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BOSTON MARATHON 2023

David Mercer

Bib: 19638•M

AB

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:27
Rank: #17632
Start → 5K
26:27 | 8:31/mi
10K· 6.21 mi
53:12
Rank: #18263 (-631)
5K → 10K
26:45 | 8:37/mi
15K· 9.32 mi
1:20:14
Rank: #18517 (-254)
10K → 15K
27:02 | 8:42/mi
20K· 12.43 mi
1:47:11
Rank: #18349 (+168)
15K → 20K
26:57 | 8:40/mi
Half· 13.11 mi
1:53:04
Rank: #18347 (+2)
20K → Half
5:53 | 8:37/mi
25K· 15.53 mi
2:13:48
Rank: #18034 (+313)
Half → 25K
20:44 | 8:33/mi
30K· 18.64 mi
2:41:42
Rank: #17805 (+229)
25K → 30K
27:54 | 8:59/mi
20M
2:53:45
Rank: #17641 (+164)
30K → 20M
12:03 | 8:52/mi
21M
3:03:10
Rank: #17507 (+134)
20M → 21M
9:25 | 9:25/mi
35K· 21.75 mi
3:09:13
Rank: #17338 (+169)
21M → 35K
6:03 | 8:05/mi
23M
3:19:47
Rank: #17085 (+253)
35K → 23M
10:34 | 8:26/mi
24M
3:28:05
Rank: #16925 (+160)
23M → 24M
8:18 | 8:18/mi
40K· 24.85 mi
3:35:20
Rank: #16785 (+140)
24M → 40K
7:15 | 8:29/mi
25.2M
3:38:32
Rank: #16730 (+55)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:47:07
Rank: #16645 (+85)
25.2M → Finish
8:35 | 8:25/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:53:04
Pace8:37 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:54:03
Pace8:42 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0126:278:3126:27
8:31
-
10K
6.21 mi11:49:4653:128:3426:45
8:37
+0:06
15K
9.32 mi12:16:481:20:148:3627:02
8:42
+0:05
20K
12.43 mi12:43:451:47:118:3726:57
8:40
-0:02
Half
13.11 mi12:49:381:53:048:375:53
8:37
-0:03
25K
15.53 mi13:10:222:13:488:3720:44
8:33
-0:04
30K
18.64 mi13:38:162:41:428:4027:54
8:59
+0:26
20M
20.00 mi13:50:192:53:458:4112:03
8:52
-0:07
21M
21.00 mi13:59:443:03:108:439:25
9:25
+0:33
35K
21.75 mi14:05:473:09:138:426:03
8:05
-1:20
23M
23.00 mi14:16:213:19:478:4110:34
8:26
+0:21
24M
24.00 mi14:24:393:28:058:408:18
8:18
-0:08
40K
24.85 mi14:31:543:35:208:407:15
8:29
+0:11
25.2M
25.20 mi14:35:063:38:328:403:12
9:17
+0:48
Finish
26.22 mi14:43:413:47:078:408:35
8:25
-0:52

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

8:05 /mi

Average Pace

8:40 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:36

82% of race

Time at Steady Pace

40:31

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:40 /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 mi11:23:0126:278:3126:27
8:31
#17632
10K
6.21 mi11:49:4653:128:3426:45
8:37
#18263
15K
9.32 mi12:16:481:20:148:3627:02
8:42
#18517
20K
12.43 mi12:43:451:47:118:3726:57
8:40
#18349
Half
13.11 mi12:49:381:53:048:375:53
8:37
#18347
25K
15.53 mi13:10:222:13:488:3720:44
8:33
#18034
30K
18.64 mi13:38:162:41:428:4027:54
8:59
#17805
20M
20.00 mi13:50:192:53:458:4112:03
8:52
#17641
21M
21.00 mi13:59:443:03:108:439:25
9:25
#17507
35K
21.75 mi14:05:473:09:138:426:03
8:05
#17338
23M
23.00 mi14:16:213:19:478:4110:34
8:26
#17085
24M
24.00 mi14:24:393:28:058:408:18
8:18
#16925
40K
24.85 mi14:31:543:35:208:407:15
8:29
#16785
25.2M
25.20 mi14:35:063:38:328:403:12
9:17
#16730
Finish
26.22 mi14:43:413:47:078:408:35
8:25
#16645
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi17632112781127818972(Top 71%)11866(Top 78%)11866(Top 834%)
10K6.21 mi3.10 mi18263-63111567-28911567-28918884(Top 71%)11847(Top 78%)11847(Top 833%)
15K9.32 mi3.11 mi18517-25411668-10111668-10118972(Top 71%)11866(Top 78%)11866(Top 834%)
20K12.43 mi3.11 mi18349+16811608+6011608+6017948(Top 67%)11442(Top 75%)11442(Top 805%)
Half13.11 mi0.68 mi18347+211611-311611-318413(Top 69%)11652(Top 77%)11652(Top 819%)
25K15.53 mi2.42 mi18034+31311459+15211459+15216490(Top 62%)10756(Top 71%)10756(Top 756%)
30K18.64 mi3.11 mi17805+22911343+11611343+11617054(Top 64%)10938(Top 72%)10938(Top 769%)
20M20.00 mi1.36 mi17641+16411266+7711266+7715809(Top 59%)10337(Top 68%)10337(Top 727%)
21M21.00 mi1.00 mi17507+13411186+8011186+8015551(Top 58%)10160(Top 67%)10160(Top 714%)
35K21.75 mi0.75 mi17338+16911109+7711109+7712711(Top 48%)8875(Top 58%)8875(Top 624%)
23M23.00 mi1.25 mi17085+25310995+11410995+11412850(Top 48%)8856(Top 58%)8856(Top 623%)
24M24.00 mi1.00 mi16925+16010909+8610909+8613251(Top 50%)8985(Top 59%)8985(Top 632%)
40K24.85 mi0.85 mi16785+14010833+7610833+7613195(Top 50%)8880(Top 59%)8880(Top 624%)
25.2M25.20 mi0.35 mi16730+5510800+3310800+3314055(Top 53%)9273(Top 61%)9273(Top 652%)
Finish26.22 mi1.02 mi16645+8510758+4210758+4214878(Top 56%)9673(Top 64%)9673(Top 680%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21stories
+97ft-345ft

Overall

18972

Males

11866

M55-59

11866

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

18884

Males

11847

M55-59

11847

10K→15K

6.2 - 9.3 mi

Top 71%
×3stories
+67ft-78ft

Overall

18972

Males

11866

M55-59

11866

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

17948

Males

11442

M55-59

11442

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

18413

Males

11652

M55-59

11652

Half→25K

13.1 - 15.5 mi

Top 62%
×4stories
+66ft-88ft

Overall

16490

Males

10756

M55-59

10756

25K→30K

15.5 - 18.6 mi

Top 64%
×9stories
+181ft-148ft

Overall

17054

Males

10938

M55-59

10938

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

15809

Males

10337

M55-59

10337

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

15551

Males

10160

M55-59

10160

21M→35K

21.0 - 21.8 mi

Top 48%
×7stories
+17ft-86ft

Overall

12711

Males

8875

M55-59

8875

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12850

Males

8856

M55-59

8856

23M→24M

23.0 - 24.0 mi

Top 50%
×6stories
+12ft-82ft

Overall

13251

Males

8985

M55-59

8985

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13195

Males

8880

M55-59

8880

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14055

Males

9273

M55-59

9273

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

14878

Males

9673

M55-59

9673

Passing Analysis

Category:
Athletes Passed
2360
Passed By
1373
Net Change
+987
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17632
5K → 10K98729-631#17632#18263
10K → 15K101355-254#18263#18517
15K → 20K24678+168#18517#18349
20K → Half3432+2#18349#18347
Half → 25K33017+313#18347#18034
25K → 30K30778+229#18034#17805
30K → 20M17814+164#17805#17641
20M → 21M16228+134#17641#17507
21M → 35K1723+169#17507#17338
35K → 23M2607+253#17338#17085
23M → 24M1633+160#17085#16925
24M → 40K1433+140#16925#16785
40K → 25.2M583+55#16785#16730
25.2M → Finish10823+85#16730#16645
TOTALS23601373+987
📊

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