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BOSTON MARATHON 2026

Brittany Williams

Bib: 28518•F

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0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F45-49)
#0 / 1786
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
37:44
3.11 mi
Rank: #28849
Start → 5K
37:44 | 12:09/mi
10K
1:15:34
6.21 mi
Rank: #28804 (+45)
5K → 10K
37:50 | 12:11/mi
15K
1:55:08
9.32 mi
Rank: #28809 (-5)
10K → 15K
39:34 | 12:45/mi
20K
2:32:23
12.43 mi
Rank: #28654 (+155)
15K → 20K
37:15 | 12:00/mi
HALF
2:40:17
13.11 mi
Rank: #28635 (+19)
20K → HALF
7:54 | 11:36/mi
25K
3:09:34
15.53 mi
Rank: #28463 (+172)
HALF → 25K
29:17 | 12:05/mi
30K
3:47:01
18.64 mi
Rank: #28247 (+216)
25K → 30K
37:27 | 12:04/mi
20M
4:02:55
20.00 mi
Rank: #28133 (+114)
30K → 20M
15:54 | 11:43/mi
21M
4:14:16
21.00 mi
Rank: #27992 (+141)
20M → 21M
11:21 | 11:21/mi
35K
4:22:23
21.75 mi
Rank: #27935 (+57)
21M → 35K
8:07 | 10:51/mi
23M
4:35:47
23.00 mi
Rank: #27817 (+118)
35K → 23M
13:24 | 10:43/mi
24M
4:45:53
24.00 mi
Rank: #27720 (+97)
23M → 24M
10:06 | 10:06/mi
40K
4:54:30
24.85 mi
Rank: #27588 (+132)
24M → 40K
8:37 | 10:05/mi
25.2M
4:57:53
25.20 mi
Rank: #27525 (+63)
40K → 25.2M
3:23 | 9:49/mi
FINISH
5:06:33
26.22 mi
Rank: #27375 (+150)
25.2M → FINISH
8:40 | 8:31/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time2:40:17
Pace12:14 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:26:16
Pace11:10 /mi
📊Negative Split: 8.7% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:00:2137:4412:0937:44
12:09
-
10K
6.21 mi12:38:111:15:3412:1037:50
12:11
+0:02
15K
9.32 mi13:17:451:55:0812:2239:34
12:45
+0:34
20K
12.43 mi13:55:002:32:2312:1637:15
12:00
-0:45
HALF
13.11 mi14:02:542:40:1712:147:54
11:36
-0:24
25K
15.53 mi14:32:113:09:3412:1329:17
12:05
+0:29
30K
18.64 mi15:09:383:47:0112:1137:27
12:04
-0:01
20M
20.00 mi15:25:324:02:5512:0915:54
11:43
-0:21
21M
21.00 mi15:36:534:14:1612:0711:21
11:21
-0:22
35K
21.75 mi15:45:004:22:2312:048:07
10:51
-0:30
23M
23.00 mi15:58:244:35:4712:0013:24
10:43
-0:08
24M
24.00 mi16:08:304:45:5311:5510:06
10:06
-0:37
40K
24.85 mi16:17:074:54:3011:518:37
10:05
-0:01
25.2M
25.20 mi16:20:304:57:5311:503:23
9:49
-0:16
FINISH
26.22 mi16:29:105:06:3311:438:40
8:31
-1:18

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:31 /mi

Average Pace

11:42 /mi

Slowest Pace

12:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

52:17

17% of race

Time at Steady Pace

2:56:52

58% of race

Time at Slower Pace

1:17:24

25% of race

Average Pace: 11:41 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi12:00:2137:4412:0937:44
12:09
#28849
10K
6.21 mi12:38:111:15:3412:1037:50
12:11
#28804
15K
9.32 mi13:17:451:55:0812:2239:34
12:45
#28809
20K
12.43 mi13:55:002:32:2312:1637:15
12:00
#28654
HALF
13.11 mi14:02:542:40:1712:147:54
11:36
#28635
25K
15.53 mi14:32:113:09:3412:1329:17
12:05
#28463
30K
18.64 mi15:09:383:47:0112:1137:27
12:04
#28247
20M
20.00 mi15:25:324:02:5512:0915:54
11:43
#28133
21M
21.00 mi15:36:534:14:1612:0711:21
11:21
#27992
35K
21.75 mi15:45:004:22:2312:048:07
10:51
#27935
23M
23.00 mi15:58:244:35:4712:0013:24
10:43
#27817
24M
24.00 mi16:08:304:45:5311:5510:06
10:06
#27720
40K
24.85 mi16:17:074:54:3011:518:37
10:05
#27588
25.2M
25.20 mi16:20:304:57:5311:503:23
9:49
#27525
FINISH
26.22 mi16:29:105:06:3311:438:40
8:31
#27375
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi28849124591245928750(Top 99%)12398(Top 99%)12398(Top 694%)
10K6.21 mi3.10 mi28804+4512433+2612433+2628690(Top 99%)12353(Top 98%)12353(Top 692%)
15K9.32 mi3.11 mi28809-512429+412429+428750(Top 99%)12398(Top 99%)12398(Top 694%)
20K12.43 mi3.11 mi28654+15512330+9912330+9928009(Top 97%)11923(Top 95%)11923(Top 668%)
HALF13.11 mi0.68 mi28635+1912320+1012320+1027959(Top 96%)11930(Top 95%)11930(Top 668%)
25K15.53 mi2.42 mi28463+17212205+11512205+11527596(Top 95%)11723(Top 93%)11723(Top 656%)
30K18.64 mi3.11 mi28247+21612074+13112074+13126854(Top 93%)11376(Top 90%)11376(Top 637%)
20M20.00 mi1.36 mi28133+11412007+6712007+6726015(Top 90%)10990(Top 87%)10990(Top 615%)
21M21.00 mi1.00 mi27992+14111928+7911928+7923879(Top 82%)9910(Top 79%)9910(Top 555%)
35K21.75 mi0.75 mi27935+5711891+3711891+3725007(Top 86%)10528(Top 84%)10528(Top 589%)
23M23.00 mi1.25 mi27817+11811837+5411837+5423868(Top 82%)9980(Top 79%)9980(Top 559%)
24M24.00 mi1.00 mi27720+9711790+4711790+4723108(Top 80%)9612(Top 76%)9612(Top 538%)
40K24.85 mi0.85 mi27588+13211726+6411726+6422178(Top 76%)9202(Top 73%)9202(Top 515%)
25.2M25.20 mi0.35 mi27525+6311694+3211694+3218775(Top 65%)7463(Top 59%)7463(Top 418%)
FINISH26.22 mi1.02 mi27375+15011607+8711607+8718232(Top 63%)7178(Top 57%)7178(Top 402%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21
+97ft-345ft

Overall

28750

Females

12398

F45-49

12398

5K→10K

3.1 - 6.2 mi

Top 99%
×5
+79ft-138ft

Overall

28690

Females

12353

F45-49

12353

10K→15K

6.2 - 9.3 mi

Top 99%
×3
+67ft-78ft

Overall

28750

Females

12398

F45-49

12398

15K→20K

9.3 - 12.4 mi

Top 97%
×5
+106ft-86ft

Overall

28009

Females

11923

F45-49

11923

20K→HALF

12.4 - 13.1 mi

Top 96%
×2
+19ft-37ft

Overall

27959

Females

11930

F45-49

11930

HALF→25K

13.1 - 15.5 mi

Top 95%
×4
+66ft-88ft

Overall

27596

Females

11723

F45-49

11723

25K→30K

15.5 - 18.6 mi

Top 93%
×9
+181ft-148ft

Overall

26854

Females

11376

F45-49

11376

30K→20M

18.6 - 20.0 mi

Top 90%
×5
+64ft-50ft

Overall

26015

Females

10990

F45-49

10990

20M→21M

20.0 - 21.0 mi

Top 82%
×8
+106ft-24ft

Overall

23879

Females

9910

F45-49

9910

21M→35K

21.0 - 21.8 mi

Top 86%
×7
+17ft-86ft

Overall

25007

Females

10528

F45-49

10528

35K→23M

21.8 - 23.0 mi

Top 82%
×5
+23ft-63ft

Overall

23868

Females

9980

F45-49

9980

23M→24M

23.0 - 24.0 mi

Top 80%
×6
+12ft-82ft

Overall

23108

Females

9612

F45-49

9612

24M→40K

24.0 - 24.9 mi

Top 76%
×1
+6ft-20ft

Overall

22178

Females

9202

F45-49

9202

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1
+13ft-16ft

Overall

18775

Females

7463

F45-49

7463

25.2M→FINISH

25.2 - 26.2 mi

Top 63%
×2
+22ft-21ft

Overall

18232

Females

7178

F45-49

7178

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1539
Passed By
65
Net Change
+1474
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28849
5K → 10K6823+45#28849#28804
10K → 15K3035-5#28804#28809
15K → 20K1561+155#28809#28654
20K → HALF223+19#28654#28635
HALF → 25K1731+172#28635#28463
25K → 30K2171+216#28463#28247
30K → 20M1140+114#28247#28133
20M → 21M1410+141#28133#27992
21M → 35K581+57#27992#27935
35K → 23M1180+118#27935#27817
23M → 24M970+97#27817#27720
24M → 40K1320+132#27720#27588
40K → 25.2M630+63#27588#27525
25.2M → FINISH1500+150#27525#27375
TOTALS153965+1474
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing