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BOSTON MARATHON 2025

Leah Williams

MA

Bib: 13035 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 30%
Gender (Female)
#0 / 12228
Top 13%
Division (F18-39)
#0 / 5469
Top 23%
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
6:40/mi
20:44
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:49/mi
41:54
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:00/mi
1:03:39
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:24/mi
1:26:38
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:17/mi
1:31:36
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:51/mi
1:50:38
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:03/mi
2:15:39
↑ 181↓ 1480.2%
138 ft elev
20M
8:04/mi
2:26:37
↑ 64↓ 500.2%
148 ft elev
21M
8:32/mi
2:35:09
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:34/mi
2:40:49
↑ 17↓ 861.7%
156 ft elev
23M
7:55/mi
2:50:44
↑ 23↓ 630.6%
116 ft elev
24M
7:33/mi
2:58:17
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:35/mi
3:04:46
↓ 200.3%
20 ft elev
25.2M
8:27/mi
3:07:41
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:07/mi
3:14:56
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:36
Pace6:59 /mi
2nd Half
Distance13.11 mi
Time1:43:20
Pace7:53 /mi
📊Positive Split: 12.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1820:446:4020:44
6:40
-
10K
6.21 mi11:10:2841:546:4521:10
6:49
+0:09
15K
9.32 mi11:32:131:03:396:5021:45
7:00
+0:11
20K
12.43 mi11:55:121:26:386:5822:59
7:24
+0:24
Half
13.11 mi12:00:101:31:366:594:58
7:17
-0:07
25K
15.53 mi12:19:121:50:387:0719:02
7:51
+0:34
30K
18.64 mi12:44:132:15:397:1725:01
8:03
+0:12
20M
20.00 mi12:55:112:26:377:2010:58
8:04
+0:01
21M
21.00 mi13:03:432:35:097:238:32
8:32
+0:28
35K
21.75 mi13:09:232:40:497:245:40
7:34
-0:58
23M
23.00 mi13:19:182:50:447:259:55
7:55
+0:21
24M
24.00 mi13:26:512:58:177:267:33
7:33
-0:22
40K
24.85 mi13:33:203:04:467:266:29
7:35
+0:02
25.2M
25.20 mi13:36:153:07:417:272:55
8:27
+0:52
Finish
26.22 mi13:43:303:14:567:267:15
7:07
-1:20

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

6:40 /mi

Average Pace

7:26 /mi

Slowest Pace

8:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:15:52

39% of race

Time at Steady Pace

42:41

22% of race

Time at Slower Pace

1:16:23

39% of race

Average Pace: 7:26 /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 mi10:49:1820:446:4020:44
6:40
#5238
10K
6.21 mi11:10:2841:546:4521:10
6:49
#5783
15K
9.32 mi11:32:131:03:396:5021:45
7:00
#6484
20K
12.43 mi11:55:121:26:386:5822:59
7:24
#7309
Half
13.11 mi12:00:101:31:366:594:58
7:17
#7411
25K
15.53 mi12:19:121:50:387:0719:02
7:51
#8083
30K
18.64 mi12:44:132:15:397:1725:01
8:03
#8648
20M
20.00 mi12:55:112:26:377:2010:58
8:04
#8786
21M
21.00 mi13:03:432:35:097:238:32
8:32
#8880
35K
21.75 mi13:09:232:40:497:245:40
7:34
#8860
23M
23.00 mi13:19:182:50:447:259:55
7:55
#8843
24M
24.00 mi13:26:512:58:177:267:33
7:33
#8772
40K
24.85 mi13:33:203:04:467:266:29
7:35
#8669
25.2M
25.20 mi13:36:153:07:417:272:55
8:27
#8642
Finish
26.22 mi13:43:303:14:567:267:15
7:07
#8531
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi52383533537650(Top 27%)915(Top 7%)915(Top 17%)
10K6.21 mi3.10 mi5783-545442-89442-896556(Top 23%)618(Top 5%)618(Top 11%)
15K9.32 mi3.11 mi6484-701592-150592-1507650(Top 27%)915(Top 7%)915(Top 17%)
20K12.43 mi3.11 mi7309-825796-204796-2049897(Top 35%)1907(Top 16%)1907(Top 35%)
Half13.11 mi0.68 mi7411-102827-31827-319864(Top 35%)1880(Top 15%)1880(Top 34%)
25K15.53 mi2.42 mi8083-6721083-2561083-25612751(Top 45%)3522(Top 29%)3522(Top 64%)
30K18.64 mi3.11 mi8648-5651356-2731356-27311762(Top 41%)3164(Top 26%)3164(Top 58%)
20M20.00 mi1.36 mi8786-1381455-991455-9910894(Top 38%)2881(Top 24%)2881(Top 53%)
21M21.00 mi1.00 mi8880-941523-681523-6810697(Top 38%)2945(Top 24%)2945(Top 54%)
35K21.75 mi0.75 mi8860+201536-131536-139171(Top 32%)2193(Top 18%)2193(Top 40%)
23M23.00 mi1.25 mi8843+171571-351571-359448(Top 33%)2468(Top 20%)2468(Top 45%)
24M24.00 mi1.00 mi8772+711580-91580-98070(Top 28%)1891(Top 15%)1891(Top 35%)
40K24.85 mi0.85 mi8669+1031577+31577+37336(Top 26%)1688(Top 14%)1688(Top 31%)
25.2M25.20 mi0.35 mi8642+271579-21579-28596(Top 30%)2309(Top 19%)2309(Top 42%)
Finish26.22 mi1.02 mi8531+1111556+231556+236501(Top 23%)1444(Top 12%)1444(Top 26%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7650

Females

915

F18-39

915

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6556

Females

618

F18-39

618

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7650

Females

915

F18-39

915

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9897

Females

1907

F18-39

1907

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9864

Females

1880

F18-39

1880

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12751

Females

3522

F18-39

3522

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11762

Females

3164

F18-39

3164

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10894

Females

2881

F18-39

2881

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10697

Females

2945

F18-39

2945

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

9171

Females

2193

F18-39

2193

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

9448

Females

2468

F18-39

2468

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

8070

Females

1891

F18-39

1891

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7336

Females

1688

F18-39

1688

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8596

Females

2309

F18-39

2309

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6501

Females

1444

F18-39

1444

Passing Analysis

Category:
Athletes Passed
963
Passed By
4256
Net Change
-3293
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5238
5K → 10K40585-545#5238#5783
10K → 15K39740-701#5783#6484
15K → 20K19844-825#6484#7309
20K → Half6108-102#7309#7411
Half → 25K17689-672#7411#8083
25K → 30K83648-565#8083#8648
30K → 20M63201-138#8648#8786
20M → 21M66160-94#8786#8880
21M → 35K6747+20#8880#8860
35K → 23M128111+17#8860#8843
23M → 24M11544+71#8843#8772
24M → 40K13229+103#8772#8669
40K → 25.2M5023+27#8669#8642
25.2M → Finish13827+111#8642#8531
TOTALS9634256-3293
📊

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