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BOSTON MARATHON 2025

Lyndsey De Souza

ON

Bib: 18391 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 38%
Masters (Masters Women)
#0 / 6759
Top 23%
Division (F40-44)
#0 / 1718
Top 46%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:08/mi
25:17
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:07/mi
50:30
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:06/mi
1:15:40
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:04/mi
1:40:43
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:59/mi
1:46:10
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:03/mi
2:05:42
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:22/mi
2:31:42
↑ 181↓ 1480.2%
138 ft elev
20M
8:40/mi
2:43:28
↑ 64↓ 500.2%
148 ft elev
21M
8:55/mi
2:52:23
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:11/mi
2:58:30
↑ 17↓ 861.7%
156 ft elev
23M
8:39/mi
3:09:20
↑ 23↓ 630.6%
116 ft elev
24M
7:56/mi
3:17:16
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:57/mi
3:24:04
↓ 200.3%
20 ft elev
25.2M
8:36/mi
3:27:02
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:40/mi
3:34:51
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:46:108:06 /mi⚡ faster
2nd Half
1:48:418:17 /mi+2.4%
Positive split — 2.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
25:178:083.11 mi25:17
8:08
-
10K
50:308:083.10 mi25:13
8:07
-0:01
15K
1:15:408:073.11 mi25:10
8:06
-0:01
20K
1:40:438:063.11 mi25:03
8:04
-0:02
Half(13.11 mi)
1:46:108:060.68 mi5:27
7:59
-0:05
25K
2:05:428:062.42 mi19:32
8:03
+0:04
30K
2:31:428:083.11 mi26:00
8:22
+0:19
20M
2:43:288:101.36 mi11:46
8:40
+0:18
21M
2:52:238:131.00 mi8:55
8:55
+0:15
35K
2:58:308:120.75 mi6:07
8:11
-0:44
23M
3:09:208:141.25 mi10:50
8:39
+0:28
24M
3:17:168:131.00 mi7:56
7:56
-0:43
40K
3:24:048:130.85 mi6:48
7:57
+0:01
25.2M
3:27:028:130.35 mi2:58
8:36
+0:39
Finish(26.22 mi)
3:34:518:121.02 mi7:49
7:40
-0:56
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:40 /mi

Average Pace

8:12 /mi

Slowest Pace

8:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

3:00:22

84% of race

Time at Steady Pace

34:29

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi17648612061201674055755575
10K3.10 mi17461+1876012+1086012+1081732258895889
15K3.11 mi17215+2465838+1745838+1741674055755575
20K3.11 mi16718+4975566+2725566+2721537648474847
Half(13.11 mi)0.68 mi16669+495542+245542+241583050655065
25K2.42 mi16264+4055319+2235319+2231433643894389
30K3.11 mi15799+4655108+2115108+2111395843444344
20M1.36 mi15648+1515064+445064+441481349414941
21M1.00 mi15455+1934986+784986+781305441544154
35K0.75 mi15353+1024943+434943+431350644374437
23M1.25 mi15261+924931+124931+121427249444944
24M1.00 mi15019+2424812+1194812+1191082732263226
40K0.85 mi14814+2054727+854727+85992629062906
25.2M0.35 mi14707+1074674+534674+53955828352835
Finish(26.22 mi)1.02 mi14531+1764611+634611+631053132463246

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

16740

Females

5575

F40-44

5575

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

17322

Females

5889

F40-44

5889

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

16740

Females

5575

F40-44

5575

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15376

Females

4847

F40-44

4847

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15830

Females

5065

F40-44

5065

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14336

Females

4389

F40-44

4389

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

13958

Females

4344

F40-44

4344

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

14813

Females

4941

F40-44

4941

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13054

Females

4154

F40-44

4154

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13506

Females

4437

F40-44

4437

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14272

Females

4944

F40-44

4944

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10827

Females

3226

F40-44

3226

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9926

Females

2906

F40-44

2906

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9558

Females

2835

F40-44

2835

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

10531

Females

3246

F40-44

3246

Passing Analysis

Category:
Passed
3643
Passed By
526
Net Change
+3117
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17648
5K → 10K387200+187#17648#17461
10K → 15K34498+246#17461#17215
15K → 20K51316+497#17215#16718
20K → Half6617+49#16718#16669
Half → 25K4138+405#16669#16264
25K → 30K49833+465#16264#15799
30K → 20M19645+151#15799#15648
20M → 21M22128+193#15648#15455
21M → 35K11614+102#15455#15353
35K → 23M14755+92#15353#15261
23M → 24M2431+242#15261#15019
24M → 40K2083+205#15019#14814
40K → 25.2M1103+107#14814#14707
25.2M → Finish1815+176#14707#14531
TOTALS3643526+3117

Passing Charts

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