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BOSTON MARATHON 2023

Nora Kosmidis

Bib: 17711•F

ON

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0:00
/ mi
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Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 14%
Division (F18-39)
#0 / 4884
Top 25%
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
7:30/mi
23:17
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:29/mi
1:09:44
↑ 67↓ 78
20K· 12.43 mi
7:33/mi
1:33:11
↑ 106↓ 860.1%
Half· 13.11 mi
7:26/mi
1:38:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:31/mi
1:56:28
↑ 66↓ 880.2%
30K· 18.64 mi
7:32/mi
2:19:52
↑ 181↓ 1480.2%
20M
7:33/mi
2:30:08
↑ 64↓ 500.2%
21M
8:01/mi
2:38:09
↑ 106↓ 241.6%
35K· 21.75 mi
7:25/mi
2:43:42
↑ 17↓ 861.7%
23M
7:42/mi
2:53:21
↑ 23↓ 630.6%
24M
7:31/mi
3:00:52
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:07:38
↓ 200.3%
25.2M
8:30/mi
3:10:34
↑ 13↓ 160.2%
Finish· 26.22 mi
7:46/mi
3:18:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:15
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:40:14
Pace7:39 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2423:177:3023:17
7:30
-
10K
6.21 mi11:38:3746:307:2923:13
7:28
-0:02
15K
9.32 mi12:01:511:09:447:2923:14
7:29
+0:01
20K
12.43 mi12:25:181:33:117:3023:27
7:33
+0:04
Half
13.11 mi12:30:221:38:157:305:04
7:26
-0:07
25K
15.53 mi12:48:351:56:287:3018:13
7:31
+0:05
30K
18.64 mi13:11:592:19:527:3023:24
7:32
+0:01
20M
20.00 mi13:22:152:30:087:3010:16
7:33
+0:01
21M
21.00 mi13:30:162:38:097:328:01
8:01
+0:28
35K
21.75 mi13:35:492:43:427:325:33
7:25
-0:36
23M
23.00 mi13:45:282:53:217:329:39
7:42
+0:17
24M
24.00 mi13:52:593:00:527:327:31
7:31
-0:11
40K
24.85 mi13:59:453:07:387:336:46
7:55
+0:24
25.2M
25.20 mi14:02:413:10:347:342:56
8:30
+0:35
Finish
26.22 mi14:10:363:18:297:357:55
7:46
-0:44

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

7:25 /mi

Average Pace

7:35 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:15:33

99% of race

Time at Steady Pace

2:56

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi11:15:2423:177:3023:17
7:30
#9593
10K
6.21 mi11:38:3746:307:2923:13
7:28
#9871
15K
9.32 mi12:01:511:09:447:2923:14
7:29
#9876
20K
12.43 mi12:25:181:33:117:3023:27
7:33
#9821
Half
13.11 mi12:30:221:38:157:305:04
7:26
#9802
25K
15.53 mi12:48:351:56:287:3018:13
7:31
#9629
30K
18.64 mi13:11:592:19:527:3023:24
7:32
#9187
20M
20.00 mi13:22:152:30:087:3010:16
7:33
#9004
21M
21.00 mi13:30:162:38:097:328:01
8:01
#8900
35K
21.75 mi13:35:492:43:427:325:33
7:25
#8844
23M
23.00 mi13:45:282:53:217:329:39
7:42
#8765
24M
24.00 mi13:52:593:00:527:327:31
7:31
#8696
40K
24.85 mi13:59:453:07:387:336:46
7:55
#8695
25.2M
25.20 mi14:02:413:10:347:342:56
8:30
#8695
Finish
26.22 mi14:10:363:18:297:357:55
7:46
#8739
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi95931659165910005(Top 38%)1840(Top 16%)1840(Top 38%)
10K6.21 mi3.10 mi9871-2781779-1201779-12010246(Top 38%)1928(Top 17%)1928(Top 39%)
15K9.32 mi3.11 mi9876-51773+61773+610005(Top 38%)1840(Top 16%)1840(Top 38%)
20K12.43 mi3.11 mi9821+551763+101763+109700(Top 36%)1781(Top 16%)1781(Top 36%)
Half13.11 mi0.68 mi9802+191751+121751+129662(Top 36%)1733(Top 15%)1733(Top 35%)
25K15.53 mi2.42 mi9629+1731698+531698+538895(Top 33%)1521(Top 13%)1521(Top 31%)
30K18.64 mi3.11 mi9187+4421561+1371561+1377454(Top 28%)1092(Top 10%)1092(Top 22%)
20M20.00 mi1.36 mi9004+1831504+571504+577224(Top 27%)1116(Top 10%)1116(Top 23%)
21M21.00 mi1.00 mi8900+1041486+181486+187477(Top 28%)1308(Top 11%)1308(Top 27%)
35K21.75 mi0.75 mi8844+561474+121474+127983(Top 30%)1490(Top 13%)1490(Top 31%)
23M23.00 mi1.25 mi8765+791473+11473+17792(Top 29%)1490(Top 13%)1490(Top 31%)
24M24.00 mi1.00 mi8696+691469+41469+47843(Top 29%)1618(Top 14%)1618(Top 33%)
40K24.85 mi0.85 mi8695+11493-241493-249454(Top 36%)2369(Top 21%)2369(Top 49%)
25.2M25.20 mi0.35 mi86951503-101503-109599(Top 36%)2482(Top 22%)2482(Top 51%)
Finish26.22 mi1.02 mi8739-441545-421545-4210458(Top 39%)2911(Top 25%)2911(Top 60%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10005

Females

1840

F18-39

1840

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10246

Females

1928

F18-39

1928

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10005

Females

1840

F18-39

1840

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

9700

Females

1781

F18-39

1781

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

9662

Females

1733

F18-39

1733

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

8895

Females

1521

F18-39

1521

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7454

Females

1092

F18-39

1092

30K→20M

18.6 - 20.0 mi

Top 27%
×5story building
+64ft-50ft

Overall

7224

Females

1116

F18-39

1116

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7477

Females

1308

F18-39

1308

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

7983

Females

1490

F18-39

1490

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7792

Females

1490

F18-39

1490

23M→24M

23.0 - 24.0 mi

Top 29%
×6story building
+12ft-82ft

Overall

7843

Females

1618

F18-39

1618

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9454

Females

2369

F18-39

2369

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9599

Females

2482

F18-39

2482

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10458

Females

2911

F18-39

2911

Passing Analysis

Category:
Athletes Passed
1977*
Passed By
1123
Net Change
+854
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9593
5K → 10K193471-278#9593#9871
10K → 15K177182-5#9871#9876
15K → 20K187*132+55#9876#9821
20K → Half3617+19#9821#9802
Half → 25K20835+173#9802#9629
25K → 30K457*15+442#9629#9187
30K → 20M1918+183#9187#9004
20M → 21M12218+104#9004#8900
21M → 35K7317+56#8900#8844
35K → 23M10728+79#8844#8765
23M → 24M9627+69#8765#8696
24M → 40K6261+1#8696#8695
40K → 25.2M26260#8695#8695
25.2M → Finish4286-44#8695#8739
TOTALS1977*1123+854

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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