21.75 mi13:02:402:37:137:145:25
7:14
#7528
23M
23.00 mi13:12:232:46:567:159:43
7:46
#7517
24M
24.00 mi13:20:022:54:357:167:39
7:39
#7530
40K
24.85 mi13:26:423:01:157:186:40
7:48
#7535
25.2M
25.20 mi13:29:393:04:127:192:57
8:33
#7542
Finish
26.22 mi13:37:333:12:067:207:54
7:45
#7637
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi72727607606775(Top 24%)677(Top 6%)677(Top 39%)
10K6.21 mi3.10 mi7229+43750+10750+107207(Top 25%)753(Top 6%)753(Top 44%)
15K9.32 mi3.11 mi7058+171714+36714+366775(Top 24%)677(Top 6%)677(Top 39%)
20K12.43 mi3.11 mi7136-78747-33747-337390(Top 26%)893(Top 7%)893(Top 52%)
Half13.11 mi0.68 mi7136751-4751-47211(Top 25%)835(Top 7%)835(Top 49%)
25K15.53 mi2.42 mi7131+5766-15766-157505(Top 26%)1040(Top 9%)1040(Top 61%)
30K18.64 mi3.11 mi7562-431939-173939-17310648(Top 37%)2613(Top 21%)2613(Top 152%)
20M20.00 mi1.36 mi7532+30972-33972-338144(Top 29%)1590(Top 13%)1590(Top 93%)
21M21.00 mi1.00 mi7591-591029-571029-579963(Top 35%)2586(Top 21%)2586(Top 151%)
35K21.75 mi0.75 mi7528+631033-41033-46888(Top 24%)1239(Top 10%)1239(Top 72%)
23M23.00 mi1.25 mi7517+111065-321065-328320(Top 29%)1949(Top 16%)1949(Top 113%)
24M24.00 mi1.00 mi7530-131107-421107-428786(Top 31%)2212(Top 18%)2212(Top 129%)
40K24.85 mi0.85 mi7535-51141-341141-348754(Top 31%)2324(Top 19%)2324(Top 135%)
25.2M25.20 mi0.35 mi7542-71158-171158-179124(Top 32%)2561(Top 21%)2561(Top 149%)
Finish26.22 mi1.02 mi7637-951223-651223-6511098(Top 39%)3496(Top 29%)3496(Top 203%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21story building
+97ft-345ft

Overall

6775

Females

677

F40-44

677

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7207

Females

753

F40-44

753

10K→15K

6.2 - 9.3 mi

Top 24%
×3story building
+67ft-78ft

Overall

6775

Females

677

F40-44

677

15K→20K

9.3 - 12.4 mi

Top 26%
×5story building
+106ft-86ft

Overall

7390

Females

893

F40-44

893

20K→Half

12.4 - 13.1 mi

Top 25%
×2story building
+19ft-37ft

Overall

7211

Females

835

F40-44

835

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7505

Females

1040

F40-44

1040

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10648

Females

2613

F40-44

2613

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

8144

Females

1590

F40-44

1590

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9963

Females

2586

F40-44

2586

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6888

Females

1239

F40-44

1239

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

8320

Females

1949

F40-44

1949

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8786

Females

2212

F40-44

2212

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8754

Females

2324

F40-44

2324

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9124

Females

2561

F40-44

2561

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

11098

Females

3496

F40-44

3496

Passing Analysis

Category:
Athletes Passed
1354
Passed By
1719
Net Change
-365
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7272
5K → 10K222179+43#7272#7229
10K → 15K23564+171#7229#7058
15K → 20K118196-78#7058#7136
20K → Half17170#7136#7136
Half → 25K118113+5#7136#7131
25K → 30K81512-431#7131#7562
30K → 20M11181+30#7562#7532
20M → 21M70129-59#7532#7591
21M → 35K8623+63#7591#7528
35K → 23M10594+11#7528#7517
23M → 24M6679-13#7517#7530
24M → 40K6368-5#7530#7535
40K → 25.2M3138-7#7535#7542
25.2M → Finish31126-95#7542#7637
TOTALS13541719-365
📊

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