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BOSTON MARATHON 2023

Thien-Nam To

Bib: 5227•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 12%
Gender (Male)
#0 / 15176
Top 20%
Division (M18-39)
#0 / 5285
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:13
Rank: #2315
Start → 5K
20:13 | 6:30/mi
10K· 6.21 mi
39:48
Rank: #2008 (+307)
5K → 10K
19:35 | 6:18/mi
15K· 9.32 mi
1:00:01
Rank: #2200 (-192)
10K → 15K
20:13 | 6:30/mi
20K· 12.43 mi
1:20:58
Rank: #2539 (-339)
15K → 20K
20:57 | 6:45/mi
Half· 13.11 mi
1:25:37
Rank: #2639 (-100)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:42:01
Rank: #2788 (-149)
Half → 25K
16:24 | 6:46/mi
30K· 18.64 mi
2:04:09
Rank: #3115 (-327)
25K → 30K
22:08 | 7:07/mi
20M
2:13:57
Rank: #3273 (-158)
30K → 20M
9:48 | 7:13/mi
21M
2:21:34
Rank: #3368 (-95)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:26:43
Rank: #3413 (-45)
21M → 35K
5:09 | 6:53/mi
23M
2:35:35
Rank: #3449 (-36)
35K → 23M
8:52 | 7:05/mi
24M
2:42:20
Rank: #3433 (+16)
23M → 24M
6:45 | 6:45/mi
40K· 24.85 mi
2:48:15
Rank: #3413 (+20)
24M → 40K
5:55 | 6:55/mi
25.2M
2:50:46
Rank: #3400 (+13)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:57:04
Rank: #3210 (+190)
25.2M → Finish
6:18 | 6:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:37
Pace6:32 /mi
2nd Half
Distance13.11 mi
Time1:31:27
Pace6:59 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1120:136:3020:13
6:30
-
10K
6.21 mi10:43:4639:486:2419:35
6:18
-0:12
15K
9.32 mi11:03:591:00:016:2620:13
6:30
+0:12
20K
12.43 mi11:24:561:20:586:3120:57
6:45
+0:15
Half
13.11 mi11:29:351:25:376:324:39
6:49
+0:04
25K
15.53 mi11:45:591:42:016:3416:24
6:46
-0:03
30K
18.64 mi12:08:072:04:096:4022:08
7:07
+0:21
20M
20.00 mi12:17:552:13:576:429:48
7:13
+0:06
21M
21.00 mi12:25:322:21:346:447:37
7:37
+0:24
35K
21.75 mi12:30:412:26:436:455:09
6:53
-0:44
23M
23.00 mi12:39:332:35:356:468:52
7:05
+0:12
24M
24.00 mi12:46:182:42:206:466:45
6:45
-0:20
40K
24.85 mi12:52:132:48:156:465:55
6:55
+0:10
25.2M
25.20 mi12:54:442:50:466:472:31
7:18
+0:23
Finish
26.22 mi13:01:022:57:046:456:18
6:11
-1:07

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

6:11 /mi

Average Pace

6:45 /mi

Slowest Pace

7:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:19

37% of race

Time at Steady Pace

59:49

34% of race

Time at Slower Pace

50:56

29% of race

Average Pace: 6:45 /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 mi10:24:1120:136:3020:13
6:30
#2315
10K
6.21 mi10:43:4639:486:2419:35
6:18
#2008
15K
9.32 mi11:03:591:00:016:2620:13
6:30
#2200
20K
12.43 mi11:24:561:20:586:3120:57
6:45
#2539
Half
13.11 mi11:29:351:25:376:324:39
6:49
#2639
25K
15.53 mi11:45:591:42:016:3416:24
6:46
#2788
30K
18.64 mi12:08:072:04:096:4022:08
7:07
#3115
20M
20.00 mi12:17:552:13:576:429:48
7:13
#3273
21M
21.00 mi12:25:322:21:346:447:37
7:37
#3368
35K
21.75 mi12:30:412:26:436:455:09
6:53
#3413
23M
23.00 mi12:39:332:35:356:468:52
7:05
#3449
24M
24.00 mi12:46:182:42:206:466:45
6:45
#3433
40K
24.85 mi12:52:132:48:156:465:55
6:55
#3413
25.2M
25.20 mi12:54:442:50:466:472:31
7:18
#3400
Finish
26.22 mi13:01:022:57:046:456:18
6:11
#3210
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2315220722072680(Top 10%)2561(Top 17%)2561(Top 48%)
10K6.21 mi3.10 mi2008+3071925+2821925+2821797(Top 7%)1719(Top 11%)1719(Top 33%)
15K9.32 mi3.11 mi2200-1922110-1852110-1852680(Top 10%)2561(Top 17%)2561(Top 48%)
20K12.43 mi3.11 mi2539-3392430-3202430-3203906(Top 15%)3680(Top 24%)3680(Top 70%)
Half13.11 mi0.68 mi2639-1002522-922522-925292(Top 20%)4875(Top 32%)4875(Top 92%)
25K15.53 mi2.42 mi2788-1492665-1432665-1433830(Top 14%)3602(Top 24%)3602(Top 68%)
30K18.64 mi3.11 mi3115-3272966-3012966-3015053(Top 19%)4642(Top 31%)4642(Top 88%)
20M20.00 mi1.36 mi3273-1583104-1383104-1385137(Top 19%)4644(Top 31%)4644(Top 88%)
21M21.00 mi1.00 mi3368-953189-853189-855146(Top 19%)4571(Top 30%)4571(Top 86%)
35K21.75 mi0.75 mi3413-453230-413230-414644(Top 17%)4209(Top 28%)4209(Top 80%)
23M23.00 mi1.25 mi3449-363261-313261-314186(Top 16%)3829(Top 25%)3829(Top 72%)
24M24.00 mi1.00 mi3433+163244+173244+173361(Top 13%)3098(Top 20%)3098(Top 59%)
40K24.85 mi0.85 mi3413+203224+203224+203413(Top 13%)3114(Top 21%)3114(Top 59%)
25.2M25.20 mi0.35 mi3400+133211+133211+132927(Top 11%)2682(Top 18%)2682(Top 51%)
Finish26.22 mi1.02 mi3210+1903036+1753036+1751229(Top 5%)1170(Top 8%)1170(Top 22%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2680

Males

2561

M18-39

2561

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

1797

Males

1719

M18-39

1719

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2680

Males

2561

M18-39

2561

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3906

Males

3680

M18-39

3680

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5292

Males

4875

M18-39

4875

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3830

Males

3602

M18-39

3602

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5053

Males

4642

M18-39

4642

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5137

Males

4644

M18-39

4644

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5146

Males

4571

M18-39

4571

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4644

Males

4209

M18-39

4209

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4186

Males

3829

M18-39

3829

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3361

Males

3098

M18-39

3098

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3413

Males

3114

M18-39

3114

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2927

Males

2682

M18-39

2682

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1229

Males

1170

M18-39

1170

Passing Analysis

Category:
Athletes Passed
828
Passed By
1723
Net Change
-895
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2315
5K → 10K32518+307#2315#2008
10K → 15K20212-192#2008#2200
15K → 20K13352-339#2200#2539
20K → Half1101-100#2539#2639
Half → 25K20169-149#2639#2788
25K → 30K24351-327#2788#3115
30K → 20M20178-158#3115#3273
20M → 21M25120-95#3273#3368
21M → 35K1964-45#3368#3413
35K → 23M4581-36#3413#3449
23M → 24M4832+16#3449#3433
24M → 40K4929+20#3433#3413
40K → 25.2M2613+13#3413#3400
25.2M → Finish1933+190#3400#3210
TOTALS8281723-895
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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