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BOSTON MARATHON 2023

Alejandra Serra

Bib: 31783•F

CA

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

Start
0:00:00
Race begins
5K· 3.11 mi
31:14
Rank: #23559
Start → 5K
31:14 | 10:03/mi
10K· 6.21 mi
1:01:43
Rank: #23470 (+89)
5K → 10K
30:29 | 9:49/mi
15K· 9.32 mi
1:33:11
Rank: #23597 (-127)
10K → 15K
31:28 | 10:08/mi
20K· 12.43 mi
2:05:19
Rank: #23608 (-11)
15K → 20K
32:08 | 10:21/mi
Half· 13.11 mi
2:12:11
Rank: #23604 (+4)
20K → Half
6:52 | 10:04/mi
25K· 15.53 mi
2:37:59
Rank: #23549 (+55)
Half → 25K
25:48 | 10:38/mi
30K· 18.64 mi
3:11:23
Rank: #23367 (+182)
25K → 30K
33:24 | 10:45/mi
20M
3:26:56
Rank: #23377 (-10)
30K → 20M
15:33 | 11:26/mi
21M
3:38:22
Rank: #23290 (+87)
20M → 21M
11:26 | 11:26/mi
35K· 21.75 mi
3:46:33
Rank: #23284 (+6)
21M → 35K
8:11 | 10:56/mi
23M
4:01:06
Rank: #23304 (-20)
35K → 23M
14:33 | 11:37/mi
24M
4:13:10
Rank: #23392 (-88)
23M → 24M
12:04 | 12:04/mi
40K· 24.85 mi
4:22:46
Rank: #23366 (+26)
24M → 40K
9:36 | 11:14/mi
25.2M
4:27:05
Rank: #23369 (-3)
40K → 25.2M
4:19 | 12:31/mi
Finish· 26.22 mi
4:37:37
Rank: #23340 (+29)
25.2M → Finish
10:32 | 10:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:12:11
Pace10:05 /mi
2nd Half
Distance13.11 mi
Time2:25:26
Pace11:06 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0931:1410:0331:14
10:03
-
10K
6.21 mi12:22:381:01:439:5630:29
9:49
-0:14
15K
9.32 mi12:54:061:33:1110:0031:28
10:08
+0:19
20K
12.43 mi13:26:142:05:1910:0532:08
10:21
+0:13
Half
13.11 mi13:33:062:12:1110:056:52
10:04
-0:17
25K
15.53 mi13:58:542:37:5910:1025:48
10:38
+0:34
30K
18.64 mi14:32:183:11:2310:1633:24
10:45
+0:07
20M
20.00 mi14:47:513:26:5610:2115:33
11:26
+0:41
21M
21.00 mi14:59:173:38:2210:2411:26
11:26
0:00
35K
21.75 mi15:07:283:46:3310:258:11
10:56
-0:30
23M
23.00 mi15:22:014:01:0610:2914:33
11:37
+0:41
24M
24.00 mi15:34:054:13:1010:3312:04
12:04
+0:27
40K
24.85 mi15:43:414:22:4610:349:36
11:14
-0:50
25.2M
25.20 mi15:48:004:27:0510:364:19
12:31
+1:17
Finish
26.22 mi15:58:324:37:3710:3610:32
10:20
-2:11

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

9:49 /mi

Average Pace

10:36 /mi

Slowest Pace

12:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:43

51% of race

Time at Steady Pace

1:07:23

24% of race

Time at Slower Pace

1:07:31

24% of race

Average Pace: 10:35 /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 mi11:52:0931:1410:0331:14
10:03
#23559
10K
6.21 mi12:22:381:01:439:5630:29
9:49
#23470
15K
9.32 mi12:54:061:33:1110:0031:28
10:08
#23597
20K
12.43 mi13:26:142:05:1910:0532:08
10:21
#23608
Half
13.11 mi13:33:062:12:1110:056:52
10:04
#23604
25K
15.53 mi13:58:542:37:5910:1025:48
10:38
#23549
30K
18.64 mi14:32:183:11:2310:1633:24
10:45
#23367
20M
20.00 mi14:47:513:26:5610:2115:33
11:26
#23377
21M
21.00 mi14:59:173:38:2210:2411:26
11:26
#23290
35K
21.75 mi15:07:283:46:3310:258:11
10:56
#23284
23M
23.00 mi15:22:014:01:0610:2914:33
11:37
#23304
24M
24.00 mi15:34:054:13:1010:3312:04
12:04
#23392
40K
24.85 mi15:43:414:22:4610:349:36
11:14
#23366
25.2M
25.20 mi15:48:004:27:0510:364:19
12:31
#23369
Finish
26.22 mi15:58:324:37:3710:3610:32
10:20
#23340
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi235599679967923755(Top 89%)9752(Top 85%)9752(Top 200%)
10K6.21 mi3.10 mi23470+899607+729607+7223305(Top 88%)9514(Top 83%)9514(Top 195%)
15K9.32 mi3.11 mi23597-1279669-629669-6223755(Top 89%)9752(Top 85%)9752(Top 200%)
20K12.43 mi3.11 mi23608-119670-19670-123559(Top 88%)9668(Top 85%)9668(Top 198%)
Half13.11 mi0.68 mi23604+49665+59665+523420(Top 88%)9587(Top 84%)9587(Top 196%)
25K15.53 mi2.42 mi23549+559650+159650+1523426(Top 88%)9628(Top 84%)9628(Top 197%)
30K18.64 mi3.11 mi23367+1829572+789572+7822705(Top 85%)9303(Top 81%)9303(Top 190%)
20M20.00 mi1.36 mi23377-109593-219593-2123425(Top 88%)9752(Top 85%)9752(Top 200%)
21M21.00 mi1.00 mi23290+879549+449549+4421784(Top 82%)8883(Top 78%)8883(Top 182%)
35K21.75 mi0.75 mi23284+69556-79556-723201(Top 87%)9694(Top 85%)9694(Top 198%)
23M23.00 mi1.25 mi23304-209581-259581-2523456(Top 88%)9827(Top 86%)9827(Top 201%)
24M24.00 mi1.00 mi23392-889633-529633-5224613(Top 92%)10489(Top 92%)10489(Top 215%)
40K24.85 mi0.85 mi23366+269631+29631+222791(Top 86%)9549(Top 84%)9549(Top 196%)
25.2M25.20 mi0.35 mi23369-39640-99640-923329(Top 88%)9842(Top 86%)9842(Top 202%)
Finish26.22 mi1.02 mi23340+299630+109630+1022666(Top 85%)9488(Top 83%)9488(Top 194%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21stories
+97ft-345ft

Overall

23755

Females

9752

F18-39

9752

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

23305

Females

9514

F18-39

9514

10K→15K

6.2 - 9.3 mi

Top 89%
×3stories
+67ft-78ft

Overall

23755

Females

9752

F18-39

9752

15K→20K

9.3 - 12.4 mi

Top 88%
×5stories
+106ft-86ft

Overall

23559

Females

9668

F18-39

9668

20K→Half

12.4 - 13.1 mi

Top 88%
×2stories
+19ft-37ft

Overall

23420

Females

9587

F18-39

9587

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

23426

Females

9628

F18-39

9628

25K→30K

15.5 - 18.6 mi

Top 85%
×9stories
+181ft-148ft

Overall

22705

Females

9303

F18-39

9303

30K→20M

18.6 - 20.0 mi

Top 88%
×5stories
+64ft-50ft

Overall

23425

Females

9752

F18-39

9752

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

21784

Females

8883

F18-39

8883

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

23201

Females

9694

F18-39

9694

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

23456

Females

9827

F18-39

9827

23M→24M

23.0 - 24.0 mi

Top 92%
×6stories
+12ft-82ft

Overall

24613

Females

10489

F18-39

10489

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

22791

Females

9549

F18-39

9549

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

23329

Females

9842

F18-39

9842

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2stories
+22ft-21ft

Overall

22666

Females

9488

F18-39

9488

Passing Analysis

Category:
Athletes Passed
1159
Passed By
940
Net Change
+219
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23559
5K → 10K262173+89#23559#23470
10K → 15K75202-127#23470#23597
15K → 20K120131-11#23597#23608
20K → Half2521+4#23608#23604
Half → 25K11560+55#23604#23549
25K → 30K21129+182#23549#23367
30K → 20M4555-10#23367#23377
20M → 21M10417+87#23377#23290
21M → 35K3428+6#23290#23284
35K → 23M4262-20#23284#23304
23M → 24M13101-88#23304#23392
24M → 40K5125+26#23392#23366
40K → 25.2M1316-3#23366#23369
25.2M → Finish4920+29#23369#23340
TOTALS1159940+219
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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