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BOSTON MARATHON 2023

Reg Chow

Bib: 20980•M

BC

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
Top 27%
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
8:27/mi
26:15
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
52:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:24/mi
1:18:24
↑ 67↓ 78
20K· 12.43 mi
8:37/mi
1:45:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:23/mi
1:50:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:15/mi
2:10:52
↑ 66↓ 880.2%
30K· 18.64 mi
8:21/mi
2:36:47
↑ 181↓ 1480.2%
20M
8:20/mi
2:48:07
↑ 64↓ 500.2%
21M
8:44/mi
2:56:51
↑ 106↓ 241.6%
35K· 21.75 mi
7:49/mi
3:02:42
↑ 17↓ 861.7%
23M
8:02/mi
3:12:46
↑ 23↓ 630.6%
24M
7:49/mi
3:20:35
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:27:29
↓ 200.3%
25.2M
8:42/mi
3:30:29
↑ 13↓ 160.2%
Finish· 26.22 mi
7:40/mi
3:38:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:50:53
Pace8:27 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:47:25
Pace8:12 /mi
📊Negative Split: 3.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:5226:158:2726:15
8:27
-
10K
6.21 mi11:44:5652:198:2526:04
8:23
-0:04
15K
9.32 mi12:11:011:18:248:2526:05
8:24
+0:01
20K
12.43 mi12:37:471:45:108:2826:46
8:37
+0:13
Half
13.11 mi12:43:301:50:538:275:43
8:23
-0:14
25K
15.53 mi13:03:292:10:528:2519:59
8:15
-0:08
30K
18.64 mi13:29:242:36:478:2525:55
8:21
+0:06
20M
20.00 mi13:40:442:48:078:2411:20
8:20
-0:01
21M
21.00 mi13:49:282:56:518:258:44
8:44
+0:24
35K
21.75 mi13:55:193:02:428:245:51
7:49
-0:55
23M
23.00 mi14:05:233:12:468:2310:04
8:02
+0:13
24M
24.00 mi14:13:123:20:358:217:49
7:49
-0:13
40K
24.85 mi14:20:063:27:298:216:54
8:04
+0:15
25.2M
25.20 mi14:23:063:30:298:213:00
8:42
+0:38
Finish
26.22 mi14:30:553:38:188:207:49
7:40
-1:02

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

7:40 /mi

Average Pace

8:20 /mi

Slowest Pace

8:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:33

70% of race

Time at Steady Pace

1:04:45

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:20 /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 mi11:18:5226:158:2726:15
8:27
#17197
10K
6.21 mi11:44:5652:198:2526:04
8:23
#17333
15K
9.32 mi12:11:011:18:248:2526:05
8:24
#17266
20K
12.43 mi12:37:471:45:108:2826:46
8:37
#17329
Half
13.11 mi12:43:301:50:538:275:43
8:23
#17313
25K
15.53 mi13:03:292:10:528:2519:59
8:15
#16884
30K
18.64 mi13:29:242:36:478:2525:55
8:21
#16216
20M
20.00 mi13:40:442:48:078:2411:20
8:20
#15937
21M
21.00 mi13:49:282:56:518:258:44
8:44
#15672
35K
21.75 mi13:55:193:02:428:245:51
7:49
#15495
23M
23.00 mi14:05:233:12:468:2310:04
8:02
#15168
24M
24.00 mi14:13:123:20:358:217:49
7:49
#14947
40K
24.85 mi14:20:063:27:298:216:54
8:04
#14764
25.2M
25.20 mi14:23:063:30:298:213:00
8:42
#14687
Finish
26.22 mi14:30:553:38:188:207:49
7:40
#14499
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17197111111111117102(Top 64%)11092(Top 73%)11092(Top 999%)
10K6.21 mi3.10 mi17333-13611182-7111182-7117505(Top 66%)11297(Top 74%)11297(Top 1018%)
15K9.32 mi3.11 mi17266+6711171+1111171+1117102(Top 64%)11092(Top 73%)11092(Top 999%)
20K12.43 mi3.11 mi17329-6311183-1211183-1217579(Top 66%)11279(Top 74%)11279(Top 1016%)
Half13.11 mi0.68 mi17313+1611182+111182+116943(Top 64%)11041(Top 73%)11041(Top 995%)
25K15.53 mi2.42 mi16884+42910979+20310979+20314519(Top 55%)9972(Top 66%)9972(Top 898%)
30K18.64 mi3.11 mi16216+66810687+29210687+29213302(Top 50%)9367(Top 62%)9367(Top 844%)
20M20.00 mi1.36 mi15937+27910554+13310554+13312617(Top 47%)8959(Top 59%)8959(Top 807%)
21M21.00 mi1.00 mi15672+26510422+13210422+13211870(Top 45%)8531(Top 56%)8531(Top 769%)
35K21.75 mi0.75 mi15495+17710346+7610346+7610804(Top 41%)8027(Top 53%)8027(Top 723%)
23M23.00 mi1.25 mi15168+32710206+14010206+14010043(Top 38%)7512(Top 49%)7512(Top 677%)
24M24.00 mi1.00 mi14947+22110105+10110105+1019922(Top 37%)7368(Top 49%)7368(Top 664%)
40K24.85 mi0.85 mi14764+18310009+9610009+9610508(Top 39%)7620(Top 50%)7620(Top 686%)
25.2M25.20 mi0.35 mi14687+779966+439966+4310740(Top 40%)7697(Top 51%)7697(Top 693%)
Finish26.22 mi1.02 mi14499+1889884+829884+829784(Top 37%)7176(Top 47%)7176(Top 646%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

17102

Males

11092

M60-64

11092

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17505

Males

11297

M60-64

11297

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

17102

Males

11092

M60-64

11092

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17579

Males

11279

M60-64

11279

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16943

Males

11041

M60-64

11041

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14519

Males

9972

M60-64

9972

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

13302

Males

9367

M60-64

9367

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

12617

Males

8959

M60-64

8959

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

11870

Males

8531

M60-64

8531

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

10804

Males

8027

M60-64

8027

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10043

Males

7512

M60-64

7512

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9922

Males

7368

M60-64

7368

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

10508

Males

7620

M60-64

7620

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10740

Males

7697

M60-64

7697

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

9784

Males

7176

M60-64

7176

Passing Analysis

Category:
Athletes Passed
3504
Passed By
806
Net Change
+2698
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17197
5K → 10K258394-136#17197#17333
10K → 15K221154+67#17333#17266
15K → 20K147210-63#17266#17329
20K → Half4024+16#17329#17313
Half → 25K4345+429#17313#16884
25K → 30K6702+668#16884#16216
30K → 20M2812+279#16216#15937
20M → 21M2694+265#15937#15672
21M → 35K1770+177#15672#15495
35K → 23M3292+327#15495#15168
23M → 24M2221+221#15168#14947
24M → 40K1852+183#14947#14764
40K → 25.2M792+77#14764#14687
25.2M → Finish1924+188#14687#14499
TOTALS3504806+2698
📊

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