Boston Marathon logo
BOSTON MARATHON 2025

Helen Byrne

Bib: 21182•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 41%
Division (F50-54)
#0 / 1303
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:03
Rank: #17121
Start → 5K
25:03 | 8:04/mi
10K· 6.21 mi
50:54
Rank: #17935 (-814)
5K → 10K
25:51 | 8:19/mi
15K· 9.32 mi
1:16:30
Rank: #17808 (+127)
10K → 15K
25:36 | 8:14/mi
20K· 12.43 mi
1:42:48
Rank: #17833 (-25)
15K → 20K
26:18 | 8:28/mi
Half· 13.11 mi
1:48:16
Rank: #17726 (+107)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:08:46
Rank: #17534 (+192)
Half → 25K
20:30 | 8:27/mi
30K· 18.64 mi
2:36:45
Rank: #17530 (+4)
25K → 30K
27:59 | 9:00/mi
20M
2:49:02
Rank: #17469 (+61)
30K → 20M
12:17 | 9:02/mi
21M
2:59:17
Rank: #17604 (-135)
20M → 21M
10:15 | 10:15/mi
35K· 21.75 mi
3:05:26
Rank: #17453 (+151)
21M → 35K
6:09 | 8:13/mi
23M
3:17:26
Rank: #17562 (-109)
35K → 23M
12:00 | 9:35/mi
24M
3:26:00
Rank: #17441 (+121)
23M → 24M
8:34 | 8:34/mi
40K· 24.85 mi
3:33:48
Rank: #17426 (+15)
24M → 40K
7:48 | 9:07/mi
25.2M
3:37:15
Rank: #17426
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:46:30
Rank: #17494 (-68)
25.2M → Finish
9:15 | 9:05/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
Time1:48:16
Pace8:16 /mi
2nd Half
Distance13.11 mi
Time1:58:14
Pace9:01 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0325:038:0425:03
8:04
-
10K
6.21 mi11:43:5450:548:1125:51
8:19
+0:15
15K
9.32 mi12:09:301:16:308:1225:36
8:14
-0:05
20K
12.43 mi12:35:481:42:488:1626:18
8:28
+0:14
Half
13.11 mi12:41:161:48:168:165:28
8:01
-0:27
25K
15.53 mi13:01:462:08:468:1720:30
8:27
+0:26
30K
18.64 mi13:29:452:36:458:2527:59
9:00
+0:33
20M
20.00 mi13:42:022:49:028:2712:17
9:02
+0:02
21M
21.00 mi13:52:172:59:178:3210:15
10:15
+1:13
35K
21.75 mi13:58:263:05:268:326:09
8:13
-2:02
23M
23.00 mi14:10:263:17:268:3512:00
9:35
+1:22
24M
24.00 mi14:19:003:26:008:358:34
8:34
-1:01
40K
24.85 mi14:26:483:33:488:367:48
9:07
+0:33
25.2M
25.20 mi14:30:153:37:158:373:27
10:00
+0:53
Finish
26.22 mi14:39:303:46:308:399:15
9:05
-0:55

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

8:01 /mi

Average Pace

8:39 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

36:40

16% of race

Time at Steady Pace

1:46:49

47% of race

Time at Slower Pace

1:23:01

37% of race

Average Pace: 8:38 /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 mi11:18:0325:038:0425:03
8:04
#17121
10K
6.21 mi11:43:5450:548:1125:51
8:19
#17935
15K
9.32 mi12:09:301:16:308:1225:36
8:14
#17808
20K
12.43 mi12:35:481:42:488:1626:18
8:28
#17833
Half
13.11 mi12:41:161:48:168:165:28
8:01
#17726
25K
15.53 mi13:01:462:08:468:1720:30
8:27
#17534
30K
18.64 mi13:29:452:36:458:2527:59
9:00
#17530
20M
20.00 mi13:42:022:49:028:2712:17
9:02
#17469
21M
21.00 mi13:52:172:59:178:3210:15
10:15
#17604
35K
21.75 mi13:58:263:05:268:326:09
8:13
#17453
23M
23.00 mi14:10:263:17:268:3512:00
9:35
#17562
24M
24.00 mi14:19:003:26:008:358:34
8:34
#17441
40K
24.85 mi14:26:483:33:488:367:48
9:07
#17426
25.2M
25.20 mi14:30:153:37:158:373:27
10:00
#17426
Finish
26.22 mi14:39:303:46:308:399:15
9:05
#17494
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi171215811581117670(Top 62%)6124(Top 50%)6124(Top 470%)
10K6.21 mi3.10 mi17935-8146284-4736284-47318679(Top 66%)6694(Top 55%)6694(Top 514%)
15K9.32 mi3.11 mi17808+1276212+726212+7217670(Top 62%)6124(Top 50%)6124(Top 470%)
20K12.43 mi3.11 mi17833-256242-306242-3017997(Top 63%)6337(Top 52%)6337(Top 486%)
Half13.11 mi0.68 mi17726+1076176+666176+6616103(Top 57%)5264(Top 43%)5264(Top 404%)
25K15.53 mi2.42 mi17534+1926082+946082+9416931(Top 60%)5820(Top 48%)5820(Top 447%)
30K18.64 mi3.11 mi17530+46140-586140-5817733(Top 62%)6431(Top 53%)6431(Top 494%)
20M20.00 mi1.36 mi17469+616130+106130+1017029(Top 60%)6151(Top 50%)6151(Top 472%)
21M21.00 mi1.00 mi17604-1356223-936223-9319198(Top 68%)7433(Top 61%)7433(Top 570%)
35K21.75 mi0.75 mi17453+1516167+566167+5613826(Top 49%)4606(Top 38%)4606(Top 353%)
23M23.00 mi1.25 mi17562-1096262-956262-9519033(Top 67%)7527(Top 62%)7527(Top 578%)
24M24.00 mi1.00 mi17441+1216214+486214+4814978(Top 53%)5373(Top 44%)5373(Top 412%)
40K24.85 mi0.85 mi17426+156234-206234-2016994(Top 60%)6577(Top 54%)6577(Top 505%)
25.2M25.20 mi0.35 mi174266242-86242-817103(Top 60%)6641(Top 54%)6641(Top 510%)
Finish26.22 mi1.02 mi17494-686312-706312-7019421(Top 68%)7821(Top 64%)7821(Top 600%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21stories
+97ft-345ft

Overall

17670

Females

6124

F50-54

6124

5K→10K

3.1 - 6.2 mi

Top 66%
×5stories
+79ft-138ft

Overall

18679

Females

6694

F50-54

6694

10K→15K

6.2 - 9.3 mi

Top 62%
×3stories
+67ft-78ft

Overall

17670

Females

6124

F50-54

6124

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

17997

Females

6337

F50-54

6337

20K→Half

12.4 - 13.1 mi

Top 57%
×2stories
+19ft-37ft

Overall

16103

Females

5264

F50-54

5264

Half→25K

13.1 - 15.5 mi

Top 60%
×4stories
+66ft-88ft

Overall

16931

Females

5820

F50-54

5820

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

17733

Females

6431

F50-54

6431

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

17029

Females

6151

F50-54

6151

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

19198

Females

7433

F50-54

7433

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13826

Females

4606

F50-54

4606

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

19033

Females

7527

F50-54

7527

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

14978

Females

5373

F50-54

5373

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

16994

Females

6577

F50-54

6577

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17103

Females

6641

F50-54

6641

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

19421

Females

7821

F50-54

7821

Passing Analysis

Category:
Athletes Passed
1844
Passed By
2217
Net Change
-373
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17121
5K → 10K82896-814#17121#17935
10K → 15K254127+127#17935#17808
15K → 20K177202-25#17808#17833
20K → Half1103+107#17833#17726
Half → 25K25462+192#17726#17534
25K → 30K227223+4#17534#17530
30K → 20M13978+61#17530#17469
20M → 21M70205-135#17469#17604
21M → 35K1576+151#17604#17453
35K → 23M84193-109#17453#17562
23M → 24M13817+121#17562#17441
24M → 40K7863+15#17441#17426
40K → 25.2M30300#17426#17426
25.2M → Finish44112-68#17426#17494
TOTALS18442217-373
📊

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