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BOSTON MARATHON 2025

Emily Sarazin

Bib: 31726•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
10:37/mi
32:58
↑ 97↓ 3451.5%
10K· 6.21 mi
10:25/mi
1:05:20
↑ 79↓ 1380.4%
15K· 9.32 mi
10:18/mi
1:37:20
↑ 67↓ 78
20K· 12.43 mi
10:20/mi
2:09:27
↑ 106↓ 860.1%
Half· 13.11 mi
10:02/mi
2:16:18
↑ 19↓ 370.5%
25K· 15.53 mi
10:22/mi
2:41:27
↑ 66↓ 880.2%
30K· 18.64 mi
10:36/mi
3:14:22
↑ 181↓ 1480.2%
20M
10:56/mi
3:29:13
↑ 64↓ 500.2%
21M
11:58/mi
3:41:11
↑ 106↓ 241.6%
35K· 21.75 mi
11:06/mi
3:49:29
↑ 17↓ 861.7%
23M
11:37/mi
4:04:02
↑ 23↓ 630.6%
24M
11:36/mi
4:15:38
↓ 821.3%
40K· 24.85 mi
11:44/mi
4:25:40
↓ 200.3%
25.2M
13:09/mi
4:30:12
↑ 13↓ 160.2%
Finish· 26.22 mi
11:05/mi
4:41:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:16:18
Pace10:24 /mi
2nd Half
Distance13.11 mi
Time2:25:12
Pace11:05 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:4932:5810:3732:58
10:37
-
10K
6.21 mi12:29:111:05:2010:3132:22
10:25
-0:12
15K
9.32 mi13:01:111:37:2010:2732:00
10:18
-0:07
20K
12.43 mi13:33:182:09:2710:2532:07
10:20
+0:02
Half
13.11 mi13:40:092:16:1810:246:51
10:02
-0:18
25K
15.53 mi14:05:182:41:2710:2425:09
10:22
+0:20
30K
18.64 mi14:38:133:14:2210:2632:55
10:36
+0:14
20M
20.00 mi14:53:043:29:1310:2814:51
10:56
+0:20
21M
21.00 mi15:05:023:41:1110:3211:58
11:58
+1:02
35K
21.75 mi15:13:203:49:2910:338:18
11:06
-0:52
23M
23.00 mi15:27:534:04:0210:3714:33
11:37
+0:31
24M
24.00 mi15:39:294:15:3810:3911:36
11:36
-0:01
40K
24.85 mi15:49:314:25:4010:4110:02
11:44
+0:08
25.2M
25.20 mi15:54:034:30:1210:434:32
13:09
+1:25
Finish
26.22 mi16:05:214:41:3010:4511:18
11:05
-2:04

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

10:02 /mi

Average Pace

10:45 /mi

Slowest Pace

13:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:29

46% of race

Time at Steady Pace

1:40:20

36% of race

Time at Slower Pace

52:41

19% of race

Average Pace: 10:44 /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 mi11:56:4932:5810:3732:58
10:37
#26974
10K
6.21 mi12:29:111:05:2010:3132:22
10:25
#26508
15K
9.32 mi13:01:111:37:2010:2732:00
10:18
#26175
20K
12.43 mi13:33:182:09:2710:2532:07
10:20
#25830
Half
13.11 mi13:40:092:16:1810:246:51
10:02
#25783
25K
15.53 mi14:05:182:41:2710:2425:09
10:22
#25496
30K
18.64 mi14:38:133:14:2210:2632:55
10:36
#25089
20M
20.00 mi14:53:043:29:1310:2814:51
10:56
#25000
21M
21.00 mi15:05:023:41:1110:3211:58
11:58
#24930
35K
21.75 mi15:13:203:49:2910:338:18
11:06
#24912
23M
23.00 mi15:27:534:04:0210:3714:33
11:37
#24905
24M
24.00 mi15:39:294:15:3810:3911:36
11:36
#24919
40K
24.85 mi15:49:314:25:4010:4110:02
11:44
#24911
25.2M
25.20 mi15:54:034:30:1210:434:32
13:09
#24916
Finish
26.22 mi16:05:214:41:3010:4511:18
11:05
#24954
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26974113101131025588(Top 90%)10554(Top 86%)10554(Top 193%)
10K6.21 mi3.10 mi26508+46611057+25311057+25326122(Top 92%)10856(Top 89%)10856(Top 199%)
15K9.32 mi3.11 mi26175+33310878+17910878+17925588(Top 90%)10554(Top 86%)10554(Top 193%)
20K12.43 mi3.11 mi25830+34510693+18510693+18524895(Top 88%)10203(Top 83%)10203(Top 187%)
Half13.11 mi0.68 mi25783+4710661+3210661+3224872(Top 88%)10205(Top 83%)10205(Top 187%)
25K15.53 mi2.42 mi25496+28710519+14210519+14224113(Top 85%)9805(Top 80%)9805(Top 179%)
30K18.64 mi3.11 mi25089+40710328+19110328+19123151(Top 82%)9413(Top 77%)9413(Top 172%)
20M20.00 mi1.36 mi25000+8910294+3410294+3423438(Top 83%)9649(Top 79%)9649(Top 176%)
21M21.00 mi1.00 mi24930+7010265+2910265+2923522(Top 83%)9773(Top 80%)9773(Top 179%)
35K21.75 mi0.75 mi24912+1810263+210263+224386(Top 86%)10270(Top 84%)10270(Top 188%)
23M23.00 mi1.25 mi24905+710278-1510278-1524437(Top 86%)10314(Top 84%)10314(Top 189%)
24M24.00 mi1.00 mi24919-1410299-2110299-2125051(Top 88%)10656(Top 87%)10656(Top 195%)
40K24.85 mi0.85 mi24911+810308-910308-924517(Top 86%)10434(Top 85%)10434(Top 191%)
25.2M25.20 mi0.35 mi24916-510314-610314-625204(Top 89%)10791(Top 88%)10791(Top 197%)
Finish26.22 mi1.02 mi24954-3810337-2310337-2325522(Top 90%)10920(Top 89%)10920(Top 200%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21story building
+97ft-345ft

Overall

25588

Females

10554

F18-39

10554

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

26122

Females

10856

F18-39

10856

10K→15K

6.2 - 9.3 mi

Top 90%
×3story building
+67ft-78ft

Overall

25588

Females

10554

F18-39

10554

15K→20K

9.3 - 12.4 mi

Top 88%
×5story building
+106ft-86ft

Overall

24895

Females

10203

F18-39

10203

20K→Half

12.4 - 13.1 mi

Top 88%
×2story building
+19ft-37ft

Overall

24872

Females

10205

F18-39

10205

Half→25K

13.1 - 15.5 mi

Top 85%
×4story building
+66ft-88ft

Overall

24113

Females

9805

F18-39

9805

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23151

Females

9413

F18-39

9413

30K→20M

18.6 - 20.0 mi

Top 83%
×5story building
+64ft-50ft

Overall

23438

Females

9649

F18-39

9649

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

23522

Females

9773

F18-39

9773

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24386

Females

10270

F18-39

10270

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24437

Females

10314

F18-39

10314

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

25051

Females

10656

F18-39

10656

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

24517

Females

10434

F18-39

10434

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25204

Females

10791

F18-39

10791

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25522

Females

10920

F18-39

10920

Passing Analysis

Category:
Athletes Passed
2335
Passed By
315
Net Change
+2020
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26974
5K → 10K49024+466#26974#26508
10K → 15K34310+333#26508#26175
15K → 20K3549+345#26175#25830
20K → Half536+47#25830#25783
Half → 25K2947+287#25783#25496
25K → 30K4114+407#25496#25089
30K → 20M10617+89#25089#25000
20M → 21M8717+70#25000#24930
21M → 35K4830+18#24930#24912
35K → 23M4538+7#24912#24905
23M → 24M2842-14#24905#24919
24M → 40K4537+8#24919#24911
40K → 25.2M1217-5#24911#24916
25.2M → Finish1957-38#24916#24954
TOTALS2335315+2020
📊

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