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BOSTON MARATHON 2023

Eric Koh

Bib: 14358•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
Division (M55-59)
#0 / 1422
Top 22%
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
7:42/mi
23:56
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
47:09
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:10:21
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:34:03
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:39:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:57:55
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:22:52
↑ 181↓ 1480.2%
20M
7:53/mi
2:33:35
↑ 64↓ 500.2%
21M
8:18/mi
2:41:53
↑ 106↓ 241.6%
35K· 21.75 mi
7:40/mi
2:47:37
↑ 17↓ 861.7%
23M
7:58/mi
2:57:36
↑ 23↓ 630.6%
24M
7:43/mi
3:05:19
↓ 821.3%
40K· 24.85 mi
7:48/mi
3:11:59
↓ 200.3%
25.2M
8:19/mi
3:14:51
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
3:22:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:15
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time1:43:13
Pace7:52 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4023:567:4223:56
7:42
-
10K
6.21 mi11:15:5347:097:3523:13
7:28
-0:14
15K
9.32 mi11:39:051:10:217:3323:12
7:28
0:00
20K
12.43 mi12:02:471:34:037:3423:42
7:38
+0:10
Half
13.11 mi12:07:591:39:157:345:12
7:37
-0:01
25K
15.53 mi12:26:391:57:557:3518:40
7:42
+0:05
30K
18.64 mi12:51:362:22:527:4024:57
8:02
+0:20
20M
20.00 mi13:02:192:33:357:4110:43
7:53
-0:09
21M
21.00 mi13:10:372:41:537:438:18
8:18
+0:25
35K
21.75 mi13:16:212:47:377:425:44
7:40
-0:38
23M
23.00 mi13:26:202:57:367:439:59
7:58
+0:18
24M
24.00 mi13:34:033:05:197:437:43
7:43
-0:15
40K
24.85 mi13:40:433:11:597:436:40
7:48
+0:05
25.2M
25.20 mi13:43:353:14:517:442:52
8:19
+0:31
Finish
26.22 mi13:51:123:22:287:447:37
7:28
-0:51

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

7:28 /mi

Average Pace

7:44 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:11:18

94% of race

Time at Steady Pace

11:10

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:43 /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 mi10:52:4023:567:4223:56
7:42
#11463
10K
6.21 mi11:15:5347:097:3523:13
7:28
#10807
15K
9.32 mi11:39:051:10:217:3323:12
7:28
#10477
20K
12.43 mi12:02:471:34:037:3423:42
7:38
#10412
Half
13.11 mi12:07:591:39:157:345:12
7:37
#10463
25K
15.53 mi12:26:391:57:557:3518:40
7:42
#10411
30K
18.64 mi12:51:362:22:527:4024:57
8:02
#10467
20M
20.00 mi13:02:192:33:357:4110:43
7:53
#10397
21M
21.00 mi13:10:372:41:537:438:18
8:18
#10290
35K
21.75 mi13:16:212:47:377:425:44
7:40
#10255
23M
23.00 mi13:26:202:57:367:439:59
7:58
#10187
24M
24.00 mi13:34:033:05:197:437:43
7:43
#10117
40K
24.85 mi13:40:433:11:597:436:40
7:48
#10027
25.2M
25.20 mi13:43:353:14:517:442:52
8:19
#9981
Finish
26.22 mi13:51:123:22:287:447:37
7:28
#9870
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi11463887588759906(Top 37%)8096(Top 53%)8096(Top 569%)
10K6.21 mi3.10 mi10807+6568564+3118564+31110227(Top 38%)8289(Top 55%)8289(Top 583%)
15K9.32 mi3.11 mi10477+3308410+1548410+1549906(Top 37%)8096(Top 53%)8096(Top 569%)
20K12.43 mi3.11 mi10412+658369+418369+4110293(Top 39%)8231(Top 54%)8231(Top 579%)
Half13.11 mi0.68 mi10463-518397-288397-2811127(Top 42%)8659(Top 57%)8659(Top 609%)
25K15.53 mi2.42 mi10411+528345+528345+5210269(Top 39%)8132(Top 54%)8132(Top 572%)
30K18.64 mi3.11 mi10467-568318+278318+2711126(Top 42%)8404(Top 55%)8404(Top 591%)
20M20.00 mi1.36 mi10397+708266+528266+529458(Top 36%)7449(Top 49%)7449(Top 524%)
21M21.00 mi1.00 mi10290+1078183+838183+839223(Top 35%)7195(Top 47%)7195(Top 506%)
35K21.75 mi0.75 mi10255+358151+328151+329678(Top 36%)7450(Top 49%)7450(Top 524%)
23M23.00 mi1.25 mi10187+688080+718080+719558(Top 36%)7262(Top 48%)7262(Top 511%)
24M24.00 mi1.00 mi10117+708024+568024+569178(Top 34%)6981(Top 46%)6981(Top 491%)
40K24.85 mi0.85 mi10027+907942+827942+828655(Top 33%)6639(Top 44%)6639(Top 467%)
25.2M25.20 mi0.35 mi9981+467898+447898+448362(Top 31%)6394(Top 42%)6394(Top 450%)
Finish26.22 mi1.02 mi9870+1117824+747824+748362(Top 31%)6378(Top 42%)6378(Top 449%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9906

Males

8096

M55-59

8096

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10227

Males

8289

M55-59

8289

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9906

Males

8096

M55-59

8096

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10293

Males

8231

M55-59

8231

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11127

Males

8659

M55-59

8659

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10269

Males

8132

M55-59

8132

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11126

Males

8404

M55-59

8404

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

9458

Males

7449

M55-59

7449

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9223

Males

7195

M55-59

7195

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9678

Males

7450

M55-59

7450

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9558

Males

7262

M55-59

7262

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9178

Males

6981

M55-59

6981

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8655

Males

6639

M55-59

6639

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8362

Males

6394

M55-59

6394

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8362

Males

6378

M55-59

6378

Passing Analysis

Category:
Athletes Passed
2474*
Passed By
881
Net Change
+1593
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11463
5K → 10K74286+656#11463#10807
10K → 15K39565+330#10807#10477
15K → 20K176111+65#10477#10412
20K → Half1869-51#10412#10463
Half → 25K159107+52#10463#10411
25K → 30K149205-56#10411#10467
30K → 20M107*37+70#10467#10397
20M → 21M14437+107#10397#10290
21M → 35K6631+35#10290#10255
35K → 23M11042+68#10255#10187
23M → 24M10232+70#10187#10117
24M → 40K11020+90#10117#10027
40K → 25.2M57*11+46#10027#9981
25.2M → Finish139*28+111#9981#9870
TOTALS2474*881+1593

* 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