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BOSTON MARATHON 2023

Dan Liu

Bib: 11358•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 38%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 42%
Division (M55-59)
#0 / 1422
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:13
Rank: #9388
Start → 5K
23:13 | 7:28/mi
10K· 6.21 mi
46:16
Rank: #9544 (-156)
5K → 10K
23:03 | 7:25/mi
15K· 9.32 mi
1:09:18
Rank: #9480 (+64)
10K → 15K
23:02 | 7:25/mi
20K· 12.43 mi
1:32:59
Rank: #9670 (-190)
15K → 20K
23:41 | 7:37/mi
Half· 13.11 mi
1:38:05
Rank: #9679 (-9)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
1:56:48
Rank: #9804 (-125)
Half → 25K
18:43 | 7:43/mi
30K· 18.64 mi
2:21:23
Rank: #9849 (-45)
25K → 30K
24:35 | 7:55/mi
20M
2:32:19
Rank: #9861 (-12)
30K → 20M
10:56 | 8:03/mi
21M
2:40:51
Rank: #9894 (-33)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
2:46:53
Rank: #9968 (-74)
21M → 35K
6:02 | 8:04/mi
23M
2:57:12
Rank: #10033 (-65)
35K → 23M
10:19 | 8:14/mi
24M
3:05:15
Rank: #10097 (-64)
23M → 24M
8:03 | 8:03/mi
40K· 24.85 mi
3:12:31
Rank: #10187 (-90)
24M → 40K
7:16 | 8:30/mi
25.2M
3:15:28
Rank: #10176 (+11)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:23:12
Rank: #10102 (+74)
25.2M → Finish
7:44 | 7:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:05
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:45:07
Pace8:01 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:2223:137:2823:13
7:28
-
10K
6.21 mi11:16:2546:167:2723:03
7:25
-0:03
15K
9.32 mi11:39:271:09:187:2623:02
7:25
0:00
20K
12.43 mi12:03:081:32:597:2923:41
7:37
+0:12
Half
13.11 mi12:08:141:38:057:295:06
7:29
-0:08
25K
15.53 mi12:26:571:56:487:3118:43
7:43
+0:14
30K
18.64 mi12:51:322:21:237:3524:35
7:55
+0:12
20M
20.00 mi13:02:282:32:197:3710:56
8:03
+0:08
21M
21.00 mi13:11:002:40:517:408:32
8:32
+0:29
35K
21.75 mi13:17:022:46:537:406:02
8:04
-0:28
23M
23.00 mi13:27:212:57:127:4210:19
8:14
+0:10
24M
24.00 mi13:35:243:05:157:438:03
8:03
-0:11
40K
24.85 mi13:42:403:12:317:457:16
8:30
+0:27
25.2M
25.20 mi13:45:373:15:287:452:57
8:33
+0:03
Finish
26.22 mi13:53:213:23:127:457:44
7:35
-0:58

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

7:25 /mi

Average Pace

7:45 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:08

86% of race

Time at Steady Pace

29:04

14% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:45 /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 mi10:53:2223:137:2823:13
7:28
#9388
10K
6.21 mi11:16:2546:167:2723:03
7:25
#9544
15K
9.32 mi11:39:271:09:187:2623:02
7:25
#9480
20K
12.43 mi12:03:081:32:597:2923:41
7:37
#9670
Half
13.11 mi12:08:141:38:057:295:06
7:29
#9679
25K
15.53 mi12:26:571:56:487:3118:43
7:43
#9804
30K
18.64 mi12:51:322:21:237:3524:35
7:55
#9849
20M
20.00 mi13:02:282:32:197:3710:56
8:03
#9861
21M
21.00 mi13:11:002:40:517:408:32
8:32
#9894
35K
21.75 mi13:17:022:46:537:406:02
8:04
#9968
23M
23.00 mi13:27:212:57:127:4210:19
8:14
#10033
24M
24.00 mi13:35:243:05:157:438:03
8:03
#10097
40K
24.85 mi13:42:403:12:317:457:16
8:30
#10187
25.2M
25.20 mi13:45:373:15:287:452:57
8:33
#10176
Finish
26.22 mi13:53:213:23:127:457:44
7:35
#10102
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi9388780578059445(Top 35%)7833(Top 52%)7833(Top 551%)
10K6.21 mi3.10 mi9544-1567902-977902-979791(Top 37%)8053(Top 53%)8053(Top 566%)
15K9.32 mi3.11 mi9480+647861+417861+419445(Top 35%)7833(Top 52%)7833(Top 551%)
20K12.43 mi3.11 mi9670-1907966-1057966-10510249(Top 38%)8210(Top 54%)8210(Top 577%)
Half13.11 mi0.68 mi9679-97970-47970-49985(Top 38%)8095(Top 53%)8095(Top 569%)
25K15.53 mi2.42 mi9804-1258025-558025-5510435(Top 39%)8219(Top 54%)8219(Top 578%)
30K18.64 mi3.11 mi9849-458013+128013+1210218(Top 38%)7939(Top 52%)7939(Top 558%)
20M20.00 mi1.36 mi9861-127992+217992+2110577(Top 40%)8033(Top 53%)8033(Top 565%)
21M21.00 mi1.00 mi9894-337984+87984+810658(Top 40%)7938(Top 52%)7938(Top 558%)
35K21.75 mi0.75 mi9968-748003-198003-1912529(Top 47%)8780(Top 58%)8780(Top 617%)
23M23.00 mi1.25 mi10033-658013-108013-1011442(Top 43%)8189(Top 54%)8189(Top 576%)
24M24.00 mi1.00 mi10097-648011+28011+211552(Top 43%)8175(Top 54%)8175(Top 575%)
40K24.85 mi0.85 mi10187-908034-238034-2313283(Top 50%)8901(Top 59%)8901(Top 626%)
25.2M25.20 mi0.35 mi10176+118017+178017+179819(Top 37%)7205(Top 47%)7205(Top 507%)
Finish26.22 mi1.02 mi10102+747939+787939+789188(Top 35%)6858(Top 45%)6858(Top 482%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9445

Males

7833

M55-59

7833

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

9791

Males

8053

M55-59

8053

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9445

Males

7833

M55-59

7833

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10249

Males

8210

M55-59

8210

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

9985

Males

8095

M55-59

8095

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10435

Males

8219

M55-59

8219

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10218

Males

7939

M55-59

7939

30K→20M

18.6 - 20.0 mi

Top 40%
×5stories
+64ft-50ft

Overall

10577

Males

8033

M55-59

8033

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

10658

Males

7938

M55-59

7938

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

12529

Males

8780

M55-59

8780

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

11442

Males

8189

M55-59

8189

23M→24M

23.0 - 24.0 mi

Top 43%
×6stories
+12ft-82ft

Overall

11552

Males

8175

M55-59

8175

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13283

Males

8901

M55-59

8901

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9819

Males

7205

M55-59

7205

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9188

Males

6858

M55-59

6858

Passing Analysis

Category:
Athletes Passed
1235*
Passed By
1946
Net Change
-714
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9388
5K → 10K218374-156#9388#9544
10K → 15K190126+64#9544#9480
15K → 20K91281-190#9480#9670
20K → Half1827-9#9670#9679
Half → 25K90215-125#9679#9804
25K → 30K143*188-45#9804#9849
30K → 20M89101-12#9849#9861
20M → 21M74106-33#9861#9894
21M → 35K2397-74#9894#9968
35K → 23M50114-65#9968#10033
23M → 24M53116-64#10033#10097
24M → 40K49139-90#10097#10187
40K → 25.2M34*23+11#10187#10176
25.2M → Finish11339+74#10176#10102
TOTALS1235*1946-714

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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