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BOSTON MARATHON 2023

Doo Suk Song

Bib: 21550•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
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
10:11/mi
31:39
↑ 97↓ 3451.5%
10K· 6.21 mi
9:23/mi
1:00:49
↑ 79↓ 1380.4%
15K· 9.32 mi
9:17/mi
1:29:40
↑ 67↓ 78
20K· 12.43 mi
9:44/mi
1:59:53
↑ 106↓ 860.1%
Half· 13.11 mi
9:40/mi
2:06:29
↑ 19↓ 370.5%
25K· 15.53 mi
10:26/mi
2:31:46
↑ 66↓ 880.2%
30K· 18.64 mi
11:03/mi
3:06:05
↑ 181↓ 1480.2%
20M
11:09/mi
3:21:14
↑ 64↓ 500.2%
21M
13:44/mi
3:34:58
↑ 106↓ 241.6%
35K· 21.75 mi
9:09/mi
3:41:49
↑ 17↓ 861.7%
23M
11:00/mi
3:55:35
↑ 23↓ 630.6%
24M
10:24/mi
4:05:59
↓ 821.3%
40K· 24.85 mi
10:51/mi
4:15:16
↓ 200.3%
25.2M
12:14/mi
4:19:29
↑ 13↓ 160.2%
Finish· 26.22 mi
10:46/mi
4:30:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:29
Pace9:39 /mi
2nd Half
Distance13.11 mi
Time2:23:58
Pace10:59 /mi
📊Positive Split: 13.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2031:3910:1131:39
10:11
-
10K
6.21 mi12:20:301:00:499:4729:10
9:23
-0:48
15K
9.32 mi12:49:211:29:409:3728:51
9:17
-0:06
20K
12.43 mi13:19:341:59:539:3930:13
9:44
+0:27
Half
13.11 mi13:26:102:06:299:396:36
9:40
-0:04
25K
15.53 mi13:51:272:31:469:4625:17
10:26
+0:46
30K
18.64 mi14:25:463:06:059:5934:19
11:03
+0:37
20M
20.00 mi14:40:553:21:1410:0415:09
11:09
+0:06
21M
21.00 mi14:54:393:34:5810:1413:44
13:44
+2:35
35K
21.75 mi15:01:303:41:4910:126:51
9:09
-4:35
23M
23.00 mi15:15:163:55:3510:1513:46
11:00
+1:51
24M
24.00 mi15:25:404:05:5910:1510:24
10:24
-0:36
40K
24.85 mi15:34:574:15:1610:169:17
10:51
+0:27
25.2M
25.20 mi15:39:104:19:2910:184:13
12:14
+1:23
Finish
26.22 mi15:50:084:30:2710:1910:58
10:46
-1:28

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

9:09 /mi

Average Pace

10:19 /mi

Slowest Pace

13:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:41

38% of race

Time at Steady Pace

1:41:21

37% of race

Time at Slower Pace

1:07:25

25% of race

Average Pace: 10:19 /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 mi11:51:2031:3910:1131:39
10:11
#23912
10K
6.21 mi12:20:301:00:499:4729:10
9:23
#23134
15K
9.32 mi12:49:211:29:409:3728:51
9:17
#22644
20K
12.43 mi13:19:341:59:539:3930:13
9:44
#22545
Half
13.11 mi13:26:102:06:299:396:36
9:40
#22545
25K
15.53 mi13:51:272:31:469:4625:17
10:26
#22641
30K
18.64 mi14:25:463:06:059:5934:19
11:03
#22763
20M
20.00 mi14:40:553:21:1410:0415:09
11:09
#22762
21M
21.00 mi14:54:393:34:5810:1413:44
13:44
#22959
35K
21.75 mi15:01:303:41:4910:126:51
9:09
#22844
23M
23.00 mi15:15:163:55:3510:1513:46
11:00
#22802
24M
24.00 mi15:25:404:05:5910:1510:24
10:24
#22757
40K
24.85 mi15:34:574:15:1610:169:17
10:51
#22728
25.2M
25.20 mi15:39:104:19:2910:184:13
12:14
#22726
Finish
26.22 mi15:50:084:30:2710:1910:58
10:46
#22766
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi23912140441404421591(Top 81%)13019(Top 86%)13019(Top 1173%)
10K6.21 mi3.10 mi23134+77813676+36813676+36822190(Top 83%)13251(Top 87%)13251(Top 1194%)
15K9.32 mi3.11 mi22644+49013463+21313463+21321591(Top 81%)13019(Top 86%)13019(Top 1173%)
20K12.43 mi3.11 mi22545+9913412+5113412+5122228(Top 83%)13286(Top 88%)13286(Top 1197%)
Half13.11 mi0.68 mi2254513407+513407+522575(Top 85%)13435(Top 89%)13435(Top 1210%)
25K15.53 mi2.42 mi22641-9613449-4213449-4223049(Top 87%)13609(Top 90%)13609(Top 1226%)
30K18.64 mi3.11 mi22763-12213475-2613475-2623158(Top 87%)13589(Top 90%)13589(Top 1224%)
20M20.00 mi1.36 mi22762+113473+213473+222938(Top 86%)13442(Top 89%)13442(Top 1211%)
21M21.00 mi1.00 mi22959-19713549-7613549-7624806(Top 93%)14276(Top 94%)14276(Top 1286%)
35K21.75 mi0.75 mi22844+11513491+5813491+5818566(Top 70%)11408(Top 75%)11408(Top 1028%)
23M23.00 mi1.25 mi22802+4213455+3613455+3622325(Top 84%)13075(Top 86%)13075(Top 1178%)
24M24.00 mi1.00 mi22757+4513428+2713428+2721797(Top 82%)12774(Top 84%)12774(Top 1151%)
40K24.85 mi0.85 mi22728+2913412+1613412+1622050(Top 83%)12856(Top 85%)12856(Top 1158%)
25.2M25.20 mi0.35 mi22726+213406+613406+622858(Top 86%)13256(Top 87%)13256(Top 1194%)
Finish26.22 mi1.02 mi22766-4013422-1613422-1623522(Top 88%)13580(Top 89%)13580(Top 1223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21591

Males

13019

M60-64

13019

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

22190

Males

13251

M60-64

13251

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21591

Males

13019

M60-64

13019

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

22228

Males

13286

M60-64

13286

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22575

Males

13435

M60-64

13435

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23049

Males

13609

M60-64

13609

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

23158

Males

13589

M60-64

13589

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22938

Males

13442

M60-64

13442

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

24806

Males

14276

M60-64

14276

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18566

Males

11408

M60-64

11408

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22325

Males

13075

M60-64

13075

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

21797

Males

12774

M60-64

12774

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22050

Males

12856

M60-64

12856

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

22858

Males

13256

M60-64

13256

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23522

Males

13580

M60-64

13580

Passing Analysis

Category:
Athletes Passed
2075
Passed By
929
Net Change
+1146
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23912
5K → 10K80325+778#23912#23134
10K → 15K50616+490#23134#22644
15K → 20K19192+99#22644#22545
20K → Half25250#22545#22545
Half → 25K64160-96#22545#22641
25K → 30K81203-122#22641#22763
30K → 20M6261+1#22763#22762
20M → 21M11208-197#22762#22959
21M → 35K1150+115#22959#22844
35K → 23M7735+42#22844#22802
23M → 24M5914+45#22802#22757
24M → 40K4314+29#22757#22728
40K → 25.2M1917+2#22728#22726
25.2M → Finish1959-40#22726#22766
TOTALS2075929+1146
📊

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