Boston Marathon logo
BOSTON MARATHON 2025

Emily Stanzyk

Bib: 13899•F

IA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:38
Rank: #13204
Start → 5K
23:38 | 7:36/mi
10K· 6.21 mi
47:55
Rank: #14012 (-808)
5K → 10K
24:17 | 7:49/mi
15K· 9.32 mi
1:12:22
Rank: #14338 (-326)
10K → 15K
24:27 | 7:52/mi
20K· 12.43 mi
1:36:53
Rank: #14220 (+118)
15K → 20K
24:31 | 7:53/mi
Half· 13.11 mi
1:42:12
Rank: #14217 (+3)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:01:29
Rank: #14055 (+162)
Half → 25K
19:17 | 7:57/mi
30K· 18.64 mi
2:27:08
Rank: #13822 (+233)
25K → 30K
25:39 | 8:15/mi
20M
2:39:17
Rank: #14025 (-203)
30K → 20M
12:09 | 8:56/mi
21M
2:49:22
Rank: #14388 (-363)
20M → 21M
10:05 | 10:05/mi
35K· 21.75 mi
2:56:37
Rank: #14726 (-338)
21M → 35K
7:15 | 9:41/mi
23M
3:09:01
Rank: #15165 (-439)
35K → 23M
12:24 | 9:54/mi
24M
3:18:29
Rank: #15393 (-228)
23M → 24M
9:28 | 9:28/mi
40K· 24.85 mi
3:26:25
Rank: #15469 (-76)
24M → 40K
7:56 | 9:17/mi
25.2M
3:29:50
Rank: #15469
40K → 25.2M
3:25 | 9:54/mi
Finish· 26.22 mi
3:38:36
Rank: #15519 (-50)
25.2M → Finish
8:46 | 8:36/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
Time1:42:12
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:56:24
Pace8:53 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2523:387:3623:38
7:36
-
10K
6.21 mi11:16:4247:557:4324:17
7:49
+0:13
15K
9.32 mi11:41:091:12:227:4624:27
7:52
+0:03
20K
12.43 mi12:05:401:36:537:4824:31
7:53
+0:01
Half
13.11 mi12:10:591:42:127:485:19
7:48
-0:05
25K
15.53 mi12:30:162:01:297:4919:17
7:57
+0:09
30K
18.64 mi12:55:552:27:087:5425:39
8:15
+0:18
20M
20.00 mi13:08:042:39:177:5812:09
8:56
+0:41
21M
21.00 mi13:18:092:49:228:0410:05
10:05
+1:09
35K
21.75 mi13:25:242:56:378:077:15
9:41
-0:24
23M
23.00 mi13:37:483:09:018:1312:24
9:54
+0:13
24M
24.00 mi13:47:163:18:298:169:28
9:28
-0:26
40K
24.85 mi13:55:123:26:258:187:56
9:17
-0:11
25.2M
25.20 mi13:58:373:29:508:203:25
9:54
+0:37
Finish
26.22 mi14:07:233:38:368:218:46
8:36
-1:18

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

7:36 /mi

Average Pace

8:21 /mi

Slowest Pace

10:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:29

56% of race

Time at Steady Pace

46:34

21% of race

Time at Slower Pace

50:33

23% of race

Average Pace: 8:20 /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 mi10:52:2523:387:3623:38
7:36
#13204
10K
6.21 mi11:16:4247:557:4324:17
7:49
#14012
15K
9.32 mi11:41:091:12:227:4624:27
7:52
#14338
20K
12.43 mi12:05:401:36:537:4824:31
7:53
#14220
Half
13.11 mi12:10:591:42:127:485:19
7:48
#14217
25K
15.53 mi12:30:162:01:297:4919:17
7:57
#14055
30K
18.64 mi12:55:552:27:087:5425:39
8:15
#13822
20M
20.00 mi13:08:042:39:177:5812:09
8:56
#14025
21M
21.00 mi13:18:092:49:228:0410:05
10:05
#14388
35K
21.75 mi13:25:242:56:378:077:15
9:41
#14726
23M
23.00 mi13:37:483:09:018:1312:24
9:54
#15165
24M
24.00 mi13:47:163:18:298:169:28
9:28
#15393
40K
24.85 mi13:55:123:26:258:187:56
9:17
#15469
25.2M
25.20 mi13:58:373:29:508:203:25
9:54
#15469
Finish
26.22 mi14:07:233:38:368:218:46
8:36
#15519
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi132043441344115002(Top 53%)4582(Top 37%)4582(Top 84%)
10K6.21 mi3.10 mi14012-8083951-5103951-51014988(Top 53%)4533(Top 37%)4533(Top 83%)
15K9.32 mi3.11 mi14338-3264163-2124163-21215002(Top 53%)4582(Top 37%)4582(Top 84%)
20K12.43 mi3.11 mi14220+1184133+304133+3014026(Top 49%)4114(Top 34%)4114(Top 75%)
Half13.11 mi0.68 mi14217+34134-14134-114302(Top 50%)4253(Top 35%)4253(Top 78%)
25K15.53 mi2.42 mi14055+1624080+544080+5413561(Top 48%)3983(Top 33%)3983(Top 73%)
30K18.64 mi3.11 mi13822+2334010+704010+7013221(Top 47%)3959(Top 32%)3959(Top 72%)
20M20.00 mi1.36 mi14025-2034152-1424152-14216483(Top 58%)5864(Top 48%)5864(Top 107%)
21M21.00 mi1.00 mi14388-3634376-2244376-22418610(Top 66%)7123(Top 58%)7123(Top 130%)
35K21.75 mi0.75 mi14726-3384587-2114587-21120983(Top 74%)8487(Top 69%)8487(Top 155%)
23M23.00 mi1.25 mi15165-4394866-2794866-27920172(Top 71%)8133(Top 67%)8133(Top 149%)
24M24.00 mi1.00 mi15393-2285038-1725038-17219509(Top 69%)7823(Top 64%)7823(Top 143%)
40K24.85 mi0.85 mi15469-765112-745112-7417753(Top 63%)6995(Top 57%)6995(Top 128%)
25.2M25.20 mi0.35 mi154695121-95121-916616(Top 58%)6384(Top 52%)6384(Top 117%)
Finish26.22 mi1.02 mi15519-505164-435164-4316865(Top 59%)6487(Top 53%)6487(Top 119%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21stories
+97ft-345ft

Overall

15002

Females

4582

F18-39

4582

5K→10K

3.1 - 6.2 mi

Top 53%
×5stories
+79ft-138ft

Overall

14988

Females

4533

F18-39

4533

10K→15K

6.2 - 9.3 mi

Top 53%
×3stories
+67ft-78ft

Overall

15002

Females

4582

F18-39

4582

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

14026

Females

4114

F18-39

4114

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

14302

Females

4253

F18-39

4253

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13561

Females

3983

F18-39

3983

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13221

Females

3959

F18-39

3959

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16483

Females

5864

F18-39

5864

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

18610

Females

7123

F18-39

7123

21M→35K

21.0 - 21.8 mi

Top 74%
×7stories
+17ft-86ft

Overall

20983

Females

8487

F18-39

8487

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

20172

Females

8133

F18-39

8133

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19509

Females

7823

F18-39

7823

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17753

Females

6995

F18-39

6995

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16616

Females

6384

F18-39

6384

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

16865

Females

6487

F18-39

6487

Passing Analysis

Category:
Athletes Passed
1402
Passed By
3717
Net Change
-2315
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13204
5K → 10K77885-808#13204#14012
10K → 15K106432-326#14012#14338
15K → 20K270152+118#14338#14220
20K → Half3330+3#14220#14217
Half → 25K24280+162#14217#14055
25K → 30K366133+233#14055#13822
30K → 20M62265-203#13822#14025
20M → 21M45408-363#14025#14388
21M → 35K14352-338#14388#14726
35K → 23M33472-439#14726#15165
23M → 24M30258-228#15165#15393
24M → 40K49125-76#15393#15469
40K → 25.2M27270#15469#15469
25.2M → Finish4898-50#15469#15519
TOTALS14023717-2315
📊

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