Boston Marathon logo
BOSTON MARATHON 2025

Nancy Dubois

Bib: 23683•F

QC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:31
Rank: #20108
Start → 5K
26:31 | 8:32/mi
10K· 6.21 mi
52:13
Rank: #19262 (+846)
5K → 10K
25:42 | 8:16/mi
15K· 9.32 mi
1:18:10
Rank: #18953 (+309)
10K → 15K
25:57 | 8:21/mi
20K· 12.43 mi
1:44:35
Rank: #18750 (+203)
15K → 20K
26:25 | 8:30/mi
Half· 13.11 mi
1:50:22
Rank: #18764 (-14)
20K → Half
5:47 | 8:29/mi
25K· 15.53 mi
2:14:37
Rank: #19873 (-1109)
Half → 25K
24:15 | 10:00/mi
30K· 18.64 mi
2:43:24
Rank: #19684 (+189)
25K → 30K
28:47 | 9:16/mi
20M
2:55:57
Rank: #19551 (+133)
30K → 20M
12:33 | 9:14/mi
21M
3:05:49
Rank: #19427 (+124)
20M → 21M
9:52 | 9:52/mi
35K· 21.75 mi
3:12:33
Rank: #19391 (+36)
21M → 35K
6:44 | 9:00/mi
23M
3:24:16
Rank: #19315 (+76)
35K → 23M
11:43 | 9:21/mi
24M
3:33:22
Rank: #19253 (+62)
23M → 24M
9:06 | 9:06/mi
40K· 24.85 mi
3:45:51
Rank: #20114 (-861)
24M → 40K
12:29 | 14:36/mi
25.2M
3:49:28
Rank: #20097 (+17)
40K → 25.2M
3:37 | 10:29/mi
Finish· 26.22 mi
3:58:29
Rank: #20050 (+47)
25.2M → Finish
9:01 | 8:51/mi

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
Time1:50:22
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time2:08:07
Pace9:46 /mi
📊Positive Split: 16.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5326:318:3226:31
8:32
-
10K
6.21 mi12:08:3552:138:2425:42
8:16
-0:16
15K
9.32 mi12:34:321:18:108:2325:57
8:21
+0:05
20K
12.43 mi13:00:571:44:358:2526:25
8:30
+0:09
Half
13.11 mi13:06:441:50:228:255:47
8:29
-0:01
25K
15.53 mi13:30:592:14:378:4024:15
10:00
+1:31
30K
18.64 mi13:59:462:43:248:4628:47
9:16
-0:44
20M
20.00 mi14:12:192:55:578:4812:33
9:14
-0:02
21M
21.00 mi14:22:113:05:498:519:52
9:52
+0:38
35K
21.75 mi14:28:553:12:338:516:44
9:00
-0:52
23M
23.00 mi14:40:383:24:168:5311:43
9:21
+0:21
24M
24.00 mi14:49:443:33:228:539:06
9:06
-0:15
40K
24.85 mi15:02:133:45:519:0512:29
14:36
+5:30
25.2M
25.20 mi15:05:503:49:289:063:37
10:29
-4:07
Finish
26.22 mi15:14:513:58:299:069:01
8:51
-1:38

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

8:16 /mi

Average Pace

9:06 /mi

Slowest Pace

14:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:42

11% of race

Time at Steady Pace

2:42:34

68% of race

Time at Slower Pace

50:13

21% of race

Average Pace: 9:06 /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 mi11:42:5326:318:3226:31
8:32
#20108
10K
6.21 mi12:08:3552:138:2425:42
8:16
#19262
15K
9.32 mi12:34:321:18:108:2325:57
8:21
#18953
20K
12.43 mi13:00:571:44:358:2526:25
8:30
#18750
Half
13.11 mi13:06:441:50:228:255:47
8:29
#18764
25K
15.53 mi13:30:592:14:378:4024:15
10:00
#19873
30K
18.64 mi13:59:462:43:248:4628:47
9:16
#19684
20M
20.00 mi14:12:192:55:578:4812:33
9:14
#19551
21M
21.00 mi14:22:113:05:498:519:52
9:52
#19427
35K
21.75 mi14:28:553:12:338:516:44
9:00
#19391
23M
23.00 mi14:40:383:24:168:5311:43
9:21
#19315
24M
24.00 mi14:49:443:33:228:539:06
9:06
#19253
40K
24.85 mi15:02:133:45:519:0512:29
14:36
#20114
25.2M
25.20 mi15:05:503:49:289:063:37
10:29
#20097
Finish
26.22 mi15:14:513:58:299:069:01
8:51
#20050
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi201087563756318410(Top 65%)6564(Top 54%)6564(Top 504%)
10K6.21 mi3.10 mi19262+8467046+5177046+51718385(Top 65%)6535(Top 53%)6535(Top 502%)
15K9.32 mi3.11 mi18953+3096881+1656881+16518410(Top 65%)6564(Top 54%)6564(Top 504%)
20K12.43 mi3.11 mi18750+2036760+1216760+12118282(Top 64%)6498(Top 53%)6498(Top 499%)
Half13.11 mi0.68 mi18764-146769-96769-919126(Top 67%)6985(Top 57%)6985(Top 536%)
25K15.53 mi2.42 mi19873-11097408-6397408-63923263(Top 82%)9338(Top 76%)9338(Top 717%)
30K18.64 mi3.11 mi19684+1897342+667342+6618969(Top 67%)7102(Top 58%)7102(Top 545%)
20M20.00 mi1.36 mi19551+1337291+517291+5117989(Top 63%)6718(Top 55%)6718(Top 516%)
21M21.00 mi1.00 mi19427+1247250+417250+4117798(Top 63%)6695(Top 55%)6695(Top 514%)
35K21.75 mi0.75 mi19391+367244+67244+618273(Top 64%)7065(Top 58%)7065(Top 542%)
23M23.00 mi1.25 mi19315+767231+137231+1318074(Top 64%)7023(Top 57%)7023(Top 539%)
24M24.00 mi1.00 mi19253+627217+147217+1417924(Top 63%)7001(Top 57%)7001(Top 537%)
40K24.85 mi0.85 mi20114-8617726-5097726-50927573(Top 97%)11905(Top 97%)11905(Top 914%)
25.2M25.20 mi0.35 mi20097+177721+57721+519002(Top 67%)7641(Top 62%)7641(Top 586%)
Finish26.22 mi1.02 mi20050+477709+127709+1218314(Top 64%)7252(Top 59%)7252(Top 557%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18410

Females

6564

F50-54

6564

5K→10K

3.1 - 6.2 mi

Top 65%
×5stories
+79ft-138ft

Overall

18385

Females

6535

F50-54

6535

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18410

Females

6564

F50-54

6564

15K→20K

9.3 - 12.4 mi

Top 64%
×5stories
+106ft-86ft

Overall

18282

Females

6498

F50-54

6498

20K→Half

12.4 - 13.1 mi

Top 67%
×2stories
+19ft-37ft

Overall

19126

Females

6985

F50-54

6985

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

23263

Females

9338

F50-54

9338

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

18969

Females

7102

F50-54

7102

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

17989

Females

6718

F50-54

6718

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17798

Females

6695

F50-54

6695

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

18273

Females

7065

F50-54

7065

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18074

Females

7023

F50-54

7023

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

17924

Females

7001

F50-54

7001

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27573

Females

11905

F50-54

11905

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19002

Females

7641

F50-54

7641

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18314

Females

7252

F50-54

7252

Passing Analysis

Category:
Athletes Passed
2674
Passed By
2616
Net Change
+58
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20108
5K → 10K89044+846#20108#19262
10K → 15K38273+309#19262#18953
15K → 20K28784+203#18953#18750
20K → Half3145-14#18750#18764
Half → 25K201129-1109#18764#19873
25K → 30K320131+189#19873#19684
30K → 20M16532+133#19684#19551
20M → 21M15834+124#19551#19427
21M → 35K6933+36#19427#19391
35K → 23M12751+76#19391#19315
23M → 24M9533+62#19315#19253
24M → 40K3864-861#19253#20114
40K → 25.2M3821+17#20114#20097
25.2M → Finish8942+47#20097#20050
TOTALS26742616+58
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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