Boston Marathon logo
BOSTON MARATHON 2025

Susan Harrington

Bib: 31637•F

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:00
Rank: #24717
Start → 5K
9:39/mi
30:00 split
10K· 6.21 mi
59:57
Rank: #24597 (+120)
5K → 10K
9:38/mi
29:57 split
15K· 9.32 mi
1:30:01
Rank: #24459 (+138)
10K → 15K
9:41/mi
30:04 split
20K· 12.43 mi
2:00:09
Rank: #24223 (+236)
15K → 20K
9:42/mi
30:08 split
Half· 13.11 mi
2:06:35
Rank: #24173 (+50)
20K → Half
9:26/mi
6:26 split
25K· 15.53 mi
2:30:25
Rank: #23939 (+234)
Half → 25K
9:50/mi
23:50 split
30K· 18.64 mi
3:01:49
Rank: #23538 (+401)
25K → 30K
10:06/mi
31:24 split
20M
3:15:55
Rank: #23424 (+114)
30K → 20M
10:23/mi
14:06 split
21M
3:27:07
Rank: #23315 (+109)
20M → 21M
11:12/mi
11:12 split
35K· 21.75 mi
3:34:28
Rank: #23257 (+58)
21M → 35K
9:49/mi
7:21 split
23M
3:47:15
Rank: #23140 (+117)
35K → 23M
10:13/mi
12:47 split
24M
3:57:37
Rank: #23103 (+37)
23M → 24M
10:22/mi
10:22 split
40K· 24.85 mi
4:06:33
Rank: #23039 (+64)
24M → 40K
10:27/mi
8:56 split
25.2M
4:10:33
Rank: #23043 (-4)
40K → 25.2M
11:36/mi
4:00 split
Finish· 26.22 mi
4:20:17
Rank: #22990 (+53)
25.2M → Finish
9:33/mi
9:44 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:35
Pace9:39 /mi
2nd Half
Distance13.11 mi
Time2:13:42
Pace10:12 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:1030:009:3930:00
9:39
-
10K
6.21 mi12:25:0759:579:3929:57
9:38
-0:01
15K
9.32 mi12:55:111:30:019:3930:04
9:41
+0:03
20K
12.43 mi13:25:192:00:099:4030:08
9:42
+0:01
Half
13.11 mi13:31:452:06:359:396:26
9:26
-0:16
25K
15.53 mi13:55:352:30:259:4123:50
9:50
+0:24
30K
18.64 mi14:26:593:01:499:4531:24
10:06
+0:16
20M
20.00 mi14:41:053:15:559:4814:06
10:23
+0:17
21M
21.00 mi14:52:173:27:079:5211:12
11:12
+0:49
35K
21.75 mi14:59:383:34:289:527:21
9:49
-1:23
23M
23.00 mi15:12:253:47:159:5312:47
10:13
+0:24
24M
24.00 mi15:22:473:57:379:5410:22
10:22
+0:09
40K
24.85 mi15:31:434:06:339:558:56
10:27
+0:05
25.2M
25.20 mi15:35:434:10:339:574:00
11:36
+1:09
Finish
26.22 mi15:45:274:20:179:569:44
9:33
-2:03

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

9:26 /mi

Average Pace

9:56 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

6:26

2% of race

Time at Steady Pace

3:12:28

74% of race

Time at Slower Pace

1:01:23

24% of race

Average Pace: 9:56 /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 mi11:55:1030:009:3930:00
9:39
#24717
10K
6.21 mi12:25:0759:579:3929:57
9:38
#24597
15K
9.32 mi12:55:111:30:019:3930:04
9:41
#24459
20K
12.43 mi13:25:192:00:099:4030:08
9:42
#24223
Half
13.11 mi13:31:452:06:359:396:26
9:26
#24173
25K
15.53 mi13:55:352:30:259:4123:50
9:50
#23939
30K
18.64 mi14:26:593:01:499:4531:24
10:06
#23538
20M
20.00 mi14:41:053:15:559:4814:06
10:23
#23424
21M
21.00 mi14:52:173:27:079:5211:12
11:12
#23315
35K
21.75 mi14:59:383:34:289:527:21
9:49
#23257
23M
23.00 mi15:12:253:47:159:5312:47
10:13
#23140
24M
24.00 mi15:22:473:57:379:5410:22
10:22
#23103
40K
24.85 mi15:31:434:06:339:558:56
10:27
#23039
25.2M
25.20 mi15:35:434:10:339:574:00
11:36
#23043
Finish
26.22 mi15:45:274:20:179:569:44
9:33
#22990
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi24717100691006924212(Top 85%)9788(Top 80%)9788(Top 570%)
10K6.21 mi3.10 mi24597+12010004+6510004+6524464(Top 86%)9944(Top 81%)9944(Top 579%)
15K9.32 mi3.11 mi24459+1389937+679937+6724212(Top 85%)9788(Top 80%)9788(Top 570%)
20K12.43 mi3.11 mi24223+2369815+1229815+12223490(Top 83%)9418(Top 77%)9418(Top 548%)
Half13.11 mi0.68 mi24173+509790+259790+2523371(Top 82%)9357(Top 77%)9357(Top 545%)
25K15.53 mi2.42 mi23939+2349665+1259665+12522849(Top 80%)9114(Top 75%)9114(Top 531%)
30K18.64 mi3.11 mi23538+4019478+1879478+18721931(Top 77%)8745(Top 72%)8745(Top 509%)
20M20.00 mi1.36 mi23424+1149428+509428+5022099(Top 78%)8952(Top 73%)8952(Top 521%)
21M21.00 mi1.00 mi23315+1099398+309398+3021917(Top 77%)8926(Top 73%)8926(Top 520%)
35K21.75 mi0.75 mi23257+589378+209378+2021425(Top 75%)8740(Top 71%)8740(Top 509%)
23M23.00 mi1.25 mi23140+1179347+319347+3121171(Top 75%)8645(Top 71%)8645(Top 503%)
24M24.00 mi1.00 mi23103+379347934722461(Top 79%)9374(Top 77%)9374(Top 546%)
40K24.85 mi0.85 mi23039+649326+219326+2121792(Top 77%)9089(Top 74%)9089(Top 529%)
25.2M25.20 mi0.35 mi23043-49333-79333-722342(Top 79%)9325(Top 76%)9325(Top 543%)
Finish26.22 mi1.02 mi22990+539314+199314+1921387(Top 75%)8858(Top 72%)8858(Top 516%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

24212

Females

9788

F40-44

9788

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

24464

Females

9944

F40-44

9944

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

24212

Females

9788

F40-44

9788

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

23490

Females

9418

F40-44

9418

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23371

Females

9357

F40-44

9357

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22849

Females

9114

F40-44

9114

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21931

Females

8745

F40-44

8745

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22099

Females

8952

F40-44

8952

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

21917

Females

8926

F40-44

8926

21M→35K

21.0 - 21.8 mi

Top 75%
×7story building
+17ft-86ft

Overall

21425

Females

8740

F40-44

8740

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21171

Females

8645

F40-44

8645

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22461

Females

9374

F40-44

9374

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21792

Females

9089

F40-44

9089

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22342

Females

9325

F40-44

9325

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21387

Females

8858

F40-44

8858

Passing Analysis

Category:
Athletes Passed
2182
Passed By
455
Net Change
+1727
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24717
5K → 10K261141+120#24717#24597
10K → 15K21375+138#24597#24459
15K → 20K27135+236#24459#24223
20K → Half566+50#24223#24173
Half → 25K26026+234#24173#23939
25K → 30K41312+401#23939#23538
30K → 20M13420+114#23538#23424
20M → 21M13425+109#23424#23315
21M → 35K7315+58#23315#23257
35K → 23M13821+117#23257#23140
23M → 24M6730+37#23140#23103
24M → 40K8117+64#23103#23039
40K → 25.2M1620-4#23039#23043
25.2M → Finish6512+53#23043#22990
TOTALS2182455+1727
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing