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BOSTON MARATHON 2025

Susin Carlson

Bib: 29725•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 (F55-59)
#0 / 994
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
9:34/mi
29:43
↑ 97↓ 3451.5%
10K· 6.21 mi
9:37/mi
59:35
↑ 79↓ 1380.4%
15K· 9.32 mi
10:04/mi
1:30:52
↑ 67↓ 78
20K· 12.43 mi
11:35/mi
2:06:50
↑ 106↓ 860.1%
Half· 13.11 mi
10:33/mi
2:14:02
↑ 19↓ 370.5%
25K· 15.53 mi
12:57/mi
2:45:27
↑ 66↓ 880.2%
30K· 18.64 mi
14:34/mi
3:30:41
↑ 181↓ 1480.2%
20M
14:36/mi
3:50:32
↑ 64↓ 500.2%
21M
14:21/mi
4:04:53
↑ 106↓ 241.6%
35K· 21.75 mi
16:10/mi
4:16:59
↑ 17↓ 861.7%
23M
13:53/mi
4:34:22
↑ 23↓ 630.6%
24M
14:26/mi
4:48:48
↓ 821.3%
40K· 24.85 mi
14:26/mi
5:01:09
↓ 200.3%
25.2M
15:54/mi
5:06:38
↑ 13↓ 160.2%
Finish· 26.22 mi
14:10/mi
5:21:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:14:02
Pace10:13 /mi
2nd Half
Distance13.11 mi
Time3:07:02
Pace14:16 /mi
📊Positive Split: 39.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4929:439:3429:43
9:34
-
10K
6.21 mi12:18:4159:359:3529:52
9:37
+0:03
15K
9.32 mi12:49:581:30:529:4531:17
10:04
+0:27
20K
12.43 mi13:25:562:06:5010:1235:58
11:35
+1:31
Half
13.11 mi13:33:082:14:0210:137:12
10:33
-1:02
25K
15.53 mi14:04:332:45:2710:3931:25
12:57
+2:24
30K
18.64 mi14:49:473:30:4111:1845:14
14:34
+1:37
20M
20.00 mi15:09:383:50:3211:3219:51
14:36
+0:02
21M
21.00 mi15:23:594:04:5311:4014:21
14:21
-0:15
35K
21.75 mi15:36:054:16:5911:4912:06
16:10
+1:49
23M
23.00 mi15:53:284:34:2211:5617:23
13:53
-2:17
24M
24.00 mi16:07:544:48:4812:0214:26
14:26
+0:33
40K
24.85 mi16:20:155:01:0912:0712:21
14:26
0:00
25.2M
25.20 mi16:25:445:06:3812:105:29
15:54
+1:28
Finish
26.22 mi16:40:105:21:0412:1514:26
14:10
-1:44

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

9:34 /mi

Average Pace

12:15 /mi

Slowest Pace

16:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:45:27

52% of race

Time at Steady Pace

2:18:02

43% of race

Time at Slower Pace

17:35

5% of race

Average Pace: 12:15 /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 mi11:48:4929:439:3429:43
9:34
#24449
10K
6.21 mi12:18:4159:359:3529:52
9:37
#24422
15K
9.32 mi12:49:581:30:529:4531:17
10:04
#24704
20K
12.43 mi13:25:562:06:5010:1235:58
11:35
#25445
Half
13.11 mi13:33:082:14:0210:137:12
10:33
#25456
25K
15.53 mi14:04:332:45:2710:3931:25
12:57
#25964
30K
18.64 mi14:49:473:30:4111:1845:14
14:34
#26546
20M
20.00 mi15:09:383:50:3211:3219:51
14:36
#26683
21M
21.00 mi15:23:594:04:5311:4014:21
14:21
#26693
35K
21.75 mi15:36:054:16:5911:4912:06
16:10
#26850
23M
23.00 mi15:53:284:34:2211:5617:23
13:53
#26905
24M
24.00 mi16:07:544:48:4812:0214:26
14:26
#26969
40K
24.85 mi16:20:155:01:0912:0712:21
14:26
#26990
25.2M
25.20 mi16:25:445:06:3812:105:29
15:54
#27010
Finish
26.22 mi16:40:105:21:0412:1514:26
14:10
#27098
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi244499936993625132(Top 88%)10296(Top 84%)10296(Top 1036%)
10K6.21 mi3.10 mi24422+279908+289908+2824390(Top 86%)9907(Top 81%)9907(Top 997%)
15K9.32 mi3.11 mi24704-28210065-15710065-15725132(Top 88%)10296(Top 84%)10296(Top 1036%)
20K12.43 mi3.11 mi25445-74110483-41810483-41826713(Top 94%)11223(Top 92%)11223(Top 1129%)
Half13.11 mi0.68 mi25456-1110487-410487-425872(Top 91%)10760(Top 88%)10760(Top 1082%)
25K15.53 mi2.42 mi25964-50810775-28810775-28827262(Top 96%)11578(Top 95%)11578(Top 1165%)
30K18.64 mi3.11 mi26546-58211132-35711132-35727830(Top 98%)11966(Top 98%)11966(Top 1204%)
20M20.00 mi1.36 mi26683-13711223-9111223-9127689(Top 97%)11913(Top 97%)11913(Top 1198%)
21M21.00 mi1.00 mi26693-1011234-1111234-1126566(Top 94%)11349(Top 93%)11349(Top 1142%)
35K21.75 mi0.75 mi26850-15711331-9711331-9728268(Top 100%)12180(Top 100%)12180(Top 1225%)
23M23.00 mi1.25 mi26905-5511363-3211363-3227228(Top 96%)11718(Top 96%)11718(Top 1179%)
24M24.00 mi1.00 mi26969-6411411-4811411-4827854(Top 98%)12047(Top 99%)12047(Top 1212%)
40K24.85 mi0.85 mi26990-2111436-2511436-2527481(Top 97%)11858(Top 97%)11858(Top 1193%)
25.2M25.20 mi0.35 mi27010-2011449-1311449-1327647(Top 97%)11954(Top 98%)11954(Top 1203%)
Finish26.22 mi1.02 mi27098-8811506-5711506-5728092(Top 99%)12122(Top 99%)12122(Top 1220%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

25132

Females

10296

F55-59

10296

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

24390

Females

9907

F55-59

9907

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

25132

Females

10296

F55-59

10296

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

26713

Females

11223

F55-59

11223

20K→Half

12.4 - 13.1 mi

Top 91%
×2story building
+19ft-37ft

Overall

25872

Females

10760

F55-59

10760

Half→25K

13.1 - 15.5 mi

Top 96%
×4story building
+66ft-88ft

Overall

27262

Females

11578

F55-59

11578

25K→30K

15.5 - 18.6 mi

Top 98%
×9story building
+181ft-148ft

Overall

27830

Females

11966

F55-59

11966

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

27689

Females

11913

F55-59

11913

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

26566

Females

11349

F55-59

11349

21M→35K

21.0 - 21.8 mi

Top 100%
×7story building
+17ft-86ft

Overall

28268

Females

12180

F55-59

12180

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27228

Females

11718

F55-59

11718

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

27854

Females

12047

F55-59

12047

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27481

Females

11858

F55-59

11858

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

27647

Females

11954

F55-59

11954

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

28092

Females

12122

F55-59

12122

Passing Analysis

Category:
Athletes Passed
445
Passed By
3094
Net Change
-2649
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24449
5K → 10K228201+27#24449#24422
10K → 15K58340-282#24422#24704
15K → 20K11752-741#24704#25445
20K → Half2334-11#25445#25456
Half → 25K14522-508#25456#25964
25K → 30K17599-582#25964#26546
30K → 20M13150-137#26546#26683
20M → 21M3444-10#26683#26693
21M → 35K2159-157#26693#26850
35K → 23M1368-55#26850#26905
23M → 24M1175-64#26905#26969
24M → 40K1637-21#26969#26990
40K → 25.2M323-20#26990#27010
25.2M → Finish290-88#27010#27098
TOTALS4453094-2649
📊

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