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BOSTON MARATHON 2023

Myung Gyu Koh

Bib: 23230•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F60-64)
#0 / 527
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
10:29/mi
32:33
↑ 97↓ 3451.5%
10K· 6.21 mi
10:07/mi
1:04:00
↑ 79↓ 1380.4%
15K· 9.32 mi
10:02/mi
1:35:11
↑ 67↓ 78
20K· 12.43 mi
10:08/mi
2:06:40
↑ 106↓ 860.1%
Half· 13.11 mi
10:16/mi
2:13:40
↑ 19↓ 370.5%
25K· 15.53 mi
10:52/mi
2:40:00
↑ 66↓ 880.2%
30K· 18.64 mi
11:33/mi
3:15:52
↑ 181↓ 1480.2%
20M
11:29/mi
3:31:28
↑ 64↓ 500.2%
21M
12:57/mi
3:44:25
↑ 106↓ 241.6%
35K· 21.75 mi
11:24/mi
3:52:57
↑ 17↓ 861.7%
23M
12:01/mi
4:08:00
↑ 23↓ 630.6%
24M
11:30/mi
4:19:30
↓ 821.3%
40K· 24.85 mi
11:28/mi
4:29:18
↓ 200.3%
25.2M
12:43/mi
4:33:41
↑ 13↓ 160.2%
Finish· 26.22 mi
10:47/mi
4:44:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:40
Pace10:12 /mi
2nd Half
Distance13.11 mi
Time2:31:00
Pace11:31 /mi
📊Positive Split: 13.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:5832:3310:2932:33
10:29
-
10K
6.21 mi12:20:251:04:0010:1831:27
10:07
-0:22
15K
9.32 mi12:51:361:35:1110:1331:11
10:02
-0:05
20K
12.43 mi13:23:052:06:4010:1231:29
10:08
+0:06
Half
13.11 mi13:30:052:13:4010:127:00
10:16
+0:08
25K
15.53 mi13:56:252:40:0010:1826:20
10:52
+0:36
30K
18.64 mi14:32:173:15:5210:3035:52
11:33
+0:41
20M
20.00 mi14:47:533:31:2810:3415:36
11:29
-0:04
21M
21.00 mi15:00:503:44:2510:4112:57
12:57
+1:28
35K
21.75 mi15:09:223:52:5710:438:32
11:24
-1:33
23M
23.00 mi15:24:254:08:0010:4715:03
12:01
+0:37
24M
24.00 mi15:35:554:19:3010:4911:30
11:30
-0:31
40K
24.85 mi15:45:434:29:1810:509:48
11:28
-0:02
25.2M
25.20 mi15:50:064:33:4110:524:23
12:43
+1:15
Finish
26.22 mi16:01:054:44:4010:5210:59
10:47
-1:56

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

10:02 /mi

Average Pace

10:52 /mi

Slowest Pace

12:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:50:59

60% of race

Time at Steady Pace

1:21:18

29% of race

Time at Slower Pace

32:23

11% of race

Average Pace: 10:51 /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 mi11:48:5832:3310:2932:33
10:29
#24653
10K
6.21 mi12:20:251:04:0010:1831:27
10:07
#24270
15K
9.32 mi12:51:361:35:1110:1331:11
10:02
#24039
20K
12.43 mi13:23:052:06:4010:1231:29
10:08
#23812
Half
13.11 mi13:30:052:13:4010:127:00
10:16
#23804
25K
15.53 mi13:56:252:40:0010:1826:20
10:52
#23774
30K
18.64 mi14:32:173:15:5210:3035:52
11:33
#23833
20M
20.00 mi14:47:533:31:2810:3415:36
11:29
#23796
21M
21.00 mi15:00:503:44:2510:4112:57
12:57
#23839
35K
21.75 mi15:09:223:52:5710:438:32
11:24
#23849
23M
23.00 mi15:24:254:08:0010:4715:03
12:01
#23886
24M
24.00 mi15:35:554:19:3010:4911:30
11:30
#23895
40K
24.85 mi15:45:434:29:1810:509:48
11:28
#23860
25.2M
25.20 mi15:50:064:33:4110:524:23
12:43
#23853
Finish
26.22 mi16:01:054:44:4010:5210:59
10:47
#23858
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi24653102471024723569(Top 89%)9647(Top 84%)9647(Top 1831%)
10K6.21 mi3.10 mi24270+38310039+20810039+20823963(Top 90%)9868(Top 86%)9868(Top 1872%)
15K9.32 mi3.11 mi24039+2319912+1279912+12723569(Top 89%)9647(Top 84%)9647(Top 1831%)
20K12.43 mi3.11 mi23812+2279786+1269786+12623172(Top 87%)9441(Top 83%)9441(Top 1791%)
Half13.11 mi0.68 mi23804+89786978623790(Top 89%)9797(Top 86%)9797(Top 1859%)
25K15.53 mi2.42 mi23774+309773+139773+1323766(Top 89%)9831(Top 86%)9831(Top 1865%)
30K18.64 mi3.11 mi23833-599826-539826-5323924(Top 90%)9975(Top 87%)9975(Top 1893%)
20M20.00 mi1.36 mi23796+379813+139813+1323496(Top 88%)9787(Top 86%)9787(Top 1857%)
21M21.00 mi1.00 mi23839-439850-379850-3724027(Top 90%)10103(Top 88%)10103(Top 1917%)
35K21.75 mi0.75 mi23849-109861-119861-1123985(Top 90%)10123(Top 89%)10123(Top 1921%)
23M23.00 mi1.25 mi23886-379891-309891-3024046(Top 90%)10154(Top 89%)10154(Top 1927%)
24M24.00 mi1.00 mi23895-99904-139904-1323872(Top 90%)10092(Top 88%)10092(Top 1915%)
40K24.85 mi0.85 mi23860+359893+119893+1123162(Top 87%)9745(Top 85%)9745(Top 1849%)
25.2M25.20 mi0.35 mi23853+79892+19892+123614(Top 89%)9989(Top 87%)9989(Top 1895%)
Finish26.22 mi1.02 mi23858-59898-69898-623582(Top 89%)9948(Top 87%)9948(Top 1888%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

23569

Females

9647

F60-64

9647

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

23963

Females

9868

F60-64

9868

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

23569

Females

9647

F60-64

9647

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23172

Females

9441

F60-64

9441

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23790

Females

9797

F60-64

9797

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

23766

Females

9831

F60-64

9831

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

23924

Females

9975

F60-64

9975

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23496

Females

9787

F60-64

9787

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

24027

Females

10103

F60-64

10103

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

23985

Females

10123

F60-64

10123

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

24046

Females

10154

F60-64

10154

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

23872

Females

10092

F60-64

10092

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23162

Females

9745

F60-64

9745

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

23614

Females

9989

F60-64

9989

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23582

Females

9948

F60-64

9948

Passing Analysis

Category:
Athletes Passed
1442
Passed By
647
Net Change
+795
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24653
5K → 10K44461+383#24653#24270
10K → 15K27443+231#24270#24039
15K → 20K25528+227#24039#23812
20K → Half2416+8#23812#23804
Half → 25K10070+30#23804#23774
25K → 30K84143-59#23774#23833
30K → 20M7336+37#23833#23796
20M → 21M3477-43#23796#23839
21M → 35K2333-10#23839#23849
35K → 23M2360-37#23849#23886
23M → 24M2938-9#23886#23895
24M → 40K4510+35#23895#23860
40K → 25.2M147+7#23860#23853
25.2M → Finish2025-5#23853#23858
TOTALS1442647+795
📊

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