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BOSTON MARATHON 2025

Brittany Williams

MA

Bib: 15290 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 41%
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
7:44/mi
24:03
↑ 97↓ 345
10K· 6.21 mi
7:48/mi
48:17
↑ 79↓ 138
15K· 9.32 mi
7:44/mi
1:12:18
↑ 67↓ 78
20K· 12.43 mi
7:41/mi
1:36:09
↑ 106↓ 86
Half· 13.11 mi
7:27/mi
1:41:14
↑ 19↓ 37
25K· 15.53 mi
7:44/mi
1:59:58
↑ 66↓ 88
30K· 18.64 mi
7:59/mi
2:24:45
↑ 181↓ 148
20M
8:00/mi
2:35:37
↑ 64↓ 50
21M
8:18/mi
2:43:55
↑ 106↓ 24
35K· 21.75 mi
7:45/mi
2:49:43
↑ 17↓ 86
23M
7:56/mi
2:59:39
↑ 23↓ 63
24M
7:40/mi
3:07:19
↓ 82
40K· 24.85 mi
7:38/mi
3:13:51
↓ 20
25.2M
8:16/mi
3:16:42
↑ 13↓ 16
Finish· 26.22 mi
7:12/mi
3:24:02
↑ 22↓ 21
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:41:147:43 /mi⚡ faster
2nd Half
1:42:487:51 /mi+1.5%
Positive split — 1.5% 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
24:037:443.11 mi24:03
7:44
-
10K
48:177:463.10 mi24:14
7:48
+0:04
15K
1:12:187:453.11 mi24:01
7:44
-0:04
20K
1:36:097:443.11 mi23:51
7:41
-0:03
Half(13.11 mi)
1:41:147:430.68 mi5:05
7:27
-0:14
25K
1:59:587:432.42 mi18:44
7:44
+0:17
30K
2:24:457:463.11 mi24:47
7:59
+0:15
20M
2:35:377:471.36 mi10:52
8:00
+0:01
21M
2:43:557:481.00 mi8:18
8:18
+0:18
35K
2:49:437:480.75 mi5:48
7:45
-0:33
23M
2:59:397:491.25 mi9:56
7:56
+0:11
24M
3:07:197:481.00 mi7:40
7:40
-0:16
40K
3:13:517:480.85 mi6:32
7:38
-0:02
25.2M
3:16:427:480.35 mi2:51
8:16
+0:38
Finish(26.22 mi)
3:24:027:471.02 mi7:20
7:12
-1:04
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:12 /mi

Average Pace

7:47 /mi

Slowest Pace

8:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:27:18

72% of race

Time at Steady Pace

56:44

28% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:47 /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 mi14297409640961378538853885
10K3.10 mi14500-2034233-1374233-1371479844174417
15K3.11 mi14267+2334119+1144119+1141378538853885
20K3.11 mi13687+5803833+2863833+2861220431093109
Half(13.11 mi)0.68 mi13551+1363759+743759+741139126362636
25K2.42 mi13212+3393603+1563603+1561176930093009
30K3.11 mi12783+4293408+1953408+1951122828992899
20M1.36 mi12569+2143346+623346+621045026642664
21M1.00 mi12345+2243259+873259+87925622802280
35K0.75 mi12250+953231+283231+281050828592859
23M1.25 mi12049+2013158+733158+73956725332533
24M1.00 mi11885+1643110+483110+48894223052305
40K0.85 mi11677+2083036+743036+74776118871887
25.2M0.35 mi11595+823007+293007+29755218921892
Finish(26.22 mi)1.02 mi11349+2462926+812926+81706816861686

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13785

Females

3885

F18-39

3885

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

14798

Females

4417

F18-39

4417

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13785

Females

3885

F18-39

3885

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12204

Females

3109

F18-39

3109

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

11391

Females

2636

F18-39

2636

Half→25K

13.1 - 15.5 mi

Top 41%
×4story building
+66ft-88ft

Overall

11769

Females

3009

F18-39

3009

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11228

Females

2899

F18-39

2899

30K→20M

18.6 - 20.0 mi

Top 37%
×5story building
+64ft-50ft

Overall

10450

Females

2664

F18-39

2664

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

9256

Females

2280

F18-39

2280

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

10508

Females

2859

F18-39

2859

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

9567

Females

2533

F18-39

2533

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8942

Females

2305

F18-39

2305

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7761

Females

1887

F18-39

1887

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7552

Females

1892

F18-39

1892

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2story building
+22ft-21ft

Overall

7068

Females

1686

F18-39

1686

Passing Analysis

Category:
▲Net Change
+0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#14297
5K → 10K
411208-203
#14297 → #14500
10K → 15K
98331+233
#14500 → #14267
15K → 20K
13593+580
#14267 → #13687
20K → Half
2138+136
#13687 → #13551
Half → 25K
22361+339
#13551 → #13212
25K → 30K
43472+429
#13212 → #12783
30K → 20M
24238+214
#12783 → #12569
20M → 21M
15239+224
#12569 → #12345
21M → 35K
13108+95
#12345 → #12250
35K → 23M
19220+201
#12250 → #12049
23M → 24M
7171+164
#12049 → #11885
24M → 40K
6214+208
#11885 → #11677
40K → 25.2M
082+82
#11677 → #11595
25.2M → Finish
8254+246
#11595 → #11349
TOTALS
6813629+2948
#14297 → #11349

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