Boston Marathon logo
BOSTON MARATHON 2025

Estefania Demarchi

Bib: 21776•F

IL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 43%
Masters (Masters Women)
#0 / 6759
Top 29%
Division (F45-49)
#0 / 1813
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:11
Rank: #14683
Start → 5K
24:11 | 7:47/mi
10K· 6.21 mi
49:00
Rank: #15546 (-863)
5K → 10K
24:49 | 7:59/mi
15K· 9.32 mi
1:14:00
Rank: #15841 (-295)
10K → 15K
25:00 | 8:03/mi
20K· 12.43 mi
1:39:21
Rank: #15876 (-35)
15K → 20K
25:21 | 8:10/mi
Half· 13.11 mi
1:45:01
Rank: #16012 (-136)
20K → Half
5:40 | 8:18/mi
25K· 15.53 mi
2:04:49
Rank: #15849 (+163)
Half → 25K
19:48 | 8:10/mi
30K· 18.64 mi
2:31:18
Rank: #15637 (+212)
25K → 30K
26:29 | 8:31/mi
20M
2:43:37
Rank: #15712 (-75)
30K → 20M
12:19 | 9:04/mi
21M
2:52:43
Rank: #15568 (+144)
20M → 21M
9:06 | 9:06/mi
35K· 21.75 mi
2:59:15
Rank: #15611 (-43)
21M → 35K
6:32 | 8:44/mi
23M
3:10:42
Rank: #15657 (-46)
35K → 23M
11:27 | 9:09/mi
24M
3:19:42
Rank: #15699 (-42)
23M → 24M
9:00 | 9:00/mi
40K· 24.85 mi
3:27:29
Rank: #15726 (-27)
24M → 40K
7:47 | 9:06/mi
25.2M
3:30:45
Rank: #15699 (+27)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:39:08
Rank: #15657 (+42)
25.2M → Finish
8:23 | 8:14/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
Time1:45:01
Pace8:01 /mi
2nd Half
Distance13.11 mi
Time1:54:07
Pace8:42 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2324:117:4724:11
7:47
-
10K
6.21 mi11:45:1249:007:5324:49
7:59
+0:12
15K
9.32 mi12:10:121:14:007:5625:00
8:03
+0:04
20K
12.43 mi12:35:331:39:218:0025:21
8:10
+0:07
Half
13.11 mi12:41:131:45:018:015:40
8:18
+0:08
25K
15.53 mi13:01:012:04:498:0219:48
8:10
-0:08
30K
18.64 mi13:27:302:31:188:0726:29
8:31
+0:21
20M
20.00 mi13:39:492:43:378:1112:19
9:04
+0:33
21M
21.00 mi13:48:552:52:438:139:06
9:06
+0:02
35K
21.75 mi13:55:272:59:158:156:32
8:44
-0:22
23M
23.00 mi14:06:543:10:428:1711:27
9:09
+0:25
24M
24.00 mi14:15:543:19:428:199:00
9:00
-0:09
40K
24.85 mi14:23:413:27:298:217:47
9:06
+0:06
25.2M
25.20 mi14:26:573:30:458:223:16
9:28
+0:22
Finish
26.22 mi14:35:203:39:088:228:23
8:14
-1:14

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

7:47 /mi

Average Pace

8:22 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:32

58% of race

Time at Steady Pace

38:41

18% of race

Time at Slower Pace

52:55

24% of race

Average Pace: 8:21 /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 mi11:20:2324:117:4724:11
7:47
#14683
10K
6.21 mi11:45:1249:007:5324:49
7:59
#15546
15K
9.32 mi12:10:121:14:007:5625:00
8:03
#15841
20K
12.43 mi12:35:331:39:218:0025:21
8:10
#15876
Half
13.11 mi12:41:131:45:018:015:40
8:18
#16012
25K
15.53 mi13:01:012:04:498:0219:48
8:10
#15849
30K
18.64 mi13:27:302:31:188:0726:29
8:31
#15637
20M
20.00 mi13:39:492:43:378:1112:19
9:04
#15712
21M
21.00 mi13:48:552:52:438:139:06
9:06
#15568
35K
21.75 mi13:55:272:59:158:156:32
8:44
#15611
23M
23.00 mi14:06:543:10:428:1711:27
9:09
#15657
24M
24.00 mi14:15:543:19:428:199:00
9:00
#15699
40K
24.85 mi14:23:413:27:298:217:47
9:06
#15726
25.2M
25.20 mi14:26:573:30:458:223:16
9:28
#15699
Finish
26.22 mi14:35:203:39:088:228:23
8:14
#15657
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi146834339433916394(Top 58%)5375(Top 44%)5375(Top 296%)
10K6.21 mi3.10 mi15546-8634868-5294868-52916392(Top 58%)5362(Top 44%)5362(Top 296%)
15K9.32 mi3.11 mi15841-2955042-1745042-17416394(Top 58%)5375(Top 44%)5375(Top 296%)
20K12.43 mi3.11 mi15876-355077-355077-3516063(Top 57%)5256(Top 43%)5256(Top 290%)
Half13.11 mi0.68 mi16012-1365158-815158-8117964(Top 63%)6281(Top 51%)6281(Top 346%)
25K15.53 mi2.42 mi15849+1635084+745084+7415104(Top 53%)4793(Top 39%)4793(Top 264%)
30K18.64 mi3.11 mi15637+2125013+715013+7114919(Top 53%)4860(Top 40%)4860(Top 268%)
20M20.00 mi1.36 mi15712-755103-905103-9017145(Top 60%)6216(Top 51%)6216(Top 343%)
21M21.00 mi1.00 mi15568+1445056+475056+4714134(Top 50%)4707(Top 38%)4707(Top 260%)
35K21.75 mi0.75 mi15611-435099-435099-4316903(Top 60%)6273(Top 51%)6273(Top 346%)
23M23.00 mi1.25 mi15657-465166-675166-6717083(Top 60%)6493(Top 53%)6493(Top 358%)
24M24.00 mi1.00 mi15699-425207-415207-4117376(Top 61%)6689(Top 55%)6689(Top 369%)
40K24.85 mi0.85 mi15726-275245-385245-3816892(Top 59%)6523(Top 53%)6523(Top 360%)
25.2M25.20 mi0.35 mi15699+275249-45249-414494(Top 51%)5283(Top 43%)5283(Top 291%)
Finish26.22 mi1.02 mi15657+425244+55244+514472(Top 51%)5195(Top 42%)5195(Top 287%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21stories
+97ft-345ft

Overall

16394

Females

5375

F45-49

5375

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

16392

Females

5362

F45-49

5362

10K→15K

6.2 - 9.3 mi

Top 58%
×3stories
+67ft-78ft

Overall

16394

Females

5375

F45-49

5375

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

16063

Females

5256

F45-49

5256

20K→Half

12.4 - 13.1 mi

Top 63%
×2stories
+19ft-37ft

Overall

17964

Females

6281

F45-49

6281

Half→25K

13.1 - 15.5 mi

Top 53%
×4stories
+66ft-88ft

Overall

15104

Females

4793

F45-49

4793

25K→30K

15.5 - 18.6 mi

Top 53%
×9stories
+181ft-148ft

Overall

14919

Females

4860

F45-49

4860

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

17145

Females

6216

F45-49

6216

20M→21M

20.0 - 21.0 mi

Top 50%
×8stories
+106ft-24ft

Overall

14134

Females

4707

F45-49

4707

21M→35K

21.0 - 21.8 mi

Top 60%
×7stories
+17ft-86ft

Overall

16903

Females

6273

F45-49

6273

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

17083

Females

6493

F45-49

6493

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

17376

Females

6689

F45-49

6689

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16892

Females

6523

F45-49

6523

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14494

Females

5283

F45-49

5283

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14472

Females

5195

F45-49

5195

Passing Analysis

Category:
Athletes Passed
1650
Passed By
2624
Net Change
-974
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14683
5K → 10K78941-863#14683#15546
10K → 15K118413-295#15546#15841
15K → 20K182217-35#15841#15876
20K → Half11147-136#15876#16012
Half → 25K24784+163#16012#15849
25K → 30K333121+212#15849#15637
30K → 20M105180-75#15637#15712
20M → 21M19046+144#15712#15568
21M → 35K4588-43#15568#15611
35K → 23M92138-46#15611#15657
23M → 24M5294-42#15657#15699
24M → 40K7299-27#15699#15726
40K → 25.2M4114+27#15726#15699
25.2M → Finish8442+42#15699#15657
TOTALS16502624-974
📊

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