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BOSTON MARATHON 2025

Emma Bailey

Bib: 17437•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 38%
Gender (Female)
#0 / 12228
Top 22%
Division (F18-39)
#0 / 5469
Top 38%
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
7:20/mi
22:47
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
45:49
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:08:56
↑ 67↓ 78
20K· 12.43 mi
7:32/mi
1:32:19
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:37:26
↑ 19↓ 370.5%
25K· 15.53 mi
7:40/mi
1:56:02
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:21:02
↑ 181↓ 1480.2%
20M
8:08/mi
2:32:05
↑ 64↓ 500.2%
21M
8:46/mi
2:40:51
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:46:44
↑ 17↓ 861.7%
23M
8:14/mi
2:57:02
↑ 23↓ 630.6%
24M
7:51/mi
3:04:53
↓ 821.3%
40K· 24.85 mi
8:08/mi
3:11:50
↓ 200.3%
25.2M
8:36/mi
3:14:48
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
3:22:25
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:26
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:44:59
Pace8:01 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:0922:477:2022:47
7:20
-
10K
6.21 mi11:36:1145:497:2223:02
7:25
+0:05
15K
9.32 mi11:59:181:08:567:2423:07
7:26
+0:01
20K
12.43 mi12:22:411:32:197:2623:23
7:32
+0:06
Half
13.11 mi12:27:481:37:267:265:07
7:30
-0:02
25K
15.53 mi12:46:241:56:027:2818:36
7:40
+0:10
30K
18.64 mi13:11:242:21:027:3425:00
8:03
+0:23
20M
20.00 mi13:22:272:32:057:3611:03
8:08
+0:05
21M
21.00 mi13:31:132:40:517:408:46
8:46
+0:38
35K
21.75 mi13:37:062:46:447:405:53
7:52
-0:54
23M
23.00 mi13:47:242:57:027:4210:18
8:14
+0:22
24M
24.00 mi13:55:153:04:537:427:51
7:51
-0:23
40K
24.85 mi14:02:123:11:507:436:57
8:08
+0:17
25.2M
25.20 mi14:05:103:14:487:442:58
8:36
+0:28
Finish
26.22 mi14:12:473:22:257:447:37
7:28
-1:08

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

7:20 /mi

Average Pace

7:44 /mi

Slowest Pace

8:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:23

80% of race

Time at Steady Pace

31:16

15% of race

Time at Slower Pace

8:46

4% of race

Average Pace: 7:43 /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 mi11:13:0922:477:2022:47
7:20
#10722
10K
6.21 mi11:36:1145:497:2223:02
7:25
#10996
15K
9.32 mi11:59:181:08:567:2423:07
7:26
#11030
20K
12.43 mi12:22:411:32:197:2623:23
7:32
#11005
Half
13.11 mi12:27:481:37:267:265:07
7:30
#11056
25K
15.53 mi12:46:241:56:027:2818:36
7:40
#11076
30K
18.64 mi13:11:242:21:027:3425:00
8:03
#11166
20M
20.00 mi13:22:272:32:057:3611:03
8:08
#11125
21M
21.00 mi13:31:132:40:517:408:46
8:46
#11147
35K
21.75 mi13:37:062:46:447:405:53
7:52
#11135
23M
23.00 mi13:47:242:57:027:4210:18
8:14
#11106
24M
24.00 mi13:55:153:04:537:427:51
7:51
#11025
40K
24.85 mi14:02:123:11:507:436:57
8:08
#11006
25.2M
25.20 mi14:05:103:14:487:442:58
8:36
#10954
Finish
26.22 mi14:12:473:22:257:447:37
7:28
#10867
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi107222148214811266(Top 40%)2515(Top 21%)2515(Top 46%)
10K6.21 mi3.10 mi10996-2742302-1542302-15411323(Top 40%)2474(Top 20%)2474(Top 45%)
15K9.32 mi3.11 mi11030-342336-342336-3411266(Top 40%)2515(Top 21%)2515(Top 46%)
20K12.43 mi3.11 mi11005+252341-52341-511007(Top 39%)2479(Top 20%)2479(Top 45%)
Half13.11 mi0.68 mi11056-512373-322373-3211757(Top 41%)2796(Top 23%)2796(Top 51%)
25K15.53 mi2.42 mi11076-202429-562429-5611332(Top 40%)2760(Top 23%)2760(Top 50%)
30K18.64 mi3.11 mi11166-902553-1242553-12411726(Top 41%)3150(Top 26%)3150(Top 58%)
20M20.00 mi1.36 mi11125+412567-142567-1411353(Top 40%)3107(Top 25%)3107(Top 57%)
21M21.00 mi1.00 mi11147-222629-622629-6212103(Top 43%)3648(Top 30%)3648(Top 67%)
35K21.75 mi0.75 mi11135+122642-132642-1311316(Top 40%)3268(Top 27%)3268(Top 60%)
23M23.00 mi1.25 mi11106+292668-262668-2611543(Top 41%)3498(Top 29%)3498(Top 64%)
24M24.00 mi1.00 mi11025+812670-22670-210213(Top 36%)2908(Top 24%)2908(Top 53%)
40K24.85 mi0.85 mi11006+192697-272697-2711104(Top 39%)3449(Top 28%)3449(Top 63%)
25.2M25.20 mi0.35 mi10954+522684+132684+139495(Top 33%)2772(Top 23%)2772(Top 51%)
Finish26.22 mi1.02 mi10867+872670+142670+149042(Top 32%)2560(Top 21%)2560(Top 47%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

11266

Females

2515

F18-39

2515

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

11323

Females

2474

F18-39

2474

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

11266

Females

2515

F18-39

2515

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11007

Females

2479

F18-39

2479

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11757

Females

2796

F18-39

2796

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11332

Females

2760

F18-39

2760

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11726

Females

3150

F18-39

3150

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11353

Females

3107

F18-39

3107

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

12103

Females

3648

F18-39

3648

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11316

Females

3268

F18-39

3268

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11543

Females

3498

F18-39

3498

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

10213

Females

2908

F18-39

2908

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11104

Females

3449

F18-39

3449

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9495

Females

2772

F18-39

2772

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

9042

Females

2560

F18-39

2560

Passing Analysis

Category:
Athletes Passed
1665
Passed By
1810
Net Change
-145
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10722
5K → 10K144418-274#10722#10996
10K → 15K160194-34#10996#11030
15K → 20K187162+25#11030#11005
20K → Half2475-51#11005#11056
Half → 25K163183-20#11056#11076
25K → 30K198288-90#11076#11166
30K → 20M13190+41#11166#11125
20M → 21M91113-22#11125#11147
21M → 35K6351+12#11147#11135
35K → 23M12293+29#11135#11106
23M → 24M12140+81#11106#11025
24M → 40K8566+19#11025#11006
40K → 25.2M6412+52#11006#10954
25.2M → Finish11225+87#10954#10867
TOTALS16651810-145
📊

Passing Visuals

Category:
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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