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BOSTON MARATHON 2023

David Bailis

Bib: 8833•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 20%
Gender (Male)
#0 / 15176
Top 32%
Masters (Masters Men)
#0 / 9891
Top 18%
Division (M40-44)
#0 / 2241
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:01
Rank: #4318
Start → 5K
21:01 | 6:46/mi
10K· 6.21 mi
42:17
Rank: #5010 (-692)
5K → 10K
21:16 | 6:51/mi
15K· 9.32 mi
1:03:34
Rank: #5178 (-168)
10K → 15K
21:17 | 6:51/mi
20K· 12.43 mi
1:24:59
Rank: #5223 (-45)
15K → 20K
21:25 | 6:54/mi
Half· 13.11 mi
1:29:36
Rank: #5208 (+15)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:46:05
Rank: #4982 (+226)
Half → 25K
16:29 | 6:48/mi
30K· 18.64 mi
2:07:55
Rank: #4861 (+121)
25K → 30K
21:50 | 7:02/mi
20M
2:18:27
Rank: #5174 (-313)
30K → 20M
10:32 | 7:45/mi
21M
2:26:36
Rank: #5289 (-115)
20M → 21M
8:09 | 8:09/mi
35K· 21.75 mi
2:32:05
Rank: #5342 (-53)
21M → 35K
5:29 | 7:20/mi
23M
2:41:44
Rank: #5410 (-68)
35K → 23M
9:39 | 7:42/mi
24M
2:49:00
Rank: #5394 (+16)
23M → 24M
7:16 | 7:16/mi
40K· 24.85 mi
2:55:12
Rank: #5332 (+62)
24M → 40K
6:12 | 7:15/mi
25.2M
2:57:55
Rank: #5319 (+13)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
3:05:11
Rank: #5292 (+27)
25.2M → Finish
7:16 | 7:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:36
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:35:35
Pace7:17 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:2121:016:4621:01
6:46
-
10K
6.21 mi11:07:3742:176:4821:16
6:51
+0:05
15K
9.32 mi11:28:541:03:346:4921:17
6:51
0:00
20K
12.43 mi11:50:191:24:596:5021:25
6:54
+0:03
Half
13.11 mi11:54:561:29:366:504:37
6:46
-0:08
25K
15.53 mi12:11:251:46:056:5016:29
6:48
+0:02
30K
18.64 mi12:33:152:07:556:5221:50
7:02
+0:14
20M
20.00 mi12:43:472:18:276:5510:32
7:45
+0:43
21M
21.00 mi12:51:562:26:366:598:09
8:09
+0:24
35K
21.75 mi12:57:252:32:057:005:29
7:20
-0:49
23M
23.00 mi13:07:042:41:447:029:39
7:42
+0:22
24M
24.00 mi13:14:202:49:007:037:16
7:16
-0:26
40K
24.85 mi13:20:322:55:127:036:12
7:15
-0:01
25.2M
25.20 mi13:23:152:57:557:042:43
7:53
+0:38
Finish
26.22 mi13:30:313:05:117:047:16
7:08
-0:45

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

6:46 /mi

Average Pace

7:04 /mi

Slowest Pace

8:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:05

57% of race

Time at Steady Pace

48:03

26% of race

Time at Slower Pace

31:03

17% of race

Average Pace: 7:04 /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 mi10:46:2121:016:4621:01
6:46
#4318
10K
6.21 mi11:07:3742:176:4821:16
6:51
#5010
15K
9.32 mi11:28:541:03:346:4921:17
6:51
#5178
20K
12.43 mi11:50:191:24:596:5021:25
6:54
#5223
Half
13.11 mi11:54:561:29:366:504:37
6:46
#5208
25K
15.53 mi12:11:251:46:056:5016:29
6:48
#4982
30K
18.64 mi12:33:152:07:556:5221:50
7:02
#4861
20M
20.00 mi12:43:472:18:276:5510:32
7:45
#5174
21M
21.00 mi12:51:562:26:366:598:09
8:09
#5289
35K
21.75 mi12:57:252:32:057:005:29
7:20
#5342
23M
23.00 mi13:07:042:41:447:029:39
7:42
#5410
24M
24.00 mi13:14:202:49:007:037:16
7:16
#5394
40K
24.85 mi13:20:322:55:127:036:12
7:15
#5332
25.2M
25.20 mi13:23:152:57:557:042:43
7:53
#5319
Finish
26.22 mi13:30:313:05:117:047:16
7:08
#5292
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4318403640365568(Top 21%)5122(Top 34%)5122(Top 229%)
10K6.21 mi3.10 mi5010-6924647-6114647-6115697(Top 21%)5218(Top 34%)5218(Top 233%)
15K9.32 mi3.11 mi5178-1684800-1534800-1535568(Top 21%)5122(Top 34%)5122(Top 229%)
20K12.43 mi3.11 mi5223-454842-424842-425295(Top 20%)4888(Top 32%)4888(Top 218%)
Half13.11 mi0.68 mi5208+154829+134829+135007(Top 19%)4639(Top 31%)4639(Top 207%)
25K15.53 mi2.42 mi4982+2264629+2004629+2004148(Top 16%)3888(Top 26%)3888(Top 173%)
30K18.64 mi3.11 mi4861+1214522+1074522+1074536(Top 17%)4200(Top 28%)4200(Top 187%)
20M20.00 mi1.36 mi5174-3134785-2634785-2638479(Top 32%)6871(Top 45%)6871(Top 307%)
21M21.00 mi1.00 mi5289-1154872-874872-878256(Top 31%)6608(Top 44%)6608(Top 295%)
35K21.75 mi0.75 mi5342-534912-404912-407266(Top 27%)6039(Top 40%)6039(Top 269%)
23M23.00 mi1.25 mi5410-684959-474959-477729(Top 29%)6254(Top 41%)6254(Top 279%)
24M24.00 mi1.00 mi5394+164937+224937+226124(Top 23%)5171(Top 34%)5171(Top 231%)
40K24.85 mi0.85 mi5332+624876+614876+615142(Top 19%)4438(Top 29%)4438(Top 198%)
25.2M25.20 mi0.35 mi5319+134858+184858+185740(Top 22%)4760(Top 31%)4760(Top 212%)
Finish26.22 mi1.02 mi5292+274836+224836+225969(Top 22%)4908(Top 32%)4908(Top 219%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21stories
+97ft-345ft

Overall

5568

Males

5122

M40-44

5122

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

5697

Males

5218

M40-44

5218

10K→15K

6.2 - 9.3 mi

Top 21%
×3stories
+67ft-78ft

Overall

5568

Males

5122

M40-44

5122

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5295

Males

4888

M40-44

4888

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5007

Males

4639

M40-44

4639

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4148

Males

3888

M40-44

3888

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4536

Males

4200

M40-44

4200

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8479

Males

6871

M40-44

6871

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8256

Males

6608

M40-44

6608

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7266

Males

6039

M40-44

6039

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

7729

Males

6254

M40-44

6254

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6124

Males

5171

M40-44

5171

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5142

Males

4438

M40-44

4438

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

5740

Males

4760

M40-44

4760

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5969

Males

4908

M40-44

4908

Passing Analysis

Category:
Athletes Passed
979
Passed By
1953
Net Change
-974
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4318
5K → 10K34726-692#4318#5010
10K → 15K54222-168#5010#5178
15K → 20K96141-45#5178#5223
20K → Half3015+15#5223#5208
Half → 25K23610+226#5208#4982
25K → 30K20180+121#4982#4861
30K → 20M17330-313#4861#5174
20M → 21M22137-115#5174#5289
21M → 35K1972-53#5289#5342
35K → 23M45113-68#5342#5410
23M → 24M5741+16#5410#5394
24M → 40K7816+62#5394#5332
40K → 25.2M2815+13#5332#5319
25.2M → Finish6235+27#5319#5292
TOTALS9791953-974
📊

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