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BOSTON MARATHON 2023

David Yoo

Bib: 8578•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 27%
Gender (Male)
#0 / 15176
Top 41%
Masters (Masters Men)
#0 / 9891
Top 28%
Division (M45-49)
#0 / 2252
Top 37%
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
7:22/mi
22:54
↑ 97↓ 3451.5%
10K· 6.21 mi
7:07/mi
45:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:10/mi
1:07:17
↑ 67↓ 78
20K· 12.43 mi
7:27/mi
1:30:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:35:23
↑ 19↓ 370.5%
25K· 15.53 mi
7:35/mi
1:53:46
↑ 66↓ 880.2%
30K· 18.64 mi
7:44/mi
2:17:47
↑ 181↓ 1480.2%
20M
7:28/mi
2:27:56
↑ 64↓ 500.2%
21M
8:33/mi
2:36:29
↑ 106↓ 241.6%
35K· 21.75 mi
6:33/mi
2:41:23
↑ 17↓ 861.7%
23M
7:54/mi
2:51:16
↑ 23↓ 630.6%
24M
6:54/mi
2:58:10
↓ 821.3%
40K· 24.85 mi
6:56/mi
3:04:06
↓ 200.3%
25.2M
7:12/mi
3:06:35
↑ 13↓ 160.2%
Finish· 26.22 mi
6:50/mi
3:13:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:23
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:38:10
Pace7:29 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0622:547:2222:54
7:22
-
10K
6.21 mi11:12:1345:017:1522:07
7:07
-0:15
15K
9.32 mi11:34:291:07:177:1322:16
7:10
+0:03
20K
12.43 mi11:57:381:30:267:1723:09
7:27
+0:17
Half
13.11 mi12:02:351:35:237:174:57
7:15
-0:12
25K
15.53 mi12:20:581:53:467:1918:23
7:35
+0:20
30K
18.64 mi12:44:592:17:477:2324:01
7:44
+0:09
20M
20.00 mi12:55:082:27:567:2410:09
7:28
-0:16
21M
21.00 mi13:03:412:36:297:278:33
8:33
+1:05
35K
21.75 mi13:08:352:41:237:254:54
6:33
-2:00
23M
23.00 mi13:18:282:51:167:279:53
7:54
+1:21
24M
24.00 mi13:25:222:58:107:256:54
6:54
-1:00
40K
24.85 mi13:31:183:04:067:245:56
6:56
+0:02
25.2M
25.20 mi13:33:473:06:357:242:29
7:12
+0:16
Finish
26.22 mi13:40:453:13:337:236:58
6:50
-0:22

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

6:33 /mi

Average Pace

7:23 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

24:42

13% of race

Time at Steady Pace

1:48:01

56% of race

Time at Slower Pace

1:00:50

31% of race

Average Pace: 7:23 /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 mi10:50:0622:547:2222:54
7:22
#8620
10K
6.21 mi11:12:1345:017:1522:07
7:07
#8089
15K
9.32 mi11:34:291:07:177:1322:16
7:10
#7898
20K
12.43 mi11:57:381:30:267:1723:09
7:27
#8093
Half
13.11 mi12:02:351:35:237:174:57
7:15
#8090
25K
15.53 mi12:20:581:53:467:1918:23
7:35
#8249
30K
18.64 mi12:44:592:17:477:2324:01
7:44
#8296
20M
20.00 mi12:55:082:27:567:2410:09
7:28
#8151
21M
21.00 mi13:03:412:36:297:278:33
8:33
#8281
35K
21.75 mi13:08:352:41:237:254:54
6:33
#8022
23M
23.00 mi13:18:282:51:167:279:53
7:54
#8057
24M
24.00 mi13:25:222:58:107:256:54
6:54
#7818
40K
24.85 mi13:31:183:04:067:245:56
6:56
#7594
25.2M
25.20 mi13:33:473:06:357:242:29
7:12
#7492
Finish
26.22 mi13:40:453:13:337:236:58
6:50
#7310
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi8620736173617586(Top 28%)6648(Top 44%)6648(Top 295%)
10K6.21 mi3.10 mi8089+5317011+3507011+3507574(Top 28%)6654(Top 44%)6654(Top 295%)
15K9.32 mi3.11 mi7898+1916889+1226889+1227586(Top 28%)6648(Top 44%)6648(Top 295%)
20K12.43 mi3.11 mi8093-1957001-1127001-1128946(Top 34%)7465(Top 49%)7465(Top 331%)
Half13.11 mi0.68 mi8090+36996+56996+58345(Top 31%)7086(Top 47%)7086(Top 315%)
25K15.53 mi2.42 mi8249-1597070-747070-749437(Top 35%)7669(Top 51%)7669(Top 341%)
30K18.64 mi3.11 mi8296-477057+137057+138877(Top 33%)7204(Top 47%)7204(Top 320%)
20M20.00 mi1.36 mi8151+1456951+1066951+1066629(Top 25%)5717(Top 38%)5717(Top 254%)
21M21.00 mi1.00 mi8281-1307018-677018-6710808(Top 41%)8008(Top 53%)8008(Top 356%)
35K21.75 mi0.75 mi8022+2596839+1796839+1792767(Top 10%)2595(Top 17%)2595(Top 115%)
23M23.00 mi1.25 mi8057-356841-26841-29090(Top 34%)6990(Top 46%)6990(Top 310%)
24M24.00 mi1.00 mi7818+2396668+1736668+1734211(Top 16%)3823(Top 25%)3823(Top 170%)
40K24.85 mi0.85 mi7594+2246511+1576511+1573579(Top 13%)3245(Top 21%)3245(Top 144%)
25.2M25.20 mi0.35 mi7492+1026428+836428+832623(Top 10%)2411(Top 16%)2411(Top 107%)
Finish26.22 mi1.02 mi7310+1826286+1426286+1424319(Top 16%)3777(Top 25%)3777(Top 168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

7586

Males

6648

M45-49

6648

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7574

Males

6654

M45-49

6654

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

7586

Males

6648

M45-49

6648

15K→20K

9.3 - 12.4 mi

Top 34%
×5story building
+106ft-86ft

Overall

8946

Males

7465

M45-49

7465

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8345

Males

7086

M45-49

7086

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9437

Males

7669

M45-49

7669

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8877

Males

7204

M45-49

7204

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

6629

Males

5717

M45-49

5717

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

10808

Males

8008

M45-49

8008

21M→35K

21.0 - 21.8 mi

Top 10%
×7story building
+17ft-86ft

Overall

2767

Males

2595

M45-49

2595

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

9090

Males

6990

M45-49

6990

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4211

Males

3823

M45-49

3823

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3579

Males

3245

M45-49

3245

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2623

Males

2411

M45-49

2411

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4319

Males

3777

M45-49

3777

Passing Analysis

Category:
Athletes Passed
2410
Passed By
1100
Net Change
+1310
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8620
5K → 10K59968+531#8620#8089
10K → 15K25059+191#8089#7898
15K → 20K74269-195#7898#8093
20K → Half2724+3#8093#8090
Half → 25K58217-159#8090#8249
25K → 30K128175-47#8249#8296
30K → 20M15712+145#8296#8151
20M → 21M32162-130#8151#8281
21M → 35K2590+259#8281#8022
35K → 23M71106-35#8022#8057
23M → 24M2401+239#8057#7818
24M → 40K2240+224#7818#7594
40K → 25.2M1020+102#7594#7492
25.2M → Finish1897+182#7492#7310
TOTALS24101100+1310
📊

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