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BOSTON MARATHON 2023

Brittany Nicholls

Bib: 20476•F

NE

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:32/mi
26:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
52:40
↑ 79↓ 1380.4%
15K· 9.32 mi
8:35/mi
1:19:20
↑ 67↓ 78
20K· 12.43 mi
9:19/mi
1:48:18
↑ 106↓ 860.1%
Half· 13.11 mi
8:40/mi
1:54:13
↑ 19↓ 370.5%
25K· 15.53 mi
9:23/mi
2:16:57
↑ 66↓ 880.2%
30K· 18.64 mi
9:35/mi
2:46:43
↑ 181↓ 1480.2%
20M
9:44/mi
2:59:56
↑ 64↓ 500.2%
21M
10:51/mi
3:10:47
↑ 106↓ 241.6%
35K· 21.75 mi
10:10/mi
3:18:23
↑ 17↓ 861.7%
23M
11:37/mi
3:32:56
↑ 23↓ 630.6%
24M
10:49/mi
3:43:45
↓ 821.3%
40K· 24.85 mi
11:07/mi
3:53:15
↓ 200.3%
25.2M
11:42/mi
3:57:17
↑ 13↓ 160.2%
Finish· 26.22 mi
9:54/mi
4:07:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:13
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:13:09
Pace10:09 /mi
📊Positive Split: 16.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4026:318:3226:31
8:32
-
10K
6.21 mi11:44:4952:408:2926:09
8:25
-0:07
15K
9.32 mi12:11:291:19:208:3126:40
8:35
+0:10
20K
12.43 mi12:40:271:48:188:4328:58
9:19
+0:44
Half
13.11 mi12:46:221:54:138:435:55
8:40
-0:39
25K
15.53 mi13:09:062:16:578:4922:44
9:23
+0:43
30K
18.64 mi13:38:522:46:438:5729:46
9:35
+0:12
20M
20.00 mi13:52:052:59:569:0013:13
9:44
+0:09
21M
21.00 mi14:02:563:10:479:0510:51
10:51
+1:07
35K
21.75 mi14:10:323:18:239:077:36
10:10
-0:41
23M
23.00 mi14:25:053:32:569:1514:33
11:37
+1:27
24M
24.00 mi14:35:543:43:459:1910:49
10:49
-0:48
40K
24.85 mi14:45:243:53:159:239:30
11:07
+0:18
25.2M
25.20 mi14:49:263:57:179:254:02
11:42
+0:35
Finish
26.22 mi14:59:314:07:229:2610:05
9:54
-1:48

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

8:25 /mi

Average Pace

9:26 /mi

Slowest Pace

11:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:15

34% of race

Time at Steady Pace

1:52:22

45% of race

Time at Slower Pace

49:45

20% of race

Average Pace: 9:26 /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 mi11:18:4026:318:3226:31
8:32
#17818
10K
6.21 mi11:44:4952:408:2926:09
8:25
#17764
15K
9.32 mi12:11:291:19:208:3126:40
8:35
#17925
20K
12.43 mi12:40:271:48:188:4328:58
9:19
#18875
Half
13.11 mi12:46:221:54:138:435:55
8:40
#18868
25K
15.53 mi13:09:062:16:578:4922:44
9:23
#19179
30K
18.64 mi13:38:522:46:438:5729:46
9:35
#19329
20M
20.00 mi13:52:052:59:569:0013:13
9:44
#19355
21M
21.00 mi14:02:563:10:479:0510:51
10:51
#19444
35K
21.75 mi14:10:323:18:239:077:36
10:10
#19574
23M
23.00 mi14:25:053:32:569:1514:33
11:37
#19977
24M
24.00 mi14:35:543:43:459:1910:49
10:49
#20140
40K
24.85 mi14:45:243:53:159:239:30
11:07
#20253
25.2M
25.20 mi14:49:263:57:179:254:02
11:42
#20280
Finish
26.22 mi14:59:314:07:229:2610:05
9:54
#20319
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi178186440644018347(Top 69%)6706(Top 59%)6706(Top 357%)
10K6.21 mi3.10 mi17764+546383+576383+5717700(Top 66%)6312(Top 55%)6312(Top 336%)
15K9.32 mi3.11 mi17925-1616479-966479-9618347(Top 69%)6706(Top 59%)6706(Top 357%)
20K12.43 mi3.11 mi18875-9507044-5657044-56521041(Top 79%)8256(Top 72%)8256(Top 440%)
Half13.11 mi0.68 mi18868+77044704418851(Top 71%)7008(Top 61%)7008(Top 373%)
25K15.53 mi2.42 mi19179-3117225-1817225-18120444(Top 77%)7956(Top 70%)7956(Top 424%)
30K18.64 mi3.11 mi19329-1507334-1097334-10919730(Top 74%)7609(Top 67%)7609(Top 405%)
20M20.00 mi1.36 mi19355-267359-257359-2519643(Top 74%)7661(Top 67%)7661(Top 408%)
21M21.00 mi1.00 mi19444-897430-717430-7120506(Top 77%)8194(Top 72%)8194(Top 436%)
35K21.75 mi0.75 mi19574-1307506-767506-7621683(Top 81%)8869(Top 78%)8869(Top 472%)
23M23.00 mi1.25 mi19977-4037755-2497755-24923452(Top 88%)9823(Top 86%)9823(Top 523%)
24M24.00 mi1.00 mi20140-1637857-1027857-10222691(Top 85%)9464(Top 83%)9464(Top 504%)
40K24.85 mi0.85 mi20253-1137932-757932-7522581(Top 85%)9436(Top 83%)9436(Top 502%)
25.2M25.20 mi0.35 mi20280-277955-237955-2321962(Top 82%)9105(Top 80%)9105(Top 485%)
Finish26.22 mi1.02 mi20319-397980-257980-2521469(Top 81%)8825(Top 77%)8825(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18347

Females

6706

F40-44

6706

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17700

Females

6312

F40-44

6312

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18347

Females

6706

F40-44

6706

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

21041

Females

8256

F40-44

8256

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

18851

Females

7008

F40-44

7008

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20444

Females

7956

F40-44

7956

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

19730

Females

7609

F40-44

7609

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19643

Females

7661

F40-44

7661

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

20506

Females

8194

F40-44

8194

21M→35K

21.0 - 21.8 mi

Top 81%
×7story building
+17ft-86ft

Overall

21683

Females

8869

F40-44

8869

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

23452

Females

9823

F40-44

9823

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

22691

Females

9464

F40-44

9464

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22581

Females

9436

F40-44

9436

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21962

Females

9105

F40-44

9105

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

21469

Females

8825

F40-44

8825

Passing Analysis

Category:
Athletes Passed
942
Passed By
3443
Net Change
-2501
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17818
5K → 10K348294+54#17818#17764
10K → 15K132293-161#17764#17925
15K → 20K33983-950#17925#18875
20K → Half2922+7#18875#18868
Half → 25K53364-311#18868#19179
25K → 30K117267-150#19179#19329
30K → 20M75101-26#19329#19355
20M → 21M57146-89#19355#19444
21M → 35K16146-130#19444#19574
35K → 23M13416-403#19574#19977
23M → 24M16179-163#19977#20140
24M → 40K15128-113#20140#20253
40K → 25.2M1037-27#20253#20280
25.2M → Finish2867-39#20280#20319
TOTALS9423443-2501
📊

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