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BOSTON MARATHON 2023

Nathan Lanser

Bib: 8779•M

WI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:10
Rank: #9273
Start → 5K
7:27/mi
23:10 split
10K· 6.21 mi
46:36
Rank: #10022 (-749)
5K → 10K
7:33/mi
23:26 split
15K· 9.32 mi
1:10:09
Rank: #10291 (-269)
10K → 15K
7:35/mi
23:33 split
20K· 12.43 mi
1:33:57
Rank: #10353 (-62)
15K → 20K
7:40/mi
23:48 split
Half· 13.11 mi
1:39:07
Rank: #10378 (-25)
20K → Half
7:34/mi
5:10 split
25K· 15.53 mi
1:57:56
Rank: #10424 (-46)
Half → 25K
7:46/mi
18:49 split
30K· 18.64 mi
2:22:54
Rank: #10483 (-59)
25K → 30K
8:02/mi
24:58 split
20M
2:36:50
Rank: #11723 (-1240)
30K → 20M
10:15/mi
13:56 split
21M
2:46:46
Rank: #12190 (-467)
20M → 21M
9:56/mi
9:56 split
35K· 21.75 mi
2:53:34
Rank: #12475 (-285)
21M → 35K
9:05/mi
6:48 split
23M
3:04:53
Rank: #12738 (-263)
35K → 23M
9:02/mi
11:19 split
24M
3:12:57
Rank: #12686 (+52)
23M → 24M
8:04/mi
8:04 split
40K· 24.85 mi
3:21:40
Rank: #13100 (-414)
24M → 40K
10:12/mi
8:43 split
25.2M
3:25:30
Rank: #13293 (-193)
40K → 25.2M
11:07/mi
3:50 split
Finish· 26.22 mi
3:34:59
Rank: #13624 (-331)
25.2M → Finish
9:18/mi
9:29 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:07
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time1:55:52
Pace8:50 /mi
📊Positive Split: 16.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3223:107:2723:10
7:27
-
10K
6.21 mi11:11:5846:367:3023:26
7:33
+0:06
15K
9.32 mi11:35:311:10:097:3223:33
7:35
+0:02
20K
12.43 mi11:59:191:33:577:3423:48
7:40
+0:05
Half
13.11 mi12:04:291:39:077:345:10
7:34
-0:06
25K
15.53 mi12:23:181:57:567:3618:49
7:46
+0:12
30K
18.64 mi12:48:162:22:547:4024:58
8:02
+0:16
20M
20.00 mi13:02:122:36:507:5013:56
10:15
+2:13
21M
21.00 mi13:12:082:46:467:569:56
9:56
-0:19
35K
21.75 mi13:18:562:53:347:596:48
9:05
-0:51
23M
23.00 mi13:30:153:04:538:0211:19
9:02
-0:03
24M
24.00 mi13:38:193:12:578:028:04
8:04
-0:58
40K
24.85 mi13:47:023:21:408:078:43
10:12
+2:08
25.2M
25.20 mi13:50:523:25:308:093:50
11:07
+0:55
Finish
26.22 mi14:00:213:34:598:129:29
9:18
-1:49

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

7:27 /mi

Average Pace

8:12 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

23:10

11% of race

Time at Steady Pace

2:07:48

59% of race

Time at Slower Pace

1:04:01

30% of race

Average Pace: 8:12 /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 mi10:48:3223:107:2723:10
7:27
#9273
10K
6.21 mi11:11:5846:367:3023:26
7:33
#10022
15K
9.32 mi11:35:311:10:097:3223:33
7:35
#10291
20K
12.43 mi11:59:191:33:577:3423:48
7:40
#10353
Half
13.11 mi12:04:291:39:077:345:10
7:34
#10378
25K
15.53 mi12:23:181:57:567:3618:49
7:46
#10424
30K
18.64 mi12:48:162:22:547:4024:58
8:02
#10483
20M
20.00 mi13:02:122:36:507:5013:56
10:15
#11723
21M
21.00 mi13:12:082:46:467:569:56
9:56
#12190
35K
21.75 mi13:18:562:53:347:596:48
9:05
#12475
23M
23.00 mi13:30:153:04:538:0211:19
9:02
#12738
24M
24.00 mi13:38:193:12:578:028:04
8:04
#12686
40K
24.85 mi13:47:023:21:408:078:43
10:12
#13100
25.2M
25.20 mi13:50:523:25:308:093:50
11:07
#13293
Finish
26.22 mi14:00:213:34:598:129:29
9:18
#13624
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi92737749774910834(Top 41%)8572(Top 56%)8572(Top 383%)
10K6.21 mi3.10 mi10022-7498162-4138162-41310815(Top 41%)8593(Top 57%)8593(Top 383%)
15K9.32 mi3.11 mi10291-2698325-1638325-16310834(Top 41%)8572(Top 56%)8572(Top 383%)
20K12.43 mi3.11 mi10353-628344-198344-1910591(Top 40%)8384(Top 55%)8384(Top 374%)
Half13.11 mi0.68 mi10378-258347-38347-310811(Top 41%)8537(Top 56%)8537(Top 381%)
25K15.53 mi2.42 mi10424-468352-58352-510792(Top 41%)8399(Top 55%)8399(Top 375%)
30K18.64 mi3.11 mi10483-598326+268326+2611187(Top 42%)8445(Top 56%)8445(Top 377%)
20M20.00 mi1.36 mi11723-12408870-5448870-54421135(Top 79%)12621(Top 83%)12621(Top 563%)
21M21.00 mi1.00 mi12190-4679059-1899059-18917760(Top 67%)11119(Top 73%)11119(Top 496%)
35K21.75 mi0.75 mi12475-2859159-1009159-10018231(Top 68%)11233(Top 74%)11233(Top 501%)
23M23.00 mi1.25 mi12738-2639247-889247-8816216(Top 61%)10333(Top 68%)10333(Top 461%)
24M24.00 mi1.00 mi12686+529204+439204+4311679(Top 44%)8247(Top 54%)8247(Top 368%)
40K24.85 mi0.85 mi13100-4149351-1479351-14720458(Top 77%)12121(Top 80%)12121(Top 541%)
25.2M25.20 mi0.35 mi13293-1939424-739424-7320672(Top 78%)12223(Top 81%)12223(Top 545%)
Finish26.22 mi1.02 mi13624-3319544-1209544-12019367(Top 73%)11682(Top 77%)11682(Top 521%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10834

Males

8572

M40-44

8572

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

10815

Males

8593

M40-44

8593

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10834

Males

8572

M40-44

8572

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10591

Males

8384

M40-44

8384

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

10811

Males

8537

M40-44

8537

Half→25K

13.1 - 15.5 mi

Top 41%
×4story building
+66ft-88ft

Overall

10792

Males

8399

M40-44

8399

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11187

Males

8445

M40-44

8445

30K→20M

18.6 - 20.0 mi

Top 79%
×5story building
+64ft-50ft

Overall

21135

Males

12621

M40-44

12621

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17760

Males

11119

M40-44

11119

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

18231

Males

11233

M40-44

11233

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

16216

Males

10333

M40-44

10333

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

11679

Males

8247

M40-44

8247

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20458

Males

12121

M40-44

12121

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20672

Males

12223

M40-44

12223

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

19367

Males

11682

M40-44

11682

Passing Analysis

Category:
Athletes Passed
792
Passed By
5141
Net Change
-4351
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9273
5K → 10K80828-749#9273#10022
10K → 15K91359-269#10022#10291
15K → 20K134196-62#10291#10353
20K → Half1944-25#10353#10378
Half → 25K129175-46#10378#10424
25K → 30K148207-59#10424#10483
30K → 20M31243-1240#10483#11723
20M → 21M12479-467#11723#12190
21M → 35K8293-285#12190#12475
35K → 23M32295-263#12475#12738
23M → 24M9543+52#12738#12686
24M → 40K9423-414#12686#13100
40K → 25.2M15208-193#13100#13293
25.2M → Finish17348-331#13293#13624
TOTALS7925141-4351
📊

Passing Visuals

Category:
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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