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BOSTON MARATHON 2025

Emily Bulczynski

Bib: 17859•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 41%
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
24:11
Rank: #14682
Start → 5K
24:11 | 7:47/mi
10K· 6.21 mi
48:20
Rank: #14580 (+102)
5K → 10K
24:09 | 7:46/mi
15K· 9.32 mi
1:12:28
Rank: #14420 (+160)
10K → 15K
24:08 | 7:46/mi
20K· 12.43 mi
1:36:40
Rank: #14078 (+342)
15K → 20K
24:12 | 7:47/mi
Half· 13.11 mi
1:41:54
Rank: #14023 (+55)
20K → Half
5:14 | 7:40/mi
25K· 15.53 mi
2:01:10
Rank: #13896 (+127)
Half → 25K
19:16 | 7:57/mi
30K· 18.64 mi
2:28:33
Rank: #14440 (-544)
25K → 30K
27:23 | 8:49/mi
20M
2:40:19
Rank: #14459 (-19)
30K → 20M
11:46 | 8:40/mi
21M
2:49:49
Rank: #14578 (-119)
20M → 21M
9:30 | 9:30/mi
35K· 21.75 mi
2:56:35
Rank: #14712 (-134)
21M → 35K
6:46 | 9:03/mi
23M
3:09:36
Rank: #15339 (-627)
35K → 23M
13:01 | 10:24/mi
24M
3:18:19
Rank: #15339
23M → 24M
8:43 | 8:43/mi
40K· 24.85 mi
3:25:55
Rank: #15339
24M → 40K
7:36 | 8:53/mi
25.2M
3:29:07
Rank: #15301 (+38)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:37:04
Rank: #15141 (+160)
25.2M → Finish
7:57 | 7:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:54
Pace7:46 /mi
2nd Half
Distance13.11 mi
Time1:55:10
Pace8:47 /mi
📊Positive Split: 13.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2624:117:4724:11
7:47
-
10K
6.21 mi11:39:3548:207:4724:09
7:46
-0:01
15K
9.32 mi12:03:431:12:287:4624:08
7:46
0:00
20K
12.43 mi12:27:551:36:407:4724:12
7:47
+0:01
Half
13.11 mi12:33:091:41:547:465:14
7:40
-0:07
25K
15.53 mi12:52:252:01:107:4819:16
7:57
+0:17
30K
18.64 mi13:19:482:28:337:5827:23
8:49
+0:52
20M
20.00 mi13:31:342:40:198:0111:46
8:40
-0:09
21M
21.00 mi13:41:042:49:498:059:30
9:30
+0:50
35K
21.75 mi13:47:502:56:358:076:46
9:03
-0:27
23M
23.00 mi14:00:513:09:368:1513:01
10:24
+1:21
24M
24.00 mi14:09:343:18:198:168:43
8:43
-1:41
40K
24.85 mi14:17:103:25:558:177:36
8:53
+0:10
25.2M
25.20 mi14:20:223:29:078:183:12
9:17
+0:24
Finish
26.22 mi14:28:193:37:048:177:57
7:48
-1:29

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

7:40 /mi

Average Pace

8:17 /mi

Slowest Pace

10:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:07

59% of race

Time at Steady Pace

1:02:14

29% of race

Time at Slower Pace

25:43

12% of race

Average Pace: 8:17 /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 mi11:15:2624:117:4724:11
7:47
#14682
10K
6.21 mi11:39:3548:207:4724:09
7:46
#14580
15K
9.32 mi12:03:431:12:287:4624:08
7:46
#14420
20K
12.43 mi12:27:551:36:407:4724:12
7:47
#14078
Half
13.11 mi12:33:091:41:547:465:14
7:40
#14023
25K
15.53 mi12:52:252:01:107:4819:16
7:57
#13896
30K
18.64 mi13:19:482:28:337:5827:23
8:49
#14440
20M
20.00 mi13:31:342:40:198:0111:46
8:40
#14459
21M
21.00 mi13:41:042:49:498:059:30
9:30
#14578
35K
21.75 mi13:47:502:56:358:076:46
9:03
#14712
23M
23.00 mi14:00:513:09:368:1513:01
10:24
#15339
24M
24.00 mi14:09:343:18:198:168:43
8:43
#15339
40K
24.85 mi14:17:103:25:558:177:36
8:53
#15339
25.2M
25.20 mi14:20:223:29:078:183:12
9:17
#15301
Finish
26.22 mi14:28:193:37:048:177:57
7:48
#15141
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi146824338433814115(Top 50%)4087(Top 33%)4087(Top 75%)
10K6.21 mi3.10 mi14580+1024285+534285+5314582(Top 51%)4306(Top 35%)4306(Top 79%)
15K9.32 mi3.11 mi14420+1604213+724213+7214115(Top 50%)4087(Top 33%)4087(Top 75%)
20K12.43 mi3.11 mi14078+3424050+1634050+16313213(Top 47%)3666(Top 30%)3666(Top 67%)
Half13.11 mi0.68 mi14023+554015+354015+3513255(Top 47%)3655(Top 30%)3655(Top 67%)
25K15.53 mi2.42 mi13896+1273987+283987+2813511(Top 48%)3951(Top 32%)3951(Top 72%)
30K18.64 mi3.11 mi14440-5444358-3714358-37116681(Top 59%)5846(Top 48%)5846(Top 107%)
20M20.00 mi1.36 mi14459-194398-404398-4014821(Top 52%)4949(Top 40%)4949(Top 90%)
21M21.00 mi1.00 mi14578-1194490-924490-9216086(Top 57%)5745(Top 47%)5745(Top 105%)
35K21.75 mi0.75 mi14712-1344576-864576-8618450(Top 65%)7150(Top 58%)7150(Top 131%)
23M23.00 mi1.25 mi15339-6274976-4004976-40021722(Top 76%)8926(Top 73%)8926(Top 163%)
24M24.00 mi1.00 mi153395003-275003-2715844(Top 56%)5834(Top 48%)5834(Top 107%)
40K24.85 mi0.85 mi153395039-365039-3615713(Top 55%)5897(Top 48%)5897(Top 108%)
25.2M25.20 mi0.35 mi15301+385025+145025+1413416(Top 47%)4725(Top 39%)4725(Top 86%)
Finish26.22 mi1.02 mi15141+1604953+724953+7211491(Top 40%)3708(Top 30%)3708(Top 68%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14115

Females

4087

F18-39

4087

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14582

Females

4306

F18-39

4306

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14115

Females

4087

F18-39

4087

15K→20K

9.3 - 12.4 mi

Top 47%
×5stories
+106ft-86ft

Overall

13213

Females

3666

F18-39

3666

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13255

Females

3655

F18-39

3655

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13511

Females

3951

F18-39

3951

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

16681

Females

5846

F18-39

5846

30K→20M

18.6 - 20.0 mi

Top 52%
×5stories
+64ft-50ft

Overall

14821

Females

4949

F18-39

4949

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16086

Females

5745

F18-39

5745

21M→35K

21.0 - 21.8 mi

Top 65%
×7stories
+17ft-86ft

Overall

18450

Females

7150

F18-39

7150

35K→23M

21.8 - 23.0 mi

Top 76%
×5stories
+23ft-63ft

Overall

21722

Females

8926

F18-39

8926

23M→24M

23.0 - 24.0 mi

Top 56%
×6stories
+12ft-82ft

Overall

15844

Females

5834

F18-39

5834

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15713

Females

5897

F18-39

5897

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13416

Females

4725

F18-39

4725

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

11491

Females

3708

F18-39

3708

Passing Analysis

Category:
Athletes Passed
2065
Passed By
2524
Net Change
-459
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14682
5K → 10K353251+102#14682#14580
10K → 15K275115+160#14580#14420
15K → 20K39149+342#14420#14078
20K → Half7116+55#14078#14023
Half → 25K22699+127#14023#13896
25K → 30K119663-544#13896#14440
30K → 20M124143-19#14440#14459
20M → 21M79198-119#14459#14578
21M → 35K36170-134#14578#14712
35K → 23M25652-627#14712#15339
23M → 24M69690#15339#15339
24M → 40K78780#15339#15339
40K → 25.2M5012+38#15339#15301
25.2M → Finish1699+160#15301#15141
TOTALS20652524-459
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing