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BOSTON MARATHON 2023

Bobi Ahn

Bib: 30987•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:19
Rank: #19426
Start → 5K
27:19 | 8:48/mi
10K· 6.21 mi
54:12
Rank: #19265 (+161)
5K → 10K
26:53 | 8:39/mi
15K· 9.32 mi
1:21:45
Rank: #19450 (-185)
10K → 15K
27:33 | 8:52/mi
20K· 12.43 mi
1:49:56
Rank: #19571 (-121)
15K → 20K
28:11 | 9:04/mi
Half· 13.11 mi
1:56:05
Rank: #19627 (-56)
20K → Half
6:09 | 9:01/mi
25K· 15.53 mi
2:18:07
Rank: #19583 (+44)
Half → 25K
22:02 | 9:05/mi
30K· 18.64 mi
2:47:45
Rank: #19588 (-5)
25K → 30K
29:38 | 9:32/mi
20M
3:01:18
Rank: #19670 (-82)
30K → 20M
13:33 | 9:58/mi
21M
3:11:28
Rank: #19583 (+87)
20M → 21M
10:10 | 10:10/mi
35K· 21.75 mi
3:18:14
Rank: #19545 (+38)
21M → 35K
6:46 | 9:03/mi
23M
3:30:09
Rank: #19471 (+74)
35K → 23M
11:55 | 9:31/mi
24M
3:39:51
Rank: #19506 (-35)
23M → 24M
9:42 | 9:42/mi
40K· 24.85 mi
3:48:32
Rank: #19556 (-50)
24M → 40K
8:41 | 10:09/mi
25.2M
3:52:07
Rank: #19552 (+4)
40K → 25.2M
3:35 | 10:23/mi
Finish· 26.22 mi
4:01:21
Rank: #19521 (+31)
25.2M → Finish
9:14 | 9:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:05
Pace8:51 /mi
2nd Half
Distance13.11 mi
Time2:05:16
Pace9:33 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:3227:198:4827:19
8:48
-
10K
6.21 mi12:12:2554:128:4326:53
8:39
-0:09
15K
9.32 mi12:39:581:21:458:4627:33
8:52
+0:13
20K
12.43 mi13:08:091:49:568:5128:11
9:04
+0:12
Half
13.11 mi13:14:181:56:058:516:09
9:01
-0:03
25K
15.53 mi13:36:202:18:078:5322:02
9:05
+0:04
30K
18.64 mi14:05:582:47:459:0029:38
9:32
+0:27
20M
20.00 mi14:19:313:01:189:0413:33
9:58
+0:26
21M
21.00 mi14:29:413:11:289:0710:10
10:10
+0:12
35K
21.75 mi14:36:273:18:149:076:46
9:03
-1:07
23M
23.00 mi14:48:223:30:099:0811:55
9:31
+0:28
24M
24.00 mi14:58:043:39:519:109:42
9:42
+0:11
40K
24.85 mi15:06:453:48:329:128:41
10:09
+0:27
25.2M
25.20 mi15:10:203:52:079:133:35
10:23
+0:14
Finish
26.22 mi15:19:344:01:219:139:14
9:04
-1:19

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

8:39 /mi

Average Pace

9:13 /mi

Slowest Pace

10:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

54:12

22% of race

Time at Steady Pace

1:39:55

41% of race

Time at Slower Pace

1:27:14

36% of race

Average Pace: 9:12 /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 mi11:45:3227:198:4827:19
8:48
#19426
10K
6.21 mi12:12:2554:128:4326:53
8:39
#19265
15K
9.32 mi12:39:581:21:458:4627:33
8:52
#19450
20K
12.43 mi13:08:091:49:568:5128:11
9:04
#19571
Half
13.11 mi13:14:181:56:058:516:09
9:01
#19627
25K
15.53 mi13:36:202:18:078:5322:02
9:05
#19583
30K
18.64 mi14:05:582:47:459:0029:38
9:32
#19588
20M
20.00 mi14:19:313:01:189:0413:33
9:58
#19670
21M
21.00 mi14:29:413:11:289:0710:10
10:10
#19583
35K
21.75 mi14:36:273:18:149:076:46
9:03
#19545
23M
23.00 mi14:48:223:30:099:0811:55
9:31
#19471
24M
24.00 mi14:58:043:39:519:109:42
9:42
#19506
40K
24.85 mi15:06:453:48:329:128:41
10:09
#19556
25.2M
25.20 mi15:10:203:52:079:133:35
10:23
#19552
Finish
26.22 mi15:19:344:01:219:139:14
9:04
#19521
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi194267460746019892(Top 75%)7627(Top 67%)7627(Top 632%)
10K6.21 mi3.10 mi19265+1617318+1427318+14219159(Top 72%)7180(Top 63%)7180(Top 595%)
15K9.32 mi3.11 mi19450-1857425-1077425-10719892(Top 75%)7627(Top 67%)7627(Top 632%)
20K12.43 mi3.11 mi19571-1217469-447469-4420016(Top 75%)7688(Top 67%)7688(Top 637%)
Half13.11 mi0.68 mi19627-567499-307499-3020513(Top 77%)7968(Top 70%)7968(Top 660%)
25K15.53 mi2.42 mi19583+447475+247475+2419374(Top 73%)7353(Top 64%)7353(Top 609%)
30K18.64 mi3.11 mi19588-57484-97484-919583(Top 74%)7524(Top 66%)7524(Top 623%)
20M20.00 mi1.36 mi19670-827539-557539-5520411(Top 77%)8082(Top 71%)8082(Top 670%)
21M21.00 mi1.00 mi19583+877505+347505+3418622(Top 70%)7125(Top 62%)7125(Top 590%)
35K21.75 mi0.75 mi19545+387489+167489+1618109(Top 68%)6903(Top 60%)6903(Top 572%)
23M23.00 mi1.25 mi19471+747451+387451+3818417(Top 69%)7089(Top 62%)7089(Top 587%)
24M24.00 mi1.00 mi19506-357486-357486-3519907(Top 75%)7919(Top 69%)7919(Top 656%)
40K24.85 mi0.85 mi19556-507518-327518-3220388(Top 77%)8269(Top 72%)8269(Top 685%)
25.2M25.20 mi0.35 mi19552+47522-47522-418793(Top 71%)7397(Top 65%)7397(Top 613%)
Finish26.22 mi1.02 mi19521+317516+67516+618305(Top 69%)7071(Top 62%)7071(Top 586%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

19892

Females

7627

F50-54

7627

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

19159

Females

7180

F50-54

7180

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

19892

Females

7627

F50-54

7627

15K→20K

9.3 - 12.4 mi

Top 75%
×5stories
+106ft-86ft

Overall

20016

Females

7688

F50-54

7688

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

20513

Females

7968

F50-54

7968

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19374

Females

7353

F50-54

7353

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19583

Females

7524

F50-54

7524

30K→20M

18.6 - 20.0 mi

Top 77%
×5stories
+64ft-50ft

Overall

20411

Females

8082

F50-54

8082

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

18622

Females

7125

F50-54

7125

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18109

Females

6903

F50-54

6903

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

18417

Females

7089

F50-54

7089

23M→24M

23.0 - 24.0 mi

Top 75%
×6stories
+12ft-82ft

Overall

19907

Females

7919

F50-54

7919

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20388

Females

8269

F50-54

8269

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

18793

Females

7397

F50-54

7397

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2stories
+22ft-21ft

Overall

18305

Females

7071

F50-54

7071

Passing Analysis

Category:
Athletes Passed
1487
Passed By
1582
Net Change
-95
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19426
5K → 10K427266+161#19426#19265
10K → 15K114299-185#19265#19450
15K → 20K120241-121#19450#19571
20K → Half1571-56#19571#19627
Half → 25K13490+44#19627#19583
25K → 30K159164-5#19583#19588
30K → 20M59141-82#19588#19670
20M → 21M12437+87#19670#19583
21M → 35K6123+38#19583#19545
35K → 23M11440+74#19545#19471
23M → 24M4580-35#19471#19506
24M → 40K3080-50#19506#19556
40K → 25.2M2319+4#19556#19552
25.2M → Finish6231+31#19552#19521
TOTALS14871582-95
📊

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