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BOSTON MARATHON 2023

Daniel Koh

Bib: 27393•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 21%
Gender (Male)
#0 / 15176
Top 33%
Division (M18-39)
#0 / 5285
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
7:18/mi
22:42
↑ 97↓ 3451.5%
10K· 6.21 mi
7:06/mi
44:46
↑ 79↓ 1380.4%
15K· 9.32 mi
7:13/mi
1:07:10
↑ 67↓ 78
20K· 12.43 mi
7:05/mi
1:29:11
↑ 106↓ 860.1%
Half· 13.11 mi
6:58/mi
1:33:56
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:51:20
↑ 66↓ 880.2%
30K· 18.64 mi
7:15/mi
2:13:52
↑ 181↓ 1480.2%
20M
7:08/mi
2:23:34
↑ 64↓ 500.2%
21M
7:12/mi
2:30:46
↑ 106↓ 241.6%
35K· 21.75 mi
6:53/mi
2:35:55
↑ 17↓ 861.7%
23M
7:05/mi
2:44:47
↑ 23↓ 630.6%
24M
6:50/mi
2:51:37
↓ 821.3%
40K· 24.85 mi
6:52/mi
2:57:29
↓ 200.3%
25.2M
7:09/mi
2:59:57
↑ 13↓ 160.2%
Finish· 26.22 mi
6:27/mi
3:06:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:33:56
Pace7:10 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:35
Pace7:04 /mi
📊Negative Split: 1.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5922:427:1822:42
7:18
-
10K
6.21 mi12:05:0344:467:1222:04
7:06
-0:12
15K
9.32 mi12:27:271:07:107:1222:24
7:13
+0:07
20K
12.43 mi12:49:281:29:117:1122:01
7:05
-0:08
Half
13.11 mi12:54:131:33:567:104:45
6:58
-0:07
25K
15.53 mi13:11:371:51:207:1017:24
7:11
+0:13
30K
18.64 mi13:34:092:13:527:1122:32
7:15
+0:04
20M
20.00 mi13:43:512:23:347:119:42
7:08
-0:07
21M
21.00 mi13:51:032:30:467:117:12
7:12
+0:04
35K
21.75 mi13:56:122:35:557:105:09
6:53
-0:19
23M
23.00 mi14:05:042:44:477:108:52
7:05
+0:12
24M
24.00 mi14:11:542:51:377:096:50
6:50
-0:15
40K
24.85 mi14:17:462:57:297:085:52
6:52
+0:02
25.2M
25.20 mi14:20:142:59:577:082:28
7:09
+0:17
Finish
26.22 mi14:26:483:06:317:076:34
6:27
-0:42

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

6:27 /mi

Average Pace

7:07 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:00:03

32% of race

Time at Steady Pace

2:06:28

68% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /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 mi11:42:5922:427:1822:42
7:18
#8126
10K
6.21 mi12:05:0344:467:1222:04
7:06
#7791
15K
9.32 mi12:27:271:07:107:1222:24
7:13
#7786
20K
12.43 mi12:49:281:29:117:1122:01
7:05
#7382
Half
13.11 mi12:54:131:33:567:104:45
6:58
#7309
25K
15.53 mi13:11:371:51:207:1017:24
7:11
#7169
30K
18.64 mi13:34:092:13:527:1122:32
7:15
#6873
20M
20.00 mi13:43:512:23:347:119:42
7:08
#6695
21M
21.00 mi13:51:032:30:467:117:12
7:12
#6452
35K
21.75 mi13:56:122:35:557:105:09
6:53
#6363
23M
23.00 mi14:05:042:44:477:108:52
7:05
#6194
24M
24.00 mi14:11:542:51:377:096:50
6:50
#6032
40K
24.85 mi14:17:462:57:297:085:52
6:52
#5872
25.2M
25.20 mi14:20:142:59:577:082:28
7:09
#5789
Finish
26.22 mi14:26:483:06:317:076:34
6:27
#5588
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8126705570557847(Top 29%)6816(Top 45%)6816(Top 129%)
10K6.21 mi3.10 mi7791+3356833+2226833+2227447(Top 28%)6557(Top 43%)6557(Top 124%)
15K9.32 mi3.11 mi7786+56816+176816+177847(Top 29%)6816(Top 45%)6816(Top 129%)
20K12.43 mi3.11 mi7382+4046527+2896527+2896474(Top 24%)5819(Top 38%)5819(Top 110%)
Half13.11 mi0.68 mi7309+736468+596468+596311(Top 24%)5721(Top 38%)5721(Top 108%)
25K15.53 mi2.42 mi7169+1406359+1096359+1096523(Top 25%)5813(Top 38%)5813(Top 110%)
30K18.64 mi3.11 mi6873+2966115+2446115+2445781(Top 22%)5207(Top 34%)5207(Top 99%)
20M20.00 mi1.36 mi6695+1785971+1445971+1444809(Top 18%)4389(Top 29%)4389(Top 83%)
21M21.00 mi1.00 mi6452+2435775+1965775+1963132(Top 12%)2936(Top 19%)2936(Top 56%)
35K21.75 mi0.75 mi6363+895711+645711+644698(Top 18%)4263(Top 28%)4263(Top 81%)
23M23.00 mi1.25 mi6194+1695571+1405571+1404230(Top 16%)3873(Top 26%)3873(Top 73%)
24M24.00 mi1.00 mi6032+1625430+1415430+1413857(Top 14%)3529(Top 23%)3529(Top 67%)
40K24.85 mi0.85 mi5872+1605300+1305300+1303150(Top 12%)2894(Top 19%)2894(Top 55%)
25.2M25.20 mi0.35 mi5789+835231+695231+692392(Top 9%)2225(Top 15%)2225(Top 42%)
Finish26.22 mi1.02 mi5588+2015064+1675064+1672244(Top 8%)2084(Top 14%)2084(Top 39%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

7847

Males

6816

M18-39

6816

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7447

Males

6557

M18-39

6557

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

7847

Males

6816

M18-39

6816

15K→20K

9.3 - 12.4 mi

Top 24%
×5story building
+106ft-86ft

Overall

6474

Males

5819

M18-39

5819

20K→Half

12.4 - 13.1 mi

Top 24%
×2story building
+19ft-37ft

Overall

6311

Males

5721

M18-39

5721

Half→25K

13.1 - 15.5 mi

Top 25%
×4story building
+66ft-88ft

Overall

6523

Males

5813

M18-39

5813

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

5781

Males

5207

M18-39

5207

30K→20M

18.6 - 20.0 mi

Top 18%
×5story building
+64ft-50ft

Overall

4809

Males

4389

M18-39

4389

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3132

Males

2936

M18-39

2936

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

4698

Males

4263

M18-39

4263

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4230

Males

3873

M18-39

3873

23M→24M

23.0 - 24.0 mi

Top 14%
×6story building
+12ft-82ft

Overall

3857

Males

3529

M18-39

3529

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3150

Males

2894

M18-39

2894

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2392

Males

2225

M18-39

2225

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2story building
+22ft-21ft

Overall

2244

Males

2084

M18-39

2084

Passing Analysis

Category:
Athletes Passed
2849
Passed By
311
Net Change
+2538
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8126
5K → 10K448113+335#8126#7791
10K → 15K137132+5#7791#7786
15K → 20K41410+404#7786#7382
20K → Half774+73#7382#7309
Half → 25K15414+140#7309#7169
25K → 30K31721+296#7169#6873
30K → 20M1824+178#6873#6695
20M → 21M2430+243#6695#6452
21M → 35K945+89#6452#6363
35K → 23M1734+169#6363#6194
23M → 24M1653+162#6194#6032
24M → 40K1600+160#6032#5872
40K → 25.2M841+83#5872#5789
25.2M → Finish2010+201#5789#5588
TOTALS2849311+2538
📊

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