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BOSTON MARATHON 2023

Margaret Alexander

Bib: 25097•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
9:08/mi
28:24
↑ 97↓ 3451.5%
10K· 6.21 mi
8:57/mi
56:12
↑ 79↓ 1380.4%
15K· 9.32 mi
9:02/mi
1:24:17
↑ 67↓ 78
20K· 12.43 mi
8:56/mi
1:52:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:42/mi
1:57:59
↑ 19↓ 370.5%
25K· 15.53 mi
8:55/mi
2:19:37
↑ 66↓ 880.2%
30K· 18.64 mi
9:38/mi
2:49:34
↑ 181↓ 1480.2%
20M
11:20/mi
3:04:58
↑ 64↓ 500.2%
21M
12:28/mi
3:17:26
↑ 106↓ 241.6%
35K· 21.75 mi
10:15/mi
3:25:06
↑ 17↓ 861.7%
23M
11:26/mi
3:39:25
↑ 23↓ 630.6%
24M
11:57/mi
3:51:22
↓ 821.3%
40K· 24.85 mi
12:03/mi
4:01:40
↓ 200.3%
25.2M
12:02/mi
4:05:49
↑ 13↓ 160.2%
Finish· 26.22 mi
10:31/mi
4:16:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:59
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:18:33
Pace10:34 /mi
📊Positive Split: 17.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:1528:249:0828:24
9:08
-
10K
6.21 mi12:12:0356:129:0327:48
8:57
-0:11
15K
9.32 mi12:40:081:24:179:0328:05
9:02
+0:05
20K
12.43 mi13:07:541:52:039:0127:46
8:56
-0:06
Half
13.11 mi13:13:501:57:599:005:56
8:42
-0:14
25K
15.53 mi13:35:282:19:378:5921:38
8:55
+0:13
30K
18.64 mi14:05:252:49:349:0629:57
9:38
+0:43
20M
20.00 mi14:20:493:04:589:1515:24
11:20
+1:42
21M
21.00 mi14:33:173:17:269:2412:28
12:28
+1:08
35K
21.75 mi14:40:573:25:069:267:40
10:15
-2:13
23M
23.00 mi14:55:163:39:259:3214:19
11:26
+1:11
24M
24.00 mi15:07:133:51:229:3811:57
11:57
+0:31
40K
24.85 mi15:17:314:01:409:4310:18
12:03
+0:06
25.2M
25.20 mi15:21:404:05:499:454:09
12:02
-0:01
Finish
26.22 mi15:32:234:16:329:4710:43
10:31
-1:31

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

8:42 /mi

Average Pace

9:47 /mi

Slowest Pace

12:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:37

54% of race

Time at Steady Pace

48:20

19% of race

Time at Slower Pace

1:08:35

27% of race

Average Pace: 9:47 /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 mi11:44:1528:249:0828:24
9:08
#21015
10K
6.21 mi12:12:0356:129:0327:48
8:57
#20829
15K
9.32 mi12:40:081:24:179:0328:05
9:02
#20768
20K
12.43 mi13:07:541:52:039:0127:46
8:56
#20438
Half
13.11 mi13:13:501:57:599:005:56
8:42
#20363
25K
15.53 mi13:35:282:19:378:5921:38
8:55
#20060
30K
18.64 mi14:05:252:49:349:0629:57
9:38
#20042
20M
20.00 mi14:20:493:04:589:1515:24
11:20
#20430
21M
21.00 mi14:33:173:17:269:2412:28
12:28
#20692
35K
21.75 mi14:40:573:25:069:267:40
10:15
#20738
23M
23.00 mi14:55:163:39:259:3214:19
11:26
#20923
24M
24.00 mi15:07:133:51:229:3811:57
11:57
#21178
40K
24.85 mi15:17:314:01:409:4310:18
12:03
#21351
25.2M
25.20 mi15:21:404:05:499:454:09
12:02
#21378
Finish
26.22 mi15:32:234:16:329:4710:43
10:31
#21471
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi210158378837820688(Top 78%)8064(Top 71%)8064(Top 165%)
10K6.21 mi3.10 mi20829+1868222+1568222+15620687(Top 78%)8087(Top 71%)8087(Top 166%)
15K9.32 mi3.11 mi20768+618159+638159+6320688(Top 78%)8064(Top 71%)8064(Top 165%)
20K12.43 mi3.11 mi20438+3307968+1917968+19119413(Top 73%)7334(Top 64%)7334(Top 150%)
Half13.11 mi0.68 mi20363+757921+477921+4719003(Top 71%)7102(Top 62%)7102(Top 145%)
25K15.53 mi2.42 mi20060+3037739+1827739+18218586(Top 70%)6903(Top 60%)6903(Top 141%)
30K18.64 mi3.11 mi20042+187752-137752-1319949(Top 75%)7740(Top 68%)7740(Top 158%)
20M20.00 mi1.36 mi20430-3887985-2337985-23323241(Top 87%)9647(Top 84%)9647(Top 198%)
21M21.00 mi1.00 mi20692-2628131-1468131-14623416(Top 88%)9767(Top 86%)9767(Top 200%)
35K21.75 mi0.75 mi20738-468171-408171-4021886(Top 82%)8985(Top 79%)8985(Top 184%)
23M23.00 mi1.25 mi20923-1858295-1248295-12423134(Top 87%)9660(Top 85%)9660(Top 198%)
24M24.00 mi1.00 mi21178-2558446-1518446-15124455(Top 92%)10406(Top 91%)10406(Top 213%)
40K24.85 mi0.85 mi21351-1738541-958541-9523952(Top 90%)10154(Top 89%)10154(Top 208%)
25.2M25.20 mi0.35 mi21378-278559-188559-1822577(Top 85%)9437(Top 83%)9437(Top 193%)
Finish26.22 mi1.02 mi21471-938622-638622-6323036(Top 87%)9662(Top 85%)9662(Top 198%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

20688

Females

8064

F18-39

8064

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20687

Females

8087

F18-39

8087

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

20688

Females

8064

F18-39

8064

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

19413

Females

7334

F18-39

7334

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

19003

Females

7102

F18-39

7102

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

18586

Females

6903

F18-39

6903

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

19949

Females

7740

F18-39

7740

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

23241

Females

9647

F18-39

9647

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23416

Females

9767

F18-39

9767

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

21886

Females

8985

F18-39

8985

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23134

Females

9660

F18-39

9660

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24455

Females

10406

F18-39

10406

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

23952

Females

10154

F18-39

10154

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22577

Females

9437

F18-39

9437

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

23036

Females

9662

F18-39

9662

Passing Analysis

Category:
Athletes Passed
1678
Passed By
2134
Net Change
-456
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21015
5K → 10K392206+186#21015#20829
10K → 15K209148+61#20829#20768
15K → 20K36838+330#20768#20438
20K → Half761+75#20438#20363
Half → 25K32421+303#20363#20060
25K → 30K166148+18#20060#20042
30K → 20M17405-388#20042#20430
20M → 21M18280-262#20430#20692
21M → 35K2773-46#20692#20738
35K → 23M31216-185#20738#20923
23M → 24M10265-255#20923#21178
24M → 40K7180-173#21178#21351
40K → 25.2M1845-27#21351#21378
25.2M → Finish15108-93#21378#21471
TOTALS16782134-456
📊

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