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BOSTON MARATHON 2023

James Nelson

Bib: 30381•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
30:41
Rank: #23135
Start → 5K
30:41 | 9:53/mi
10K· 6.21 mi
1:00:46
Rank: #23117 (+18)
5K → 10K
30:05 | 9:41/mi
15K· 9.32 mi
1:31:16
Rank: #23128 (-11)
10K → 15K
30:30 | 9:49/mi
20K· 12.43 mi
2:02:11
Rank: #23009 (+119)
15K → 20K
30:55 | 9:57/mi
Half· 13.11 mi
2:08:53
Rank: #23010 (-1)
20K → Half
6:42 | 9:49/mi
25K· 15.53 mi
2:33:12
Rank: #22875 (+135)
Half → 25K
24:19 | 10:02/mi
30K· 18.64 mi
3:09:23
Rank: #23161 (-286)
25K → 30K
36:11 | 11:39/mi
20M
3:24:31
Rank: #23138 (+23)
30K → 20M
15:08 | 11:08/mi
21M
3:36:40
Rank: #23133 (+5)
20M → 21M
12:09 | 12:09/mi
35K· 21.75 mi
3:44:46
Rank: #23128 (+5)
21M → 35K
8:06 | 10:50/mi
23M
3:58:56
Rank: #23114 (+14)
35K → 23M
14:10 | 11:19/mi
24M
4:10:12
Rank: #23139 (-25)
23M → 24M
11:16 | 11:16/mi
40K· 24.85 mi
4:19:40
Rank: #23090 (+49)
24M → 40K
9:28 | 11:04/mi
25.2M
4:23:37
Rank: #23074 (+16)
40K → 25.2M
3:57 | 11:27/mi
Finish· 26.22 mi
4:33:43
Rank: #23013 (+61)
25.2M → Finish
10:06 | 9:55/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:53
Pace9:50 /mi
2nd Half
Distance13.11 mi
Time2:24:50
Pace11:03 /mi
📊Positive Split: 12.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:4330:419:5330:41
9:53
-
10K
6.21 mi12:22:481:00:469:4730:05
9:41
-0:12
15K
9.32 mi12:53:181:31:169:4830:30
9:49
+0:08
20K
12.43 mi13:24:132:02:119:5030:55
9:57
+0:08
Half
13.11 mi13:30:552:08:539:506:42
9:49
-0:08
25K
15.53 mi13:55:142:33:129:5224:19
10:02
+0:13
30K
18.64 mi14:31:253:09:2310:1036:11
11:39
+1:37
20M
20.00 mi14:46:333:24:3110:1415:08
11:08
-0:31
21M
21.00 mi14:58:423:36:4010:1912:09
12:09
+1:01
35K
21.75 mi15:06:483:44:4610:208:06
10:50
-1:19
23M
23.00 mi15:20:583:58:5610:2314:10
11:19
+0:29
24M
24.00 mi15:32:144:10:1210:2611:16
11:16
-0:03
40K
24.85 mi15:41:424:19:4010:279:28
11:04
-0:12
25.2M
25.20 mi15:45:394:23:3710:283:57
11:27
+0:23
Finish
26.22 mi15:55:454:33:4310:2710:06
9:55
-1:32

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

9:41 /mi

Average Pace

10:27 /mi

Slowest Pace

12:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:18

60% of race

Time at Steady Pace

32:42

12% of race

Time at Slower Pace

1:17:43

28% of race

Average Pace: 10:26 /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 mi11:52:4330:419:5330:41
9:53
#23135
10K
6.21 mi12:22:481:00:469:4730:05
9:41
#23117
15K
9.32 mi12:53:181:31:169:4830:30
9:49
#23128
20K
12.43 mi13:24:132:02:119:5030:55
9:57
#23009
Half
13.11 mi13:30:552:08:539:506:42
9:49
#23010
25K
15.53 mi13:55:142:33:129:5224:19
10:02
#22875
30K
18.64 mi14:31:253:09:2310:1036:11
11:39
#23161
20M
20.00 mi14:46:333:24:3110:1415:08
11:08
#23138
21M
21.00 mi14:58:423:36:4010:1912:09
12:09
#23133
35K
21.75 mi15:06:483:44:4610:208:06
10:50
#23128
23M
23.00 mi15:20:583:58:5610:2314:10
11:19
#23114
24M
24.00 mi15:32:144:10:1210:2611:16
11:16
#23139
40K
24.85 mi15:41:424:19:4010:279:28
11:04
#23090
25.2M
25.20 mi15:45:394:23:3710:283:57
11:27
#23074
Finish
26.22 mi15:55:454:33:4310:2710:06
9:55
#23013
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23135136521365223087(Top 87%)13676(Top 90%)13676(Top 259%)
10K6.21 mi3.10 mi23117+1813664-1213664-1223007(Top 86%)13650(Top 90%)13650(Top 258%)
15K9.32 mi3.11 mi23128-1113687-2313687-2323087(Top 87%)13676(Top 90%)13676(Top 259%)
20K12.43 mi3.11 mi23009+11913635+5213635+5222785(Top 86%)13524(Top 89%)13524(Top 256%)
Half13.11 mi0.68 mi23010-113637-213637-222906(Top 86%)13581(Top 89%)13581(Top 257%)
25K15.53 mi2.42 mi22875+13513558+7913558+7922273(Top 84%)13269(Top 87%)13269(Top 251%)
30K18.64 mi3.11 mi23161-28613672-11413672-11424051(Top 90%)13991(Top 92%)13991(Top 265%)
20M20.00 mi1.36 mi23138+2313649+2313649+2322924(Top 86%)13434(Top 89%)13434(Top 254%)
21M21.00 mi1.00 mi23133+513632+1713632+1722966(Top 86%)13412(Top 88%)13412(Top 254%)
35K21.75 mi0.75 mi23128+513621+1113621+1122975(Top 86%)13374(Top 88%)13374(Top 253%)
23M23.00 mi1.25 mi23114+1413610+1113610+1122910(Top 86%)13347(Top 88%)13347(Top 253%)
24M24.00 mi1.00 mi23139-2513617-713617-723534(Top 88%)13601(Top 90%)13601(Top 257%)
40K24.85 mi0.85 mi23090+4913581+3613581+3622497(Top 85%)13080(Top 86%)13080(Top 247%)
25.2M25.20 mi0.35 mi23074+1613570+1113570+1121447(Top 81%)12596(Top 83%)12596(Top 238%)
Finish26.22 mi1.02 mi23013+6113538+3213538+3221510(Top 81%)12641(Top 83%)12641(Top 239%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21stories
+97ft-345ft

Overall

23087

Males

13676

M18-39

13676

5K→10K

3.1 - 6.2 mi

Top 86%
×5stories
+79ft-138ft

Overall

23007

Males

13650

M18-39

13650

10K→15K

6.2 - 9.3 mi

Top 87%
×3stories
+67ft-78ft

Overall

23087

Males

13676

M18-39

13676

15K→20K

9.3 - 12.4 mi

Top 86%
×5stories
+106ft-86ft

Overall

22785

Males

13524

M18-39

13524

20K→Half

12.4 - 13.1 mi

Top 86%
×2stories
+19ft-37ft

Overall

22906

Males

13581

M18-39

13581

Half→25K

13.1 - 15.5 mi

Top 84%
×4stories
+66ft-88ft

Overall

22273

Males

13269

M18-39

13269

25K→30K

15.5 - 18.6 mi

Top 90%
×9stories
+181ft-148ft

Overall

24051

Males

13991

M18-39

13991

30K→20M

18.6 - 20.0 mi

Top 86%
×5stories
+64ft-50ft

Overall

22924

Males

13434

M18-39

13434

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

22966

Males

13412

M18-39

13412

21M→35K

21.0 - 21.8 mi

Top 86%
×7stories
+17ft-86ft

Overall

22975

Males

13374

M18-39

13374

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

22910

Males

13347

M18-39

13347

23M→24M

23.0 - 24.0 mi

Top 88%
×6stories
+12ft-82ft

Overall

23534

Males

13601

M18-39

13601

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22497

Males

13080

M18-39

13080

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21447

Males

12596

M18-39

12596

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21510

Males

12641

M18-39

12641

Passing Analysis

Category:
Athletes Passed
1172
Passed By
1050
Net Change
+122
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23135
5K → 10K222204+18#23135#23117
10K → 15K135146-11#23117#23128
15K → 20K19172+119#23128#23009
20K → Half2526-1#23009#23010
Half → 25K15520+135#23010#22875
25K → 30K46332-286#22875#23161
30K → 20M6542+23#23161#23138
20M → 21M5045+5#23138#23133
21M → 35K2823+5#23133#23128
35K → 23M5945+14#23128#23114
23M → 24M2752-25#23114#23139
24M → 40K6718+49#23139#23090
40K → 25.2M2711+16#23090#23074
25.2M → Finish7514+61#23074#23013
TOTALS11721050+122
📊

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