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BOSTON MARATHON 2025

Lily Southcott

ON

Bib: 15505 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Division (F18-39)
#0 / 5469
Top 32%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:17/mi
22:39
↑ 97↓ 345
10K· 6.21 mi
7:22/mi
45:33
↑ 79↓ 138
15K· 9.32 mi
7:24/mi
1:08:32
↑ 67↓ 78
20K· 12.43 mi
7:27/mi
1:31:42
↑ 106↓ 86
Half· 13.11 mi
7:21/mi
1:36:43
↑ 19↓ 37
25K· 15.53 mi
7:32/mi
1:55:00
↑ 66↓ 88
30K· 18.64 mi
7:48/mi
2:19:14
↑ 181↓ 148
20M
7:59/mi
2:30:05
↑ 64↓ 50
21M
8:19/mi
2:38:24
↑ 106↓ 24
35K· 21.75 mi
7:57/mi
2:44:21
↑ 17↓ 86
23M
8:06/mi
2:54:29
↑ 23↓ 63
24M
7:59/mi
3:02:28
↓ 82
40K· 24.85 mi
7:56/mi
3:09:15
↓ 20
25.2M
8:16/mi
3:12:06
↑ 13↓ 16
Finish· 26.22 mi
7:26/mi
3:19:40
↑ 22↓ 21
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:36:437:23 /mi⚡ faster
2nd Half
1:42:577:51 /mi+6.4%
Positive split — 6.4% 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
22:397:173.11 mi22:39
7:17
-
10K
45:337:203.10 mi22:54
7:22
+0:05
15K
1:08:327:213.11 mi22:59
7:24
+0:02
20K
1:31:427:233.11 mi23:10
7:27
+0:03
Half(13.11 mi)
1:36:437:230.68 mi5:01
7:21
-0:06
25K
1:55:007:242.42 mi18:17
7:32
+0:11
30K
2:19:147:283.11 mi24:14
7:48
+0:16
20M
2:30:057:301.36 mi10:51
7:59
+0:11
21M
2:38:247:331.00 mi8:19
8:19
+0:20
35K
2:44:217:330.75 mi5:57
7:57
-0:22
23M
2:54:297:351.25 mi10:08
8:06
+0:09
24M
3:02:287:361.00 mi7:59
7:59
-0:07
40K
3:09:157:370.85 mi6:47
7:56
-0:03
25.2M
3:12:067:370.35 mi2:51
8:16
+0:20
Finish(26.22 mi)
3:19:407:371.02 mi7:34
7:26
-0:50
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:17 /mi

Average Pace

7:37 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:58:22

89% of race

Time at Steady Pace

21:18

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:37 /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. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi10286194119411087023082308
10K3.10 mi10600-3142108-1672108-1671093822792279
15K3.11 mi10655-552159-512159-511087023082308
20K3.11 mi10579+762139+202139+201040621572157
Half(13.11 mi)0.68 mi10554+252124+152124+151053922042204
25K2.42 mi10483+712120+42120+41031322412241
30K3.11 mi10305+1782105+152105+15994622592259
20M1.36 mi10286+192138-332138-331035726082608
21M1.00 mi10189+972137+12137+1934723062306
35K0.75 mi10244-552181-442181-441194736043604
23M1.25 mi10243+12237-562237-561071230843084
24M1.00 mi10247-42267-302267-301112733593359
40K0.85 mi10189+582275-82275-8971927782778
25.2M0.35 mi10135+542260+152260+15753418741874
Finish(26.22 mi)1.02 mi10046+892245+152245+15869723882388

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10870

Females

2308

F18-39

2308

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

10938

Females

2279

F18-39

2279

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10870

Females

2308

F18-39

2308

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

10406

Females

2157

F18-39

2157

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

10539

Females

2204

F18-39

2204

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

10313

Females

2241

F18-39

2241

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9946

Females

2259

F18-39

2259

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

10357

Females

2608

F18-39

2608

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

9347

Females

2306

F18-39

2306

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11947

Females

3604

F18-39

3604

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10712

Females

3084

F18-39

3084

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

11127

Females

3359

F18-39

3359

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9719

Females

2778

F18-39

2778

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7534

Females

1874

F18-39

1874

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8697

Females

2388

F18-39

2388

Passing Analysis

Category:
▲Net Change
+0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#10286
5K → 10K
467153-314
#10286 → #10600
10K → 15K
198143-55
#10600 → #10655
15K → 20K
126202+76
#10655 → #10579
20K → Half
1843+25
#10579 → #10554
Half → 25K
122193+71
#10554 → #10483
25K → 30K
130309+178
#10483 → #10305
30K → 20M
107126+19
#10305 → #10286
20M → 21M
54151+97
#10286 → #10189
21M → 35K
9843-55
#10189 → #10244
35K → 23M
110111+1
#10244 → #10243
23M → 24M
8682-4
#10243 → #10247
24M → 40K
4199+58
#10247 → #10189
40K → 25.2M
761+54
#10189 → #10135
25.2M → Finish
39128+89
#10135 → #10046
TOTALS
16031844+240
#10286 → #10046

Passing Visualized

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