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BOSTON MARATHON 2023

Jason Lacroix

Bib: 29636•M

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:24
Rank: #21983
Start → 5K
29:24 | 9:28/mi
10K· 6.21 mi
56:21
Rank: #20928 (+1055)
5K → 10K
26:57 | 8:40/mi
15K· 9.32 mi
1:22:33
Rank: #19898 (+1030)
10K → 15K
26:12 | 8:26/mi
20K· 12.43 mi
1:49:00
Rank: #19177 (+721)
15K → 20K
26:27 | 8:31/mi
Half· 13.11 mi
1:54:44
Rank: #19071 (+106)
20K → Half
5:44 | 8:24/mi
25K· 15.53 mi
2:16:01
Rank: #18877 (+194)
Half → 25K
21:17 | 8:47/mi
30K· 18.64 mi
2:45:03
Rank: #18853 (+24)
25K → 30K
29:02 | 9:21/mi
20M
2:58:25
Rank: #18977 (-124)
30K → 20M
13:22 | 9:50/mi
21M
3:08:58
Rank: #19051 (-74)
20M → 21M
10:33 | 10:33/mi
35K· 21.75 mi
3:15:53
Rank: #19038 (+13)
21M → 35K
6:55 | 9:15/mi
23M
3:28:06
Rank: #19067 (-29)
35K → 23M
12:13 | 9:45/mi
24M
3:37:31
Rank: #19062 (+5)
23M → 24M
9:25 | 9:25/mi
40K· 24.85 mi
3:45:43
Rank: #19050 (+12)
24M → 40K
8:12 | 9:35/mi
25.2M
3:49:17
Rank: #19054 (-4)
40K → 25.2M
3:34 | 10:21/mi
Finish· 26.22 mi
3:58:35
Rank: #19050 (+4)
25.2M → Finish
9:18 | 9:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:44
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:03:51
Pace9:27 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:2129:249:2829:24
9:28
-
10K
6.21 mi12:16:1856:219:0426:57
8:40
-0:48
15K
9.32 mi12:42:301:22:338:5126:12
8:26
-0:14
20K
12.43 mi13:08:571:49:008:4626:27
8:31
+0:05
Half
13.11 mi13:14:411:54:448:455:44
8:24
-0:07
25K
15.53 mi13:35:582:16:018:4521:17
8:47
+0:23
30K
18.64 mi14:05:002:45:038:5129:02
9:21
+0:34
20M
20.00 mi14:18:222:58:258:5513:22
9:50
+0:29
21M
21.00 mi14:28:553:08:589:0010:33
10:33
+0:43
35K
21.75 mi14:35:503:15:539:006:55
9:15
-1:18
23M
23.00 mi14:48:033:28:069:0312:13
9:45
+0:30
24M
24.00 mi14:57:283:37:319:049:25
9:25
-0:20
40K
24.85 mi15:05:403:45:439:058:12
9:35
+0:10
25.2M
25.20 mi15:09:143:49:179:063:34
10:21
+0:46
Finish
26.22 mi15:18:323:58:359:069:18
9:08
-1:13

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

8:24 /mi

Average Pace

9:06 /mi

Slowest Pace

10:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:37

45% of race

Time at Steady Pace

1:32:16

39% of race

Time at Slower Pace

39:42

17% of race

Average Pace: 9:06 /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 mi11:49:2129:249:2829:24
9:28
#21983
10K
6.21 mi12:16:1856:219:0426:57
8:40
#20928
15K
9.32 mi12:42:301:22:338:5126:12
8:26
#19898
20K
12.43 mi13:08:571:49:008:4626:27
8:31
#19177
Half
13.11 mi13:14:411:54:448:455:44
8:24
#19071
25K
15.53 mi13:35:582:16:018:4521:17
8:47
#18877
30K
18.64 mi14:05:002:45:038:5129:02
9:21
#18853
20M
20.00 mi14:18:222:58:258:5513:22
9:50
#18977
21M
21.00 mi14:28:553:08:589:0010:33
10:33
#19051
35K
21.75 mi14:35:503:15:539:006:55
9:15
#19038
23M
23.00 mi14:48:033:28:069:0312:13
9:45
#19067
24M
24.00 mi14:57:283:37:319:049:25
9:25
#19062
40K
24.85 mi15:05:403:45:439:058:12
9:35
#19050
25.2M
25.20 mi15:09:143:49:179:063:34
10:21
#19054
Finish
26.22 mi15:18:323:58:359:069:18
9:08
#19050
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi21983130881308817355(Top 65%)11204(Top 74%)11204(Top 546%)
10K6.21 mi3.10 mi20928+105512623+46512623+46519268(Top 72%)12004(Top 79%)12004(Top 585%)
15K9.32 mi3.11 mi19898+103012200+42312200+42317355(Top 65%)11204(Top 74%)11204(Top 546%)
20K12.43 mi3.11 mi19177+72111934+26611934+26616941(Top 64%)11029(Top 73%)11029(Top 537%)
Half13.11 mi0.68 mi19071+10611886+4811886+4817144(Top 64%)11153(Top 73%)11153(Top 544%)
25K15.53 mi2.42 mi18877+19411807+7911807+7917821(Top 67%)11334(Top 75%)11334(Top 552%)
30K18.64 mi3.11 mi18853+2411778+2911778+2918795(Top 71%)11693(Top 77%)11693(Top 570%)
20M20.00 mi1.36 mi18977-12411809-3111809-3119958(Top 75%)12108(Top 80%)12108(Top 590%)
21M21.00 mi1.00 mi19051-7411832-2311832-2319730(Top 74%)11926(Top 79%)11926(Top 581%)
35K21.75 mi0.75 mi19038+1311821+1111821+1118909(Top 71%)11544(Top 76%)11544(Top 563%)
23M23.00 mi1.25 mi19067-2911824-311824-319275(Top 72%)11685(Top 77%)11685(Top 569%)
24M24.00 mi1.00 mi19062+511808+1611808+1618903(Top 71%)11494(Top 76%)11494(Top 560%)
40K24.85 mi0.85 mi19050+1211801+711801+718635(Top 70%)11325(Top 75%)11325(Top 552%)
25.2M25.20 mi0.35 mi19054-411798+311798+318587(Top 70%)11296(Top 74%)11296(Top 550%)
Finish26.22 mi1.02 mi19050+411792+611792+618567(Top 70%)11344(Top 75%)11344(Top 553%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

17355

Males

11204

M50-54

11204

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

19268

Males

12004

M50-54

12004

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

17355

Males

11204

M50-54

11204

15K→20K

9.3 - 12.4 mi

Top 64%
×5stories
+106ft-86ft

Overall

16941

Males

11029

M50-54

11029

20K→Half

12.4 - 13.1 mi

Top 64%
×2stories
+19ft-37ft

Overall

17144

Males

11153

M50-54

11153

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17821

Males

11334

M50-54

11334

25K→30K

15.5 - 18.6 mi

Top 71%
×9stories
+181ft-148ft

Overall

18795

Males

11693

M50-54

11693

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

19958

Males

12108

M50-54

12108

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

19730

Males

11926

M50-54

11926

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18909

Males

11544

M50-54

11544

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19275

Males

11685

M50-54

11685

23M→24M

23.0 - 24.0 mi

Top 71%
×6stories
+12ft-82ft

Overall

18903

Males

11494

M50-54

11494

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18635

Males

11325

M50-54

11325

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18587

Males

11296

M50-54

11296

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

18567

Males

11344

M50-54

11344

Passing Analysis

Category:
Athletes Passed
3739
Passed By
806
Net Change
+2933
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21983
5K → 10K107823+1055#21983#20928
10K → 15K10355+1030#20928#19898
15K → 20K7265+721#19898#19177
20K → Half1060+106#19177#19071
Half → 25K22026+194#19071#18877
25K → 30K177153+24#18877#18853
30K → 20M45169-124#18853#18977
20M → 21M54128-74#18977#19051
21M → 35K4431+13#19051#19038
35K → 23M71100-29#19038#19067
23M → 24M6257+5#19067#19062
24M → 40K4836+12#19062#19050
40K → 25.2M2226-4#19050#19054
25.2M → Finish5147+4#19054#19050
TOTALS3739806+2933
📊

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