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BOSTON MARATHON 2025

Sara Lazaro

Bib: 21731•F

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:29
Rank: #21739
Start → 5K
8:51/mi
27:29 split
10K· 6.21 mi
54:16
Rank: #21079 (+660)
5K → 10K
8:37/mi
26:47 split
15K· 9.32 mi
1:21:05
Rank: #20751 (+328)
10K → 15K
8:38/mi
26:49 split
20K· 12.43 mi
1:47:55
Rank: #20317 (+434)
15K → 20K
8:38/mi
26:50 split
Half· 13.11 mi
1:53:40
Rank: #20246 (+71)
20K → Half
8:26/mi
5:45 split
25K· 15.53 mi
2:14:53
Rank: #19959 (+287)
Half → 25K
8:45/mi
21:13 split
30K· 18.64 mi
2:43:03
Rank: #19576 (+383)
25K → 30K
9:04/mi
28:10 split
20M
2:55:19
Rank: #19384 (+192)
30K → 20M
9:02/mi
12:16 split
21M
3:04:59
Rank: #19227 (+157)
20M → 21M
9:40/mi
9:40 split
35K· 21.75 mi
3:11:29
Rank: #19144 (+83)
21M → 35K
8:41/mi
6:30 split
23M
3:25:54
Rank: #19664 (-520)
35K → 23M
11:31/mi
14:25 split
24M
3:34:50
Rank: #19557 (+107)
23M → 24M
8:56/mi
8:56 split
40K· 24.85 mi
3:43:39
Rank: #19679 (-122)
24M → 40K
10:19/mi
8:49 split
25.2M
3:47:45
Rank: #19761 (-82)
40K → 25.2M
11:53/mi
4:06 split
Finish· 26.22 mi
3:58:11
Rank: #19975 (-214)
25.2M → Finish
10:14/mi
10:26 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:40
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:04:31
Pace9:30 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:0527:298:5127:29
8:51
-
10K
6.21 mi11:48:5254:168:4426:47
8:37
-0:14
15K
9.32 mi12:15:411:21:058:4226:49
8:38
+0:01
20K
12.43 mi12:42:311:47:558:4126:50
8:38
0:00
Half
13.11 mi12:48:161:53:408:405:45
8:26
-0:12
25K
15.53 mi13:09:292:14:538:4121:13
8:45
+0:19
30K
18.64 mi13:37:392:43:038:4528:10
9:04
+0:19
20M
20.00 mi13:49:552:55:198:4612:16
9:02
-0:02
21M
21.00 mi13:59:353:04:598:499:40
9:40
+0:38
35K
21.75 mi14:06:053:11:298:486:30
8:41
-0:59
23M
23.00 mi14:20:303:25:548:5714:25
11:31
+2:50
24M
24.00 mi14:29:263:34:508:578:56
8:56
-2:35
40K
24.85 mi14:38:153:43:399:008:49
10:19
+1:23
25.2M
25.20 mi14:42:213:47:459:024:06
11:53
+1:34
Finish
26.22 mi14:52:473:58:119:0510:26
10:14
-1:39

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

8:26 /mi

Average Pace

9:05 /mi

Slowest Pace

11:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:10:45

80% of race

Time at Slower Pace

47:26

20% of race

Average Pace: 9:05 /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 mi11:22:0527:298:5127:29
8:51
#21739
10K
6.21 mi11:48:5254:168:4426:47
8:37
#21079
15K
9.32 mi12:15:411:21:058:4226:49
8:38
#20751
20K
12.43 mi12:42:311:47:558:4126:50
8:38
#20317
Half
13.11 mi12:48:161:53:408:405:45
8:26
#20246
25K
15.53 mi13:09:292:14:538:4121:13
8:45
#19959
30K
18.64 mi13:37:392:43:038:4528:10
9:04
#19576
20M
20.00 mi13:49:552:55:198:4612:16
9:02
#19384
21M
21.00 mi13:59:353:04:598:499:40
9:40
#19227
35K
21.75 mi14:06:053:11:298:486:30
8:41
#19144
23M
23.00 mi14:20:303:25:548:5714:25
11:31
#19664
24M
24.00 mi14:29:263:34:508:578:56
8:56
#19557
40K
24.85 mi14:38:153:43:399:008:49
10:19
#19679
25.2M
25.20 mi14:42:213:47:459:024:06
11:53
#19761
Finish
26.22 mi14:52:473:58:119:0510:26
10:14
#19975
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi217398479847920107(Top 71%)7493(Top 61%)7493(Top 575%)
10K6.21 mi3.10 mi21079+6608095+3848095+38420461(Top 72%)7722(Top 63%)7722(Top 593%)
15K9.32 mi3.11 mi20751+3287895+2007895+20020107(Top 71%)7493(Top 61%)7493(Top 575%)
20K12.43 mi3.11 mi20317+4347660+2357660+23519071(Top 67%)6957(Top 57%)6957(Top 534%)
Half13.11 mi0.68 mi20246+717625+357625+3518813(Top 66%)6807(Top 56%)6807(Top 522%)
25K15.53 mi2.42 mi19959+2877460+1657460+16518685(Top 66%)6808(Top 56%)6808(Top 522%)
30K18.64 mi3.11 mi19576+3837282+1787282+17818024(Top 63%)6587(Top 54%)6587(Top 506%)
20M20.00 mi1.36 mi19384+1927202+807202+8016969(Top 60%)6128(Top 50%)6128(Top 470%)
21M21.00 mi1.00 mi19227+1577130+727130+7216908(Top 60%)6218(Top 51%)6218(Top 477%)
35K21.75 mi0.75 mi19144+837098+327098+3216682(Top 59%)6178(Top 51%)6178(Top 474%)
23M23.00 mi1.25 mi19664-5207433-3357433-33524287(Top 86%)10235(Top 84%)10235(Top 785%)
24M24.00 mi1.00 mi19557+1077397+367397+3617059(Top 60%)6541(Top 53%)6541(Top 502%)
40K24.85 mi0.85 mi19679-1227480-837480-8321414(Top 75%)8878(Top 73%)8878(Top 681%)
25.2M25.20 mi0.35 mi19761-827532-527532-5223011(Top 81%)9654(Top 79%)9654(Top 741%)
Finish26.22 mi1.02 mi19975-2147666-1347666-13423637(Top 83%)9991(Top 82%)9991(Top 767%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20107

Females

7493

F50-54

7493

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20461

Females

7722

F50-54

7722

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20107

Females

7493

F50-54

7493

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

19071

Females

6957

F50-54

6957

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18813

Females

6807

F50-54

6807

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18685

Females

6808

F50-54

6808

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

18024

Females

6587

F50-54

6587

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

16969

Females

6128

F50-54

6128

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16908

Females

6218

F50-54

6218

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16682

Females

6178

F50-54

6178

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24287

Females

10235

F50-54

10235

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

17059

Females

6541

F50-54

6541

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21414

Females

8878

F50-54

8878

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

23011

Females

9654

F50-54

9654

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23637

Females

9991

F50-54

9991

Passing Analysis

Category:
Athletes Passed
3088
Passed By
1324
Net Change
+1764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21739
5K → 10K72363+660#21739#21079
10K → 15K38759+328#21079#20751
15K → 20K45521+434#20751#20317
20K → Half743+71#20317#20246
Half → 25K32336+287#20246#19959
25K → 30K43855+383#19959#19576
30K → 20M21220+192#19576#19384
20M → 21M18528+157#19384#19227
21M → 35K9613+83#19227#19144
35K → 23M16536-520#19144#19664
23M → 24M12013+107#19664#19557
24M → 40K35157-122#19557#19679
40K → 25.2M789-82#19679#19761
25.2M → Finish17231-214#19761#19975
TOTALS30881324+1764
📊

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