Boston Marathon logo
BOSTON MARATHON 2025

Julie Demarco

Bib: 23766•F

PA

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
27:51
Rank: #22277
Start → 5K
27:51 | 8:58/mi
10K· 6.21 mi
54:30
Rank: #21292 (+985)
5K → 10K
26:39 | 8:35/mi
15K· 9.32 mi
1:21:16
Rank: #20845 (+447)
10K → 15K
26:46 | 8:37/mi
20K· 12.43 mi
1:48:28
Rank: #20573 (+272)
15K → 20K
27:12 | 8:45/mi
Half· 13.11 mi
1:54:22
Rank: #20548 (+25)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:17:28
Rank: #20868 (-320)
Half → 25K
23:06 | 9:32/mi
30K· 18.64 mi
2:46:08
Rank: #20433 (+435)
25K → 30K
28:40 | 9:14/mi
20M
2:59:03
Rank: #20341 (+92)
30K → 20M
12:55 | 9:30/mi
21M
3:09:11
Rank: #20247 (+94)
20M → 21M
10:08 | 10:08/mi
35K· 21.75 mi
3:16:24
Rank: #20262 (-15)
21M → 35K
7:13 | 9:39/mi
23M
3:29:03
Rank: #20327 (-65)
35K → 23M
12:39 | 10:06/mi
24M
3:39:43
Rank: #20529 (-202)
23M → 24M
10:40 | 10:40/mi
40K· 24.85 mi
3:50:41
Rank: #20932 (-403)
24M → 40K
10:58 | 12:50/mi
25.2M
3:55:39
Rank: #21097 (-165)
40K → 25.2M
4:58 | 14:24/mi
Finish· 26.22 mi
4:05:18
Rank: #21088 (+9)
25.2M → Finish
9:39 | 9:28/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
Time1:54:22
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:10:56
Pace9:59 /mi
📊Positive Split: 14.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:2927:518:5827:51
8:58
-
10K
6.21 mi11:54:0854:308:4626:39
8:35
-0:23
15K
9.32 mi12:20:541:21:168:4326:46
8:37
+0:02
20K
12.43 mi12:48:061:48:288:4427:12
8:45
+0:08
Half
13.11 mi12:54:001:54:228:435:54
8:39
-0:06
25K
15.53 mi13:17:062:17:288:5123:06
9:32
+0:53
30K
18.64 mi13:45:462:46:088:5528:40
9:14
-0:18
20M
20.00 mi13:58:412:59:038:5712:55
9:30
+0:16
21M
21.00 mi14:08:493:09:119:0110:08
10:08
+0:38
35K
21.75 mi14:16:023:16:249:027:13
9:39
-0:29
23M
23.00 mi14:28:413:29:039:0512:39
10:06
+0:27
24M
24.00 mi14:39:213:39:439:0910:40
10:40
+0:34
40K
24.85 mi14:50:193:50:419:1710:58
12:50
+2:10
25.2M
25.20 mi14:55:173:55:399:214:58
14:24
+1:34
Finish
26.22 mi15:04:564:05:189:229:39
9:28
-4:56

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

8:35 /mi

Average Pace

9:22 /mi

Slowest Pace

14:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:19

24% of race

Time at Steady Pace

2:39:23

65% of race

Time at Slower Pace

26:36

11% of race

Average Pace: 9:21 /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 mi11:27:2927:518:5827:51
8:58
#22277
10K
6.21 mi11:54:0854:308:4626:39
8:35
#21292
15K
9.32 mi12:20:541:21:168:4326:46
8:37
#20845
20K
12.43 mi12:48:061:48:288:4427:12
8:45
#20573
Half
13.11 mi12:54:001:54:228:435:54
8:39
#20548
25K
15.53 mi13:17:062:17:288:5123:06
9:32
#20868
30K
18.64 mi13:45:462:46:088:5528:40
9:14
#20433
20M
20.00 mi13:58:412:59:038:5712:55
9:30
#20341
21M
21.00 mi14:08:493:09:119:0110:08
10:08
#20247
35K
21.75 mi14:16:023:16:249:027:13
9:39
#20262
23M
23.00 mi14:28:413:29:039:0512:39
10:06
#20327
24M
24.00 mi14:39:213:39:439:0910:40
10:40
#20529
40K
24.85 mi14:50:193:50:419:1710:58
12:50
#20932
25.2M
25.20 mi14:55:173:55:399:214:58
14:24
#21097
Finish
26.22 mi15:04:564:05:189:229:39
9:28
#21088
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi222778783878320020(Top 70%)7453(Top 61%)7453(Top 572%)
10K6.21 mi3.10 mi21292+9858211+5728211+57220250(Top 71%)7608(Top 62%)7608(Top 584%)
15K9.32 mi3.11 mi20845+4477953+2587953+25820020(Top 70%)7453(Top 61%)7453(Top 572%)
20K12.43 mi3.11 mi20573+2727800+1537800+15319723(Top 69%)7333(Top 60%)7333(Top 563%)
Half13.11 mi0.68 mi20548+257786+147786+1420120(Top 71%)7560(Top 62%)7560(Top 580%)
25K15.53 mi2.42 mi20868-3207965-1797965-17921954(Top 77%)8624(Top 71%)8624(Top 662%)
30K18.64 mi3.11 mi20433+4357782+1837782+18318775(Top 66%)7000(Top 57%)7000(Top 537%)
20M20.00 mi1.36 mi20341+927746+367746+3619228(Top 68%)7393(Top 60%)7393(Top 567%)
21M21.00 mi1.00 mi20247+947719+277719+2718830(Top 66%)7255(Top 59%)7255(Top 557%)
35K21.75 mi0.75 mi20262-157741-227741-2220849(Top 73%)8419(Top 69%)8419(Top 646%)
23M23.00 mi1.25 mi20327-657804-637804-6320833(Top 73%)8470(Top 69%)8470(Top 650%)
24M24.00 mi1.00 mi20529-2027916-1127916-11223245(Top 82%)9756(Top 80%)9756(Top 749%)
40K24.85 mi0.85 mi20932-4038162-2468162-24626113(Top 92%)11192(Top 92%)11192(Top 859%)
25.2M25.20 mi0.35 mi21097-1658262-1008262-10026672(Top 94%)11499(Top 94%)11499(Top 883%)
Finish26.22 mi1.02 mi21088+98269-78269-721077(Top 74%)8694(Top 71%)8694(Top 667%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

20020

Females

7453

F50-54

7453

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

20250

Females

7608

F50-54

7608

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

20020

Females

7453

F50-54

7453

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

19723

Females

7333

F50-54

7333

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20120

Females

7560

F50-54

7560

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21954

Females

8624

F50-54

8624

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18775

Females

7000

F50-54

7000

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

19228

Females

7393

F50-54

7393

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

18830

Females

7255

F50-54

7255

21M→35K

21.0 - 21.8 mi

Top 73%
×7stories
+17ft-86ft

Overall

20849

Females

8419

F50-54

8419

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

20833

Females

8470

F50-54

8470

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

23245

Females

9756

F50-54

9756

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26113

Females

11192

F50-54

11192

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

26672

Females

11499

F50-54

11499

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

21077

Females

8694

F50-54

8694

Passing Analysis

Category:
Athletes Passed
2882
Passed By
1693
Net Change
+1189
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22277
5K → 10K101631+985#22277#21292
10K → 15K48538+447#21292#20845
15K → 20K32957+272#20845#20573
20K → Half5227+25#20573#20548
Half → 25K63383-320#20548#20868
25K → 30K46732+435#20868#20433
30K → 20M13745+92#20433#20341
20M → 21M13945+94#20341#20247
21M → 35K5166-15#20247#20262
35K → 23M71136-65#20262#20327
23M → 24M16218-202#20327#20529
24M → 40K6409-403#20529#20932
40K → 25.2M5170-165#20932#21097
25.2M → Finish4536+9#21097#21088
TOTALS28821693+1189
📊

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