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BOSTON MARATHON 2023

Matthew Choi

Bib: 5149•M

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0:00
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Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
21:46
Rank: #6289
Start → 5K
21:46 | 7:00/mi
10K· 6.21 mi
44:02
Rank: #7018 (-729)
5K → 10K
22:16 | 7:10/mi
15K· 9.32 mi
1:06:32
Rank: #7345 (-327)
10K → 15K
22:30 | 7:15/mi
20K· 12.43 mi
1:29:34
Rank: #7597 (-252)
15K → 20K
23:02 | 7:25/mi
Half· 13.11 mi
1:34:47
Rank: #7765 (-168)
20K → Half
5:13 | 7:39/mi
25K· 15.53 mi
1:53:44
Rank: #8232 (-467)
Half → 25K
18:57 | 7:49/mi
30K· 18.64 mi
2:19:31
Rank: #9045 (-813)
25K → 30K
25:47 | 8:18/mi
20M
2:30:16
Rank: #9051 (-6)
30K → 20M
10:45 | 7:55/mi
21M
2:39:46
Rank: #9494 (-443)
20M → 21M
9:30 | 9:30/mi
35K· 21.75 mi
2:45:53
Rank: #9622 (-128)
21M → 35K
6:07 | 8:11/mi
23M
3:00:09
Rank: #11056 (-1434)
35K → 23M
14:16 | 11:24/mi
24M
3:07:53
Rank: #10961 (+95)
23M → 24M
7:44 | 7:44/mi
40K· 24.85 mi
3:14:36
Rank: #10869 (+92)
24M → 40K
6:43 | 7:51/mi
25.2M
3:17:25
Rank: #10797 (+72)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:24:53
Rank: #10610 (+187)
25.2M → Finish
7:28 | 7:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:47
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time1:50:06
Pace8:24 /mi
📊Positive Split: 16.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5121:467:0021:46
7:00
-
10K
6.21 mi10:47:0744:027:0522:16
7:10
+0:10
15K
9.32 mi11:09:371:06:327:0822:30
7:15
+0:05
20K
12.43 mi11:32:391:29:347:1223:02
7:25
+0:10
Half
13.11 mi11:37:521:34:477:145:13
7:39
+0:14
25K
15.53 mi11:56:491:53:447:1918:57
7:49
+0:10
30K
18.64 mi12:22:362:19:317:2925:47
8:18
+0:29
20M
20.00 mi12:33:212:30:167:3110:45
7:55
-0:23
21M
21.00 mi12:42:512:39:467:369:30
9:30
+1:35
35K
21.75 mi12:48:582:45:537:386:07
8:11
-1:19
23M
23.00 mi13:03:143:00:097:5014:16
11:24
+3:13
24M
24.00 mi13:10:583:07:537:507:44
7:44
-3:40
40K
24.85 mi13:17:413:14:367:506:43
7:51
+0:07
25.2M
25.20 mi13:20:303:17:257:502:49
8:10
+0:19
Finish
26.22 mi13:27:583:24:537:497:28
7:20
-0:50

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

7:00 /mi

Average Pace

7:49 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:06:32

32% of race

Time at Steady Pace

1:54:35

56% of race

Time at Slower Pace

23:46

12% of race

Average Pace: 7:49 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:24:5121:467:0021:46
7:00
#6289
10K
6.21 mi10:47:0744:027:0522:16
7:10
#7018
15K
9.32 mi11:09:371:06:327:0822:30
7:15
#7345
20K
12.43 mi11:32:391:29:347:1223:02
7:25
#7597
Half
13.11 mi11:37:521:34:477:145:13
7:39
#7765
25K
15.53 mi11:56:491:53:447:1918:57
7:49
#8232
30K
18.64 mi12:22:362:19:317:2925:47
8:18
#9045
20M
20.00 mi12:33:212:30:167:3110:45
7:55
#9051
21M
21.00 mi12:42:512:39:467:369:30
9:30
#9494
35K
21.75 mi12:48:582:45:537:386:07
8:11
#9622
23M
23.00 mi13:03:143:00:097:5014:16
11:24
#11056
24M
24.00 mi13:10:583:07:537:507:44
7:44
#10961
40K
24.85 mi13:17:413:14:367:506:43
7:51
#10869
25.2M
25.20 mi13:20:303:17:257:502:49
8:10
#10797
Finish
26.22 mi13:27:583:24:537:497:28
7:20
#10610
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6289573057308099(Top 30%)6986(Top 46%)6986(Top 132%)
10K6.21 mi3.10 mi7018-7296270-5406270-5407879(Top 30%)6859(Top 45%)6859(Top 130%)
15K9.32 mi3.11 mi7345-3276511-2416511-2418099(Top 30%)6986(Top 46%)6986(Top 132%)
20K12.43 mi3.11 mi7597-2526671-1606671-1608618(Top 32%)7272(Top 48%)7272(Top 138%)
Half13.11 mi0.68 mi7765-1686780-1096780-10911342(Top 43%)8775(Top 58%)8775(Top 166%)
25K15.53 mi2.42 mi8232-4677063-2837063-28311199(Top 42%)8589(Top 57%)8589(Top 163%)
30K18.64 mi3.11 mi9045-8137530-4677530-46713013(Top 49%)9227(Top 61%)9227(Top 175%)
20M20.00 mi1.36 mi9051-67513+177513+179627(Top 36%)7543(Top 50%)7543(Top 143%)
21M21.00 mi1.00 mi9494-4437752-2397752-23915931(Top 60%)10315(Top 68%)10315(Top 195%)
35K21.75 mi0.75 mi9622-1287819-677819-6713230(Top 50%)9071(Top 60%)9071(Top 172%)
23M23.00 mi1.25 mi11056-14348519-7008519-70023048(Top 87%)13408(Top 88%)13408(Top 254%)
24M24.00 mi1.00 mi10961+958442+778442+779290(Top 35%)7042(Top 46%)7042(Top 133%)
40K24.85 mi0.85 mi10869+928365+778365+779022(Top 34%)6832(Top 45%)6832(Top 129%)
25.2M25.20 mi0.35 mi10797+728319+468319+467505(Top 28%)5905(Top 39%)5905(Top 112%)
Finish26.22 mi1.02 mi10610+1878200+1198200+1197305(Top 27%)5760(Top 38%)5760(Top 109%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

8099

Males

6986

M18-39

6986

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

7879

Males

6859

M18-39

6859

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

8099

Males

6986

M18-39

6986

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

8618

Males

7272

M18-39

7272

20K→Half

12.4 - 13.1 mi

Top 43%
×2stories
+19ft-37ft

Overall

11342

Males

8775

M18-39

8775

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

11199

Males

8589

M18-39

8589

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13013

Males

9227

M18-39

9227

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9627

Males

7543

M18-39

7543

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

15931

Males

10315

M18-39

10315

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

13230

Males

9071

M18-39

9071

35K→23M

21.8 - 23.0 mi

Top 87%
×5stories
+23ft-63ft

Overall

23048

Males

13408

M18-39

13408

23M→24M

23.0 - 24.0 mi

Top 35%
×6stories
+12ft-82ft

Overall

9290

Males

7042

M18-39

7042

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9022

Males

6832

M18-39

6832

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7505

Males

5905

M18-39

5905

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2stories
+22ft-21ft

Overall

7305

Males

5760

M18-39

5760

Passing Analysis

Category:
Athletes Passed
805
Passed By
5124
Net Change
-4321
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6289
5K → 10K19748-729#6289#7018
10K → 15K45372-327#7018#7345
15K → 20K51303-252#7345#7597
20K → Half7175-168#7597#7765
Half → 25K17484-467#7765#8232
25K → 30K34847-813#8232#9045
30K → 20M8894-6#9045#9051
20M → 21M18461-443#9051#9494
21M → 35K18146-128#9494#9622
35K → 23M31435-1434#9622#11056
23M → 24M12025+95#11056#10961
24M → 40K11321+92#10961#10869
40K → 25.2M764+72#10869#10797
25.2M → Finish1969+187#10797#10610
TOTALS8055124-4321
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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