Boston Marathon logo
BOSTON MARATHON 2025

Heather Dennis

Bib: 19464•F

CO

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
Top 49%
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
8:11/mi
25:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
51:29
↑ 79↓ 1380.4%
15K· 9.32 mi
8:34/mi
1:18:06
↑ 67↓ 78
20K· 12.43 mi
8:40/mi
1:45:01
↑ 106↓ 860.1%
Half· 13.11 mi
8:45/mi
1:50:59
↑ 19↓ 370.5%
25K· 15.53 mi
8:55/mi
2:12:36
↑ 66↓ 880.2%
30K· 18.64 mi
9:21/mi
2:41:38
↑ 181↓ 1480.2%
20M
9:36/mi
2:54:41
↑ 64↓ 500.2%
21M
10:21/mi
3:05:02
↑ 106↓ 241.6%
35K· 21.75 mi
9:24/mi
3:12:04
↑ 17↓ 861.7%
23M
9:32/mi
3:24:00
↑ 23↓ 630.6%
24M
9:12/mi
3:33:12
↓ 821.3%
40K· 24.85 mi
9:19/mi
3:41:10
↓ 200.3%
25.2M
10:06/mi
3:44:39
↑ 13↓ 160.2%
Finish· 26.22 mi
9:07/mi
3:53:56
↑ 22↓ 21

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
Time1:50:59
Pace8:28 /mi
2nd Half
Distance13.11 mi
Time2:02:57
Pace9:23 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:4725:268:1125:26
8:11
-
10K
6.21 mi11:42:5051:298:1726:03
8:23
+0:12
15K
9.32 mi12:09:271:18:068:2326:37
8:34
+0:11
20K
12.43 mi12:36:221:45:018:2726:55
8:40
+0:06
Half
13.11 mi12:42:201:50:598:285:58
8:45
+0:05
25K
15.53 mi13:03:572:12:368:3221:37
8:55
+0:10
30K
18.64 mi13:32:592:41:388:4029:02
9:21
+0:26
20M
20.00 mi13:46:022:54:418:4413:03
9:36
+0:15
21M
21.00 mi13:56:233:05:028:4910:21
10:21
+0:45
35K
21.75 mi14:03:253:12:048:507:02
9:24
-0:57
23M
23.00 mi14:15:213:24:008:5211:56
9:32
+0:08
24M
24.00 mi14:24:333:33:128:539:12
9:12
-0:20
40K
24.85 mi14:32:313:41:108:547:58
9:19
+0:07
25.2M
25.20 mi14:36:003:44:398:553:29
10:06
+0:47
Finish
26.22 mi14:45:173:53:568:569:17
9:07
-0:59

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

8:11 /mi

Average Pace

8:56 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:59

47% of race

Time at Steady Pace

1:24:08

36% of race

Time at Slower Pace

38:49

17% of race

Average Pace: 8:55 /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 mi11:16:4725:268:1125:26
8:11
#18030
10K
6.21 mi11:42:5051:298:1726:03
8:23
#18520
15K
9.32 mi12:09:271:18:068:2326:37
8:34
#18909
20K
12.43 mi12:36:221:45:018:2726:55
8:40
#18960
Half
13.11 mi12:42:201:50:598:285:58
8:45
#19039
25K
15.53 mi13:03:572:12:368:3221:37
8:55
#19136
30K
18.64 mi13:32:592:41:388:4029:02
9:21
#19177
20M
20.00 mi13:46:022:54:418:4413:03
9:36
#19199
21M
21.00 mi13:56:233:05:028:4910:21
10:21
#19240
35K
21.75 mi14:03:253:12:048:507:02
9:24
#19276
23M
23.00 mi14:15:213:24:008:5211:56
9:32
#19254
24M
24.00 mi14:24:333:33:128:539:12
9:12
#19214
40K
24.85 mi14:32:313:41:108:547:58
9:19
#19153
25.2M
25.20 mi14:36:003:44:398:553:29
10:06
#19107
Finish
26.22 mi14:45:173:53:568:569:17
9:07
#19118
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi180306363636319744(Top 70%)7295(Top 60%)7295(Top 560%)
10K6.21 mi3.10 mi18520-4906629-2666629-26619103(Top 67%)6943(Top 57%)6943(Top 533%)
15K9.32 mi3.11 mi18909-3896858-2296858-22919744(Top 70%)7295(Top 60%)7295(Top 560%)
20K12.43 mi3.11 mi18960-516880-226880-2219229(Top 68%)7040(Top 58%)7040(Top 540%)
Half13.11 mi0.68 mi19039-796929-496929-4920654(Top 73%)7839(Top 64%)7839(Top 602%)
25K15.53 mi2.42 mi19136-976990-616990-6119502(Top 69%)7260(Top 59%)7260(Top 557%)
30K18.64 mi3.11 mi19177-417059-697059-6919322(Top 68%)7296(Top 60%)7296(Top 560%)
20M20.00 mi1.36 mi19199-227091-327091-3219637(Top 69%)7597(Top 62%)7597(Top 583%)
21M21.00 mi1.00 mi19240-417138-477138-4719549(Top 69%)7650(Top 63%)7650(Top 587%)
35K21.75 mi0.75 mi19276-367173-357173-3519966(Top 70%)7957(Top 65%)7957(Top 611%)
23M23.00 mi1.25 mi19254+227192-197192-1918853(Top 66%)7432(Top 61%)7432(Top 570%)
24M24.00 mi1.00 mi19214+407194-27194-218375(Top 65%)7240(Top 59%)7240(Top 556%)
40K24.85 mi0.85 mi19153+617179+157179+1517955(Top 63%)7109(Top 58%)7109(Top 546%)
25.2M25.20 mi0.35 mi19107+467168+117168+1117530(Top 62%)6884(Top 56%)6884(Top 528%)
Finish26.22 mi1.02 mi19118-117194-267194-2619564(Top 69%)7901(Top 65%)7901(Top 606%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

19744

Females

7295

F50-54

7295

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19103

Females

6943

F50-54

6943

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

19744

Females

7295

F50-54

7295

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

19229

Females

7040

F50-54

7040

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

20654

Females

7839

F50-54

7839

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

19502

Females

7260

F50-54

7260

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

19322

Females

7296

F50-54

7296

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

19637

Females

7597

F50-54

7597

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19549

Females

7650

F50-54

7650

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

19966

Females

7957

F50-54

7957

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18853

Females

7432

F50-54

7432

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

18375

Females

7240

F50-54

7240

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17955

Females

7109

F50-54

7109

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17530

Females

6884

F50-54

6884

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19564

Females

7901

F50-54

7901

Passing Analysis

Category:
Athletes Passed
1364
Passed By
2452
Net Change
-1088
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18030
5K → 10K120610-490#18030#18520
10K → 15K83472-389#18520#18909
15K → 20K184235-51#18909#18960
20K → Half1089-79#18960#19039
Half → 25K136233-97#19039#19136
25K → 30K215256-41#19136#19177
30K → 20M100122-22#19177#19199
20M → 21M85126-41#19199#19240
21M → 35K4480-36#19240#19276
35K → 23M10583+22#19276#19254
23M → 24M8444+40#19254#19214
24M → 40K9534+61#19214#19153
40K → 25.2M5711+46#19153#19107
25.2M → Finish4657-11#19107#19118
TOTALS13642452-1088
📊

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing