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BOSTON MARATHON 2025

Jenifer Serrano

Bib: 17105•F

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
7:51/mi
24:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:53/mi
48:53
↑ 79↓ 1380.4%
15K· 9.32 mi
7:52/mi
1:13:20
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:38:12
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:43:34
↑ 19↓ 370.5%
25K· 15.53 mi
7:48/mi
2:02:28
↑ 66↓ 880.2%
30K· 18.64 mi
8:20/mi
2:28:20
↑ 181↓ 1480.2%
20M
8:23/mi
2:39:44
↑ 64↓ 500.2%
21M
9:05/mi
2:48:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:54:32
↑ 17↓ 861.7%
23M
8:10/mi
3:04:45
↑ 23↓ 630.6%
24M
8:01/mi
3:12:46
↓ 821.3%
40K· 24.85 mi
11:11/mi
3:22:20
↓ 200.3%
25.2M
19:37/mi
3:29:06
↑ 13↓ 160.2%
Finish· 26.22 mi
15:43/mi
3:45:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:34
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time2:01:33
Pace9:16 /mi
📊Positive Split: 17.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:4524:237:5124:23
7:51
-
10K
6.21 mi11:39:1548:537:5224:30
7:53
+0:02
15K
9.32 mi12:03:421:13:207:5224:27
7:52
-0:01
20K
12.43 mi12:28:341:38:127:5424:52
8:00
+0:08
Half
13.11 mi12:33:561:43:347:545:22
7:52
-0:08
25K
15.53 mi12:52:502:02:287:5318:54
7:48
-0:04
30K
18.64 mi13:18:422:28:207:5725:52
8:20
+0:32
20M
20.00 mi13:30:062:39:447:5911:24
8:23
+0:03
21M
21.00 mi13:39:112:48:498:029:05
9:05
+0:42
35K
21.75 mi13:44:542:54:328:025:43
7:38
-1:27
23M
23.00 mi13:55:073:04:458:0210:13
8:10
+0:32
24M
24.00 mi14:03:083:12:468:028:01
8:01
-0:09
40K
24.85 mi14:12:423:22:208:089:34
11:11
+3:10
25.2M
25.20 mi14:19:283:29:068:186:46
19:37
+8:26
Finish
26.22 mi14:35:293:45:078:3616:01
15:43
-3:54

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

7:38 /mi

Average Pace

8:36 /mi

Slowest Pace

19:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:12:46

86% of race

Time at Slower Pace

32:21

14% of race

Average Pace: 8:35 /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 mi11:14:4524:237:5124:23
7:51
#15258
10K
6.21 mi11:39:1548:537:5224:30
7:53
#15393
15K
9.32 mi12:03:421:13:207:5224:27
7:52
#15233
20K
12.43 mi12:28:341:38:127:5424:52
8:00
#15119
Half
13.11 mi12:33:561:43:347:545:22
7:52
#15100
25K
15.53 mi12:52:502:02:287:5318:54
7:48
#14582
30K
18.64 mi13:18:422:28:207:5725:52
8:20
#14351
20M
20.00 mi13:30:062:39:447:5911:24
8:23
#14214
21M
21.00 mi13:39:112:48:498:029:05
9:05
#14174
35K
21.75 mi13:44:542:54:328:025:43
7:38
#13974
23M
23.00 mi13:55:073:04:458:0210:13
8:10
#13781
24M
24.00 mi14:03:083:12:468:028:01
8:01
#13655
40K
24.85 mi14:12:423:22:208:089:34
11:11
#14328
25.2M
25.20 mi14:19:283:29:068:186:46
19:37
#15297
Finish
26.22 mi14:35:293:45:078:3616:01
15:43
#17169
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi152584693469315008(Top 53%)4588(Top 38%)4588(Top 84%)
10K6.21 mi3.10 mi15393-1354772-794772-7915583(Top 55%)4882(Top 40%)4882(Top 89%)
15K9.32 mi3.11 mi15233+1604696+764696+7615008(Top 53%)4588(Top 38%)4588(Top 84%)
20K12.43 mi3.11 mi15119+1144643+534643+5314981(Top 53%)4641(Top 38%)4641(Top 85%)
Half13.11 mi0.68 mi15100+194641+24641+214903(Top 52%)4581(Top 37%)4581(Top 84%)
25K15.53 mi2.42 mi14582+5184384+2574384+25712338(Top 43%)3305(Top 27%)3305(Top 60%)
30K18.64 mi3.11 mi14351+2314312+724312+7213677(Top 48%)4190(Top 34%)4190(Top 77%)
20M20.00 mi1.36 mi14214+1374254+584254+5813119(Top 46%)4054(Top 33%)4054(Top 74%)
21M21.00 mi1.00 mi14174+404261-74261-714042(Top 49%)4664(Top 38%)4664(Top 85%)
35K21.75 mi0.75 mi13974+2004174+874174+879717(Top 34%)2492(Top 20%)2492(Top 46%)
23M23.00 mi1.25 mi13781+1934107+674107+6711164(Top 39%)3321(Top 27%)3321(Top 61%)
24M24.00 mi1.00 mi13655+1264066+414066+4111428(Top 40%)3551(Top 29%)3551(Top 65%)
40K24.85 mi0.85 mi14328-6734455-3894455-38923550(Top 83%)9960(Top 81%)9960(Top 182%)
25.2M25.20 mi0.35 mi15297-9695022-5675022-56728345(Top 100%)12210(Top 100%)12210(Top 223%)
Finish26.22 mi1.02 mi17169-18726117-10956117-109528299(Top 100%)12193(Top 100%)12193(Top 223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

15008

Females

4588

F18-39

4588

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15583

Females

4882

F18-39

4882

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

15008

Females

4588

F18-39

4588

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14981

Females

4641

F18-39

4641

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14903

Females

4581

F18-39

4581

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

12338

Females

3305

F18-39

3305

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

13677

Females

4190

F18-39

4190

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

13119

Females

4054

F18-39

4054

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

14042

Females

4664

F18-39

4664

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

9717

Females

2492

F18-39

2492

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

11164

Females

3321

F18-39

3321

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11428

Females

3551

F18-39

3551

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23550

Females

9960

F18-39

9960

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1story
+13ft-16ft

Overall

28345

Females

12210

F18-39

12210

25.2M→Finish

25.2 - 26.2 mi

Top 100%
×2story building
+22ft-21ft

Overall

28299

Females

12193

F18-39

12193

Passing Analysis

Category:
Athletes Passed
2613
Passed By
4524
Net Change
-1911
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15258
5K → 10K241376-135#15258#15393
10K → 15K283123+160#15393#15233
15K → 20K259145+114#15233#15119
20K → Half5031+19#15119#15100
Half → 25K5246+518#15100#14582
25K → 30K359128+231#14582#14351
30K → 20M17841+137#14351#14214
20M → 21M13999+40#14214#14174
21M → 35K2033+200#14174#13974
35K → 23M21320+193#13974#13781
23M → 24M15529+126#13781#13655
24M → 40K9682-673#13655#14328
40K → 25.2M0969-969#14328#15297
25.2M → Finish01872-1872#15297#17169
TOTALS26134524-1911
📊

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