Boston Marathon logo
BOSTON MARATHON 2025

Elaine Koon

Bib: 10397•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 10%
Division (F18-39)
#0 / 5469
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:07
Rank: #6305
Start → 5K
21:07 | 6:48/mi
10K· 6.21 mi
42:08
Rank: #6120 (+185)
5K → 10K
21:01 | 6:46/mi
15K· 9.32 mi
1:03:01
Rank: #5830 (+290)
10K → 15K
20:53 | 6:43/mi
20K· 12.43 mi
1:24:08
Rank: #5676 (+154)
15K → 20K
21:07 | 6:48/mi
Half· 13.11 mi
1:28:47
Rank: #5709 (-33)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:45:50
Rank: #5832 (-123)
Half → 25K
17:03 | 7:02/mi
30K· 18.64 mi
2:08:54
Rank: #6074 (-242)
25K → 30K
23:04 | 7:25/mi
20M
2:20:18
Rank: #6487 (-413)
30K → 20M
11:24 | 8:23/mi
21M
2:29:06
Rank: #6707 (-220)
20M → 21M
8:48 | 8:48/mi
35K· 21.75 mi
2:34:32
Rank: #6671 (+36)
21M → 35K
5:26 | 7:16/mi
23M
2:44:56
Rank: #6923 (-252)
35K → 23M
10:24 | 8:18/mi
24M
2:52:55
Rank: #7042 (-119)
23M → 24M
7:59 | 7:59/mi
40K· 24.85 mi
3:00:26
Rank: #7291 (-249)
24M → 40K
7:31 | 8:47/mi
25.2M
3:03:42
Rank: #7379 (-88)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:11:35
Rank: #7497 (-118)
25.2M → Finish
7:53 | 7:44/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
Time1:28:47
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:42:48
Pace7:51 /mi
📊Positive Split: 15.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4421:076:4821:07
6:48
-
10K
6.21 mi11:07:4542:086:4721:01
6:46
-0:02
15K
9.32 mi11:28:381:03:016:4620:53
6:43
-0:03
20K
12.43 mi11:49:451:24:086:4621:07
6:48
+0:05
Half
13.11 mi11:54:241:28:476:464:39
6:49
+0:01
25K
15.53 mi12:11:271:45:506:4917:03
7:02
+0:13
30K
18.64 mi12:34:312:08:546:5523:04
7:25
+0:23
20M
20.00 mi12:45:552:20:187:0111:24
8:23
+0:58
21M
21.00 mi12:54:432:29:067:068:48
8:48
+0:25
35K
21.75 mi13:00:092:34:327:065:26
7:16
-1:32
23M
23.00 mi13:10:332:44:567:1010:24
8:18
+1:02
24M
24.00 mi13:18:322:52:557:127:59
7:59
-0:19
40K
24.85 mi13:26:033:00:267:167:31
8:47
+0:48
25.2M
25.20 mi13:29:193:03:427:173:16
9:28
+0:41
Finish
26.22 mi13:37:123:11:357:197:53
7:44
-1:44

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

6:43 /mi

Average Pace

7:19 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:47

46% of race

Time at Steady Pace

53:26

28% of race

Time at Slower Pace

49:22

26% of race

Average Pace: 7:18 /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 mi10:46:4421:076:4821:07
6:48
#6305
10K
6.21 mi11:07:4542:086:4721:01
6:46
#6120
15K
9.32 mi11:28:381:03:016:4620:53
6:43
#5830
20K
12.43 mi11:49:451:24:086:4621:07
6:48
#5676
Half
13.11 mi11:54:241:28:476:464:39
6:49
#5709
25K
15.53 mi12:11:271:45:506:4917:03
7:02
#5832
30K
18.64 mi12:34:312:08:546:5523:04
7:25
#6074
20M
20.00 mi12:45:552:20:187:0111:24
8:23
#6487
21M
21.00 mi12:54:432:29:067:068:48
8:48
#6707
35K
21.75 mi13:00:092:34:327:065:26
7:16
#6671
23M
23.00 mi13:10:332:44:567:1010:24
8:18
#6923
24M
24.00 mi13:18:322:52:557:127:59
7:59
#7042
40K
24.85 mi13:26:033:00:267:167:31
8:47
#7291
25.2M
25.20 mi13:29:193:03:427:173:16
9:28
#7379
Finish
26.22 mi13:37:123:11:357:197:53
7:44
#7497
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi63055335335314(Top 19%)401(Top 3%)401(Top 7%)
10K6.21 mi3.10 mi6120+185500+33500+336023(Top 21%)507(Top 4%)507(Top 9%)
15K9.32 mi3.11 mi5830+290465+35465+355314(Top 19%)401(Top 3%)401(Top 7%)
20K12.43 mi3.11 mi5676+154451+14451+145289(Top 19%)421(Top 3%)421(Top 8%)
Half13.11 mi0.68 mi5709-33457-6457-66374(Top 22%)636(Top 5%)636(Top 12%)
25K15.53 mi2.42 mi5832-123493-36493-366546(Top 23%)736(Top 6%)736(Top 13%)
30K18.64 mi3.11 mi6074-242574-81574-817213(Top 25%)1100(Top 9%)1100(Top 20%)
20M20.00 mi1.36 mi6487-413671-97671-9713073(Top 46%)4008(Top 33%)4008(Top 73%)
21M21.00 mi1.00 mi6707-220750-79750-7912293(Top 43%)3744(Top 31%)3744(Top 68%)
35K21.75 mi0.75 mi6671+36757-7757-77017(Top 25%)1290(Top 11%)1290(Top 24%)
23M23.00 mi1.25 mi6923-252860-103860-10312080(Top 43%)3773(Top 31%)3773(Top 69%)
24M24.00 mi1.00 mi7042-119933-73933-7311119(Top 39%)3351(Top 27%)3351(Top 61%)
40K24.85 mi0.85 mi7291-2491046-1131046-11315143(Top 53%)5587(Top 46%)5587(Top 102%)
25.2M25.20 mi0.35 mi7379-881094-481094-4814442(Top 51%)5231(Top 43%)5231(Top 96%)
Finish26.22 mi1.02 mi7497-1181172-781172-7810966(Top 39%)3434(Top 28%)3434(Top 63%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5314

Females

401

F18-39

401

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

6023

Females

507

F18-39

507

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5314

Females

401

F18-39

401

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5289

Females

421

F18-39

421

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6374

Females

636

F18-39

636

Half→25K

13.1 - 15.5 mi

Top 23%
×4stories
+66ft-88ft

Overall

6546

Females

736

F18-39

736

25K→30K

15.5 - 18.6 mi

Top 25%
×9stories
+181ft-148ft

Overall

7213

Females

1100

F18-39

1100

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

13073

Females

4008

F18-39

4008

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

12293

Females

3744

F18-39

3744

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

7017

Females

1290

F18-39

1290

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

12080

Females

3773

F18-39

3773

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

11119

Females

3351

F18-39

3351

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15143

Females

5587

F18-39

5587

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14442

Females

5231

F18-39

5231

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

10966

Females

3434

F18-39

3434

Passing Analysis

Category:
Athletes Passed
1279
Passed By
2471
Net Change
-1192
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6305
5K → 10K291106+185#6305#6120
10K → 15K31727+290#6120#5830
15K → 20K21056+154#5830#5676
20K → Half1245-33#5676#5709
Half → 25K101224-123#5709#5832
25K → 30K104346-242#5832#6074
30K → 20M22435-413#6074#6487
20M → 21M18238-220#6487#6707
21M → 35K6428+36#6707#6671
35K → 23M42294-252#6671#6923
23M → 24M36155-119#6923#7042
24M → 40K18267-249#7042#7291
40K → 25.2M896-88#7291#7379
25.2M → Finish36154-118#7379#7497
TOTALS12792471-1192
📊

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