Boston Marathon logo
BOSTON MARATHON 2025

Erin Czuprynski

Bib: 10809•F

IL

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 23%
Gender (Female)
#0 / 12228
Top 7%
Division (F18-39)
#0 / 5469
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:01/mi
21:47
↑ 97↓ 3451.5%
10K· 6.21 mi
6:52/mi
43:07
↑ 79↓ 1380.4%
15K· 9.32 mi
6:56/mi
1:04:38
↑ 67↓ 78
20K· 12.43 mi
7:12/mi
1:27:00
↑ 106↓ 860.1%
Half· 13.11 mi
6:53/mi
1:31:42
↑ 19↓ 370.5%
25K· 15.53 mi
7:16/mi
1:49:19
↑ 66↓ 880.2%
30K· 18.64 mi
7:20/mi
2:12:06
↑ 181↓ 1480.2%
20M
7:38/mi
2:22:28
↑ 64↓ 500.2%
21M
8:02/mi
2:30:30
↑ 106↓ 241.6%
35K· 21.75 mi
6:56/mi
2:35:41
↑ 17↓ 861.7%
23M
7:22/mi
2:44:54
↑ 23↓ 630.6%
24M
7:02/mi
2:51:56
↓ 821.3%
40K· 24.85 mi
7:07/mi
2:58:01
↓ 200.3%
25.2M
8:07/mi
3:00:49
↑ 13↓ 160.2%
Finish· 26.22 mi
7:01/mi
3:07:58
↑ 22↓ 21

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
Time1:31:42
Pace7:00 /mi
2nd Half
Distance13.11 mi
Time1:36:16
Pace7:21 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:5121:477:0121:47
7:01
-
10K
6.21 mi11:10:1143:076:5621:20
6:52
-0:09
15K
9.32 mi11:31:421:04:386:5621:31
6:56
+0:04
20K
12.43 mi11:54:041:27:007:0022:22
7:12
+0:16
Half
13.11 mi11:58:461:31:427:004:42
6:53
-0:19
25K
15.53 mi12:16:231:49:197:0217:37
7:16
+0:23
30K
18.64 mi12:39:102:12:067:0522:47
7:20
+0:04
20M
20.00 mi12:49:322:22:287:0710:22
7:38
+0:18
21M
21.00 mi12:57:342:30:307:108:02
8:02
+0:24
35K
21.75 mi13:02:452:35:417:105:11
6:56
-1:06
23M
23.00 mi13:11:582:44:547:109:13
7:22
+0:26
24M
24.00 mi13:19:002:51:567:107:02
7:02
-0:20
40K
24.85 mi13:25:052:58:017:106:05
7:07
+0:05
25.2M
25.20 mi13:27:533:00:497:112:48
8:07
+1:00
Finish
26.22 mi13:35:023:07:587:107:09
7:01
-1:06

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

6:52 /mi

Average Pace

7:10 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:46

89% of race

Time at Steady Pace

18:24

10% of race

Time at Slower Pace

2:48

1% of race

Average Pace: 7:10 /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 mi10:48:5121:477:0121:47
7:01
#7926
10K
6.21 mi11:10:1143:076:5621:20
6:52
#7435
15K
9.32 mi11:31:421:04:386:5621:31
6:56
#7341
20K
12.43 mi11:54:041:27:007:0022:22
7:12
#7510
Half
13.11 mi11:58:461:31:427:004:42
6:53
#7465
25K
15.53 mi12:16:231:49:197:0217:37
7:16
#7504
30K
18.64 mi12:39:102:12:067:0522:47
7:20
#7258
20M
20.00 mi12:49:322:22:287:0710:22
7:38
#7215
21M
21.00 mi12:57:342:30:307:108:02
8:02
#7180
35K
21.75 mi13:02:452:35:417:105:11
6:56
#7060
23M
23.00 mi13:11:582:44:547:109:13
7:22
#6910
24M
24.00 mi13:19:002:51:567:107:02
7:02
#6728
40K
24.85 mi13:25:052:58:017:106:05
7:07
#6582
25.2M
25.20 mi13:27:533:00:497:112:48
8:07
#6558
Finish
26.22 mi13:35:023:07:587:107:09
7:01
#6485
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi79269559557137(Top 25%)769(Top 6%)769(Top 14%)
10K6.21 mi3.10 mi7435+491810+145810+1457013(Top 25%)715(Top 6%)715(Top 13%)
15K9.32 mi3.11 mi7341+94790+20790+207137(Top 25%)769(Top 6%)769(Top 14%)
20K12.43 mi3.11 mi7510-169851-61851-618211(Top 29%)1186(Top 10%)1186(Top 22%)
Half13.11 mi0.68 mi7465+45841+10841+106889(Top 24%)747(Top 6%)747(Top 14%)
25K15.53 mi2.42 mi7504-39873-32873-328109(Top 29%)1253(Top 10%)1253(Top 23%)
30K18.64 mi3.11 mi7258+246850+23850+236658(Top 23%)887(Top 7%)887(Top 16%)
20M20.00 mi1.36 mi7215+43865-15865-157903(Top 28%)1495(Top 12%)1495(Top 27%)
21M21.00 mi1.00 mi7180+35889-24889-247542(Top 27%)1522(Top 12%)1522(Top 28%)
35K21.75 mi0.75 mi7060+120870+19870+194979(Top 18%)610(Top 5%)610(Top 11%)
23M23.00 mi1.25 mi6910+150854+16854+165831(Top 21%)945(Top 8%)945(Top 17%)
24M24.00 mi1.00 mi6728+182830+24830+244853(Top 17%)686(Top 6%)686(Top 13%)
40K24.85 mi0.85 mi6582+146813+17813+174608(Top 16%)672(Top 5%)672(Top 12%)
25.2M25.20 mi0.35 mi6558+24819-6819-66633(Top 23%)1461(Top 12%)1461(Top 27%)
Finish26.22 mi1.02 mi6485+73828-9828-95856(Top 21%)1192(Top 10%)1192(Top 22%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

7137

Females

769

F18-39

769

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7013

Females

715

F18-39

715

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

7137

Females

769

F18-39

769

15K→20K

9.3 - 12.4 mi

Top 29%
×5story building
+106ft-86ft

Overall

8211

Females

1186

F18-39

1186

20K→Half

12.4 - 13.1 mi

Top 24%
×2story building
+19ft-37ft

Overall

6889

Females

747

F18-39

747

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8109

Females

1253

F18-39

1253

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6658

Females

887

F18-39

887

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

7903

Females

1495

F18-39

1495

20M→21M

20.0 - 21.0 mi

Top 27%
×8story building
+106ft-24ft

Overall

7542

Females

1522

F18-39

1522

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

4979

Females

610

F18-39

610

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

5831

Females

945

F18-39

945

23M→24M

23.0 - 24.0 mi

Top 17%
×6story building
+12ft-82ft

Overall

4853

Females

686

F18-39

686

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4608

Females

672

F18-39

672

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6633

Females

1461

F18-39

1461

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5856

Females

1192

F18-39

1192

Passing Analysis

Category:
Athletes Passed
2261
Passed By
820
Net Change
+1441
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7926
5K → 10K53241+491#7926#7435
10K → 15K19096+94#7435#7341
15K → 20K85254-169#7341#7510
20K → Half5510+45#7510#7465
Half → 25K94133-39#7465#7504
25K → 30K31165+246#7504#7258
30K → 20M10966+43#7258#7215
20M → 21M10873+35#7215#7180
21M → 35K1200+120#7180#7060
35K → 23M17222+150#7060#6910
23M → 24M1864+182#6910#6728
24M → 40K1504+146#6728#6582
40K → 25.2M4117+24#6582#6558
25.2M → Finish10835+73#6558#6485
TOTALS2261820+1441
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing