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BOSTON MARATHON 2023

James Blackwelder

Bib: 5891•M

SC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 35%
Gender (Male)
#0 / 15176
Top 49%
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
21:55
Rank: #6597
Start → 5K
21:55 | 7:03/mi
10K· 6.21 mi
44:06
Rank: #7088 (-491)
5K → 10K
22:11 | 7:08/mi
15K· 9.32 mi
1:06:38
Rank: #7411 (-323)
10K → 15K
22:32 | 7:15/mi
20K· 12.43 mi
1:29:34
Rank: #7596 (-185)
15K → 20K
22:56 | 7:23/mi
Half· 13.11 mi
1:34:27
Rank: #7579 (+17)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:52:26
Rank: #7637 (-58)
Half → 25K
17:59 | 7:25/mi
30K· 18.64 mi
2:16:34
Rank: #7828 (-191)
25K → 30K
24:08 | 7:46/mi
20M
2:27:09
Rank: #7848 (-20)
30K → 20M
10:35 | 7:47/mi
21M
2:35:08
Rank: #7764 (+84)
20M → 21M
7:59 | 7:59/mi
35K· 21.75 mi
2:41:01
Rank: #7875 (-111)
21M → 35K
5:53 | 7:52/mi
23M
2:51:53
Rank: #8252 (-377)
35K → 23M
10:52 | 8:41/mi
24M
3:00:43
Rank: #8648 (-396)
23M → 24M
8:50 | 8:50/mi
40K· 24.85 mi
3:08:33
Rank: #8972 (-324)
24M → 40K
7:50 | 9:10/mi
25.2M
3:11:43
Rank: #9036 (-64)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:20:11
Rank: #9241 (-205)
25.2M → Finish
8:28 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:27
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time1:45:44
Pace8:04 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3421:557:0321:55
7:03
-
10K
6.21 mi10:46:4544:067:0622:11
7:08
+0:05
15K
9.32 mi11:09:171:06:387:0922:32
7:15
+0:07
20K
12.43 mi11:32:131:29:347:1222:56
7:23
+0:08
Half
13.11 mi11:37:061:34:277:124:53
7:09
-0:14
25K
15.53 mi11:55:051:52:267:1417:59
7:25
+0:16
30K
18.64 mi12:19:132:16:347:2024:08
7:46
+0:21
20M
20.00 mi12:29:482:27:097:2110:35
7:47
+0:01
21M
21.00 mi12:37:472:35:087:237:59
7:59
+0:12
35K
21.75 mi12:43:402:41:017:245:53
7:52
-0:07
23M
23.00 mi12:54:322:51:537:2810:52
8:41
+0:49
24M
24.00 mi13:03:223:00:437:328:50
8:50
+0:09
40K
24.85 mi13:11:123:08:337:357:50
9:10
+0:20
25.2M
25.20 mi13:14:223:11:437:363:10
9:11
+0:01
Finish
26.22 mi13:22:503:20:117:388:28
8:19
-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

7:03 /mi

Average Pace

7:38 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:26

56% of race

Time at Steady Pace

48:35

24% of race

Time at Slower Pace

39:10

20% of race

Average Pace: 7:38 /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 mi10:24:3421:557:0321:55
7:03
#6597
10K
6.21 mi10:46:4544:067:0622:11
7:08
#7088
15K
9.32 mi11:09:171:06:387:0922:32
7:15
#7411
20K
12.43 mi11:32:131:29:347:1222:56
7:23
#7596
Half
13.11 mi11:37:061:34:277:124:53
7:09
#7579
25K
15.53 mi11:55:051:52:267:1417:59
7:25
#7637
30K
18.64 mi12:19:132:16:347:2024:08
7:46
#7828
20M
20.00 mi12:29:482:27:097:2110:35
7:47
#7848
21M
21.00 mi12:37:472:35:087:237:59
7:59
#7764
35K
21.75 mi12:43:402:41:017:245:53
7:52
#7875
23M
23.00 mi12:54:322:51:537:2810:52
8:41
#8252
24M
24.00 mi13:03:223:00:437:328:50
8:50
#8648
40K
24.85 mi13:11:123:08:337:357:50
9:10
#8972
25.2M
25.20 mi13:14:223:11:437:363:10
9:11
#9036
Finish
26.22 mi13:22:503:20:117:388:28
8:19
#9241
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6597596259628166(Top 31%)7033(Top 46%)7033(Top 133%)
10K6.21 mi3.10 mi7088-4916323-3616323-3617691(Top 29%)6727(Top 44%)6727(Top 127%)
15K9.32 mi3.11 mi7411-3236564-2416564-2418166(Top 31%)7033(Top 46%)7033(Top 133%)
20K12.43 mi3.11 mi7596-1856670-1066670-1068370(Top 31%)7113(Top 47%)7113(Top 135%)
Half13.11 mi0.68 mi7579+176656+146656+147580(Top 28%)6639(Top 44%)6639(Top 126%)
25K15.53 mi2.42 mi7637-586682-266682-268166(Top 31%)6917(Top 46%)6917(Top 131%)
30K18.64 mi3.11 mi7828-1916766-846766-849099(Top 34%)7345(Top 48%)7345(Top 139%)
20M20.00 mi1.36 mi7848-206760+66760+68753(Top 33%)7051(Top 46%)7051(Top 133%)
21M21.00 mi1.00 mi7764+846697+636697+637256(Top 27%)6034(Top 40%)6034(Top 114%)
35K21.75 mi0.75 mi7875-1116756-596756-5911062(Top 42%)8131(Top 54%)8131(Top 154%)
23M23.00 mi1.25 mi8252-3776966-2106966-21014219(Top 53%)9457(Top 62%)9457(Top 179%)
24M24.00 mi1.00 mi8648-3967187-2217187-22116351(Top 61%)10320(Top 68%)10320(Top 195%)
40K24.85 mi0.85 mi8972-3247360-1737360-17316884(Top 63%)10520(Top 69%)10520(Top 199%)
25.2M25.20 mi0.35 mi9036-647391-317391-3113449(Top 51%)8942(Top 59%)8942(Top 169%)
Finish26.22 mi1.02 mi9241-2057477-867477-8614125(Top 53%)9291(Top 61%)9291(Top 176%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8166

Males

7033

M18-39

7033

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7691

Males

6727

M18-39

6727

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8166

Males

7033

M18-39

7033

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8370

Males

7113

M18-39

7113

20K→Half

12.4 - 13.1 mi

Top 28%
×2stories
+19ft-37ft

Overall

7580

Males

6639

M18-39

6639

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8166

Males

6917

M18-39

6917

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9099

Males

7345

M18-39

7345

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

8753

Males

7051

M18-39

7051

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7256

Males

6034

M18-39

6034

21M→35K

21.0 - 21.8 mi

Top 42%
×7stories
+17ft-86ft

Overall

11062

Males

8131

M18-39

8131

35K→23M

21.8 - 23.0 mi

Top 53%
×5stories
+23ft-63ft

Overall

14219

Males

9457

M18-39

9457

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

16351

Males

10320

M18-39

10320

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16884

Males

10520

M18-39

10520

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13449

Males

8942

M18-39

8942

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14125

Males

9291

M18-39

9291

Passing Analysis

Category:
Athletes Passed
600
Passed By
3244
Net Change
-2644
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6597
5K → 10K48539-491#6597#7088
10K → 15K41364-323#7088#7411
15K → 20K67252-185#7411#7596
20K → Half3417+17#7596#7579
Half → 25K66124-58#7579#7637
25K → 30K77268-191#7637#7828
30K → 20M6080-20#7828#7848
20M → 21M11531+84#7848#7764
21M → 35K18129-111#7764#7875
35K → 23M22399-377#7875#8252
23M → 24M16412-396#8252#8648
24M → 40K9333-324#8648#8972
40K → 25.2M973-64#8972#9036
25.2M → Finish18223-205#9036#9241
TOTALS6003244-2644
📊

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