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BOSTON MARATHON 2023

Michael Brierley

Bib: 31574•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:34
Rank: #17911
Start → 5K
8:33/mi
26:34 split
10K· 6.21 mi
52:53
Rank: #17966 (-55)
5K → 10K
8:28/mi
26:19 split
15K· 9.32 mi
1:19:41
Rank: #18165 (-199)
10K → 15K
8:38/mi
26:48 split
20K· 12.43 mi
1:47:15
Rank: #18385 (-220)
15K → 20K
8:52/mi
27:34 split
Half· 13.11 mi
1:53:16
Rank: #18446 (-61)
20K → Half
8:49/mi
6:01 split
25K· 15.53 mi
2:16:13
Rank: #18940 (-494)
Half → 25K
9:28/mi
22:57 split
30K· 18.64 mi
2:47:25
Rank: #19500 (-560)
25K → 30K
10:03/mi
31:12 split
20M
3:01:18
Rank: #19667 (-167)
30K → 20M
10:13/mi
13:53 split
21M
3:12:41
Rank: #19835 (-168)
20M → 21M
11:23/mi
11:23 split
35K· 21.75 mi
3:21:01
Rank: #20086 (-251)
21M → 35K
11:08/mi
8:20 split
23M
3:34:16
Rank: #20182 (-96)
35K → 23M
10:35/mi
13:15 split
24M
3:45:02
Rank: #20322 (-140)
23M → 24M
10:46/mi
10:46 split
40K· 24.85 mi
3:55:35
Rank: #20573 (-251)
24M → 40K
12:20/mi
10:33 split
25.2M
3:59:32
Rank: #20587 (-14)
40K → 25.2M
11:27/mi
3:57 split
Finish· 26.22 mi
4:09:49
Rank: #20638 (-51)
25.2M → Finish
10:05/mi
10:17 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:16
Pace8:38 /mi
2nd Half
Distance13.11 mi
Time2:16:33
Pace10:25 /mi
📊Positive Split: 20.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1026:348:3326:34
8:33
-
10K
6.21 mi12:12:2952:538:3126:19
8:28
-0:05
15K
9.32 mi12:39:171:19:418:3326:48
8:38
+0:10
20K
12.43 mi13:06:511:47:158:3827:34
8:52
+0:14
Half
13.11 mi13:12:521:53:168:386:01
8:49
-0:03
25K
15.53 mi13:35:492:16:138:4622:57
9:28
+0:39
30K
18.64 mi14:07:012:47:258:5931:12
10:03
+0:35
20M
20.00 mi14:20:543:01:189:0413:53
10:13
+0:10
21M
21.00 mi14:32:173:12:419:1111:23
11:23
+1:10
35K
21.75 mi14:40:373:21:019:158:20
11:08
-0:15
23M
23.00 mi14:53:523:34:169:1913:15
10:35
-0:33
24M
24.00 mi15:04:383:45:029:2310:46
10:46
+0:11
40K
24.85 mi15:15:113:55:359:2910:33
12:20
+1:34
25.2M
25.20 mi15:19:083:59:329:303:57
11:27
-0:53
Finish
26.22 mi15:29:254:09:499:3210:17
10:05
-1:22

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

8:28 /mi

Average Pace

9:32 /mi

Slowest Pace

12:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:13

55% of race

Time at Steady Pace

1:08:37

27% of race

Time at Slower Pace

44:59

18% of race

Average Pace: 9:32 /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 mi11:46:1026:348:3326:34
8:33
#17911
10K
6.21 mi12:12:2952:538:3126:19
8:28
#17966
15K
9.32 mi12:39:171:19:418:3326:48
8:38
#18165
20K
12.43 mi13:06:511:47:158:3827:34
8:52
#18385
Half
13.11 mi13:12:521:53:168:386:01
8:49
#18446
25K
15.53 mi13:35:492:16:138:4622:57
9:28
#18940
30K
18.64 mi14:07:012:47:258:5931:12
10:03
#19500
20M
20.00 mi14:20:543:01:189:0413:53
10:13
#19667
21M
21.00 mi14:32:173:12:419:1111:23
11:23
#19835
35K
21.75 mi14:40:373:21:019:158:20
11:08
#20086
23M
23.00 mi14:53:523:34:169:1913:15
10:35
#20182
24M
24.00 mi15:04:383:45:029:2310:46
10:46
#20322
40K
24.85 mi15:15:113:55:359:2910:33
12:20
#20573
25.2M
25.20 mi15:19:083:59:329:303:57
11:27
#20587
Finish
26.22 mi15:29:254:09:499:3210:17
10:05
#20638
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi17911114001140018596(Top 70%)11721(Top 77%)11721(Top 222%)
10K6.21 mi3.10 mi17966-5511431-3111431-3118059(Top 68%)11531(Top 76%)11531(Top 218%)
15K9.32 mi3.11 mi18165-19911520-8911520-8918596(Top 70%)11721(Top 77%)11721(Top 222%)
20K12.43 mi3.11 mi18385-22011622-10211622-10219075(Top 72%)11924(Top 79%)11924(Top 226%)
Half13.11 mi0.68 mi18446-6111652-3011652-3019581(Top 74%)12144(Top 80%)12144(Top 230%)
25K15.53 mi2.42 mi18940-49411833-18111833-18120724(Top 78%)12584(Top 83%)12584(Top 238%)
30K18.64 mi3.11 mi19500-56012052-21912052-21921142(Top 79%)12694(Top 84%)12694(Top 240%)
20M20.00 mi1.36 mi19667-16712109-5712109-5721053(Top 79%)12592(Top 83%)12592(Top 238%)
21M21.00 mi1.00 mi19835-16812169-6012169-6021651(Top 81%)12823(Top 84%)12823(Top 243%)
35K21.75 mi0.75 mi20086-25112259-9012259-9023536(Top 88%)13617(Top 90%)13617(Top 258%)
23M23.00 mi1.25 mi20182-9612290-3112290-3121495(Top 81%)12684(Top 84%)12684(Top 240%)
24M24.00 mi1.00 mi20322-14012344-5412344-5422592(Top 85%)13154(Top 87%)13154(Top 249%)
40K24.85 mi0.85 mi20573-25112434-9012434-9024261(Top 91%)13924(Top 92%)13924(Top 263%)
25.2M25.20 mi0.35 mi20587-1412442-812442-821431(Top 81%)12580(Top 83%)12580(Top 238%)
Finish26.22 mi1.02 mi20638-5112449-712449-721996(Top 83%)12858(Top 85%)12858(Top 243%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18596

Males

11721

M18-39

11721

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

18059

Males

11531

M18-39

11531

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18596

Males

11721

M18-39

11721

15K→20K

9.3 - 12.4 mi

Top 72%
×5stories
+106ft-86ft

Overall

19075

Males

11924

M18-39

11924

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

19581

Males

12144

M18-39

12144

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20724

Males

12584

M18-39

12584

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

21142

Males

12694

M18-39

12694

30K→20M

18.6 - 20.0 mi

Top 79%
×5stories
+64ft-50ft

Overall

21053

Males

12592

M18-39

12592

20M→21M

20.0 - 21.0 mi

Top 81%
×8stories
+106ft-24ft

Overall

21651

Males

12823

M18-39

12823

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

23536

Males

13617

M18-39

13617

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

21495

Males

12684

M18-39

12684

23M→24M

23.0 - 24.0 mi

Top 85%
×6stories
+12ft-82ft

Overall

22592

Males

13154

M18-39

13154

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

24261

Males

13924

M18-39

13924

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21431

Males

12580

M18-39

12580

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2stories
+22ft-21ft

Overall

21996

Males

12858

M18-39

12858

Passing Analysis

Category:
Athletes Passed
791
Passed By
3518
Net Change
-2727
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17911
5K → 10K287342-55#17911#17966
10K → 15K108307-199#17966#18165
15K → 20K101321-220#18165#18385
20K → Half1374-61#18385#18446
Half → 25K32526-494#18446#18940
25K → 30K46606-560#18940#19500
30K → 20M42209-167#19500#19667
20M → 21M43211-168#19667#19835
21M → 35K13264-251#19835#20086
35K → 23M46142-96#20086#20182
23M → 24M11151-140#20182#20322
24M → 40K6257-251#20322#20573
40K → 25.2M1529-14#20573#20587
25.2M → Finish2879-51#20587#20638
TOTALS7913518-2727
📊

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