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BOSTON MARATHON 2023

John Brennan

Bib: 13005•M

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
Division (M45-49)
#0 / 2252
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
22:36
Rank: #7958
Start → 5K
22:36 | 7:16/mi
10K· 6.21 mi
44:54
Rank: #7936 (+22)
5K → 10K
22:18 | 7:11/mi
15K· 9.32 mi
1:07:21
Rank: #7945 (-9)
10K → 15K
22:27 | 7:14/mi
20K· 12.43 mi
1:30:09
Rank: #7925 (+20)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:35:08
Rank: #7955 (-30)
20K → Half
4:59 | 7:18/mi
25K· 15.53 mi
1:52:48
Rank: #7796 (+159)
Half → 25K
17:40 | 7:17/mi
30K· 18.64 mi
2:16:35
Rank: #7834 (-38)
25K → 30K
23:47 | 7:39/mi
20M
2:28:12
Rank: #8243 (-409)
30K → 20M
11:37 | 8:33/mi
21M
2:37:25
Rank: #8610 (-367)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
2:44:14
Rank: #9024 (-414)
21M → 35K
6:49 | 9:07/mi
23M
2:55:43
Rank: #9530 (-506)
35K → 23M
11:29 | 9:10/mi
24M
3:03:38
Rank: #9565 (-35)
23M → 24M
7:55 | 7:55/mi
40K· 24.85 mi
3:10:29
Rank: #9540 (+25)
24M → 40K
6:51 | 8:01/mi
25.2M
3:13:47
Rank: #9631 (-91)
40K → 25.2M
3:18 | 9:34/mi
Finish· 26.22 mi
3:22:22
Rank: #9842 (-211)
25.2M → Finish
8:35 | 8:25/mi

Course Map & Elevation

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:08
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:47:14
Pace8:11 /mi
📊Positive Split: 12.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3722:367:1622:36
7:16
-
10K
6.21 mi11:12:5544:547:1422:18
7:11
-0:05
15K
9.32 mi11:35:221:07:217:1422:27
7:14
+0:03
20K
12.43 mi11:58:101:30:097:1522:48
7:20
+0:06
Half
13.11 mi12:03:091:35:087:154:59
7:18
-0:02
25K
15.53 mi12:20:491:52:487:1617:40
7:17
-0:01
30K
18.64 mi12:44:362:16:357:2023:47
7:39
+0:22
20M
20.00 mi12:56:132:28:127:2511:37
8:33
+0:54
21M
21.00 mi13:05:262:37:257:309:13
9:13
+0:40
35K
21.75 mi13:12:152:44:147:336:49
9:07
-0:06
23M
23.00 mi13:23:442:55:437:3811:29
9:10
+0:03
24M
24.00 mi13:31:393:03:387:397:55
7:55
-1:15
40K
24.85 mi13:38:303:10:297:406:51
8:01
+0:06
25.2M
25.20 mi13:41:483:13:477:413:18
9:34
+1:33
Finish
26.22 mi13:50:233:22:227:438:35
8:25
-1:09

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

7:11 /mi

Average Pace

7:43 /mi

Slowest Pace

9:34 /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

1:52:48

56% of race

Time at Steady Pace

38:33

19% of race

Time at Slower Pace

51:01

25% of race

Average Pace: 7:43 /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 mi10:50:3722:367:1622:36
7:16
#7958
10K
6.21 mi11:12:5544:547:1422:18
7:11
#7936
15K
9.32 mi11:35:221:07:217:1422:27
7:14
#7945
20K
12.43 mi11:58:101:30:097:1522:48
7:20
#7925
Half
13.11 mi12:03:091:35:087:154:59
7:18
#7955
25K
15.53 mi12:20:491:52:487:1617:40
7:17
#7796
30K
18.64 mi12:44:362:16:357:2023:47
7:39
#7834
20M
20.00 mi12:56:132:28:127:2511:37
8:33
#8243
21M
21.00 mi13:05:262:37:257:309:13
9:13
#8610
35K
21.75 mi13:12:152:44:147:336:49
9:07
#9024
23M
23.00 mi13:23:442:55:437:3811:29
9:10
#9530
24M
24.00 mi13:31:393:03:387:397:55
7:55
#9565
40K
24.85 mi13:38:303:10:297:406:51
8:01
#9540
25.2M
25.20 mi13:41:483:13:477:413:18
9:34
#9631
Finish
26.22 mi13:50:233:22:227:438:35
8:25
#9842
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7958695069507974(Top 30%)6908(Top 46%)6908(Top 307%)
10K6.21 mi3.10 mi7936+226933+176933+177947(Top 30%)6903(Top 45%)6903(Top 307%)
15K9.32 mi3.11 mi7945-96920+136920+137974(Top 30%)6908(Top 46%)6908(Top 307%)
20K12.43 mi3.11 mi7925+206891+296891+298080(Top 30%)6944(Top 46%)6944(Top 308%)
Half13.11 mi0.68 mi7955-306904-136904-138637(Top 32%)7301(Top 48%)7301(Top 324%)
25K15.53 mi2.42 mi7796+1596785+1196785+1197214(Top 27%)6302(Top 42%)6302(Top 280%)
30K18.64 mi3.11 mi7834-386769+166769+168334(Top 31%)6886(Top 45%)6886(Top 306%)
20M20.00 mi1.36 mi8243-4097005-2367005-23613894(Top 52%)9519(Top 63%)9519(Top 423%)
21M21.00 mi1.00 mi8610-3677223-2187223-21814526(Top 55%)9722(Top 64%)9722(Top 432%)
35K21.75 mi0.75 mi9024-4147462-2397462-23918335(Top 69%)11281(Top 74%)11281(Top 501%)
23M23.00 mi1.25 mi9530-5067740-2787740-27816886(Top 63%)10633(Top 70%)10633(Top 472%)
24M24.00 mi1.00 mi9565-357728+127728+1210621(Top 40%)7717(Top 51%)7717(Top 343%)
40K24.85 mi0.85 mi9540+257685+437685+4310104(Top 38%)7385(Top 49%)7385(Top 328%)
25.2M25.20 mi0.35 mi9631-917717-327717-3215422(Top 58%)9843(Top 65%)9843(Top 437%)
Finish26.22 mi1.02 mi9842-2117806-897806-8914857(Top 56%)9652(Top 64%)9652(Top 429%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

7974

Males

6908

M45-49

6908

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

7947

Males

6903

M45-49

6903

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

7974

Males

6908

M45-49

6908

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8080

Males

6944

M45-49

6944

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8637

Males

7301

M45-49

7301

Half→25K

13.1 - 15.5 mi

Top 27%
×4stories
+66ft-88ft

Overall

7214

Males

6302

M45-49

6302

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8334

Males

6886

M45-49

6886

30K→20M

18.6 - 20.0 mi

Top 52%
×5stories
+64ft-50ft

Overall

13894

Males

9519

M45-49

9519

20M→21M

20.0 - 21.0 mi

Top 55%
×8stories
+106ft-24ft

Overall

14526

Males

9722

M45-49

9722

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

18335

Males

11281

M45-49

11281

35K→23M

21.8 - 23.0 mi

Top 63%
×5stories
+23ft-63ft

Overall

16886

Males

10633

M45-49

10633

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

10621

Males

7717

M45-49

7717

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10104

Males

7385

M45-49

7385

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15422

Males

9843

M45-49

9843

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

14857

Males

9652

M45-49

9652

Passing Analysis

Category:
Athletes Passed
1022*
Passed By
2906
Net Change
-1884
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7958
5K → 10K239217+22#7958#7936
10K → 15K136145-9#7936#7945
15K → 20K130110+20#7945#7925
20K → Half939-30#7925#7955
Half → 25K18223+159#7955#7796
25K → 30K122160-38#7796#7834
30K → 20M15424-409#7834#8243
20M → 21M14381-367#8243#8610
21M → 35K7421-414#8610#9024
35K → 23M13519-506#9024#9530
23M → 24M5085-35#9530#9565
24M → 40K72*47+25#9565#9540
40K → 25.2M15106-91#9540#9631
25.2M → Finish18229-211#9631#9842
TOTALS1022*2906-1884

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

📊

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