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BOSTON MARATHON 2023

Nathan Littlefield

Bib: 5473•M

MN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 38%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
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
23:11
Rank: #9306
Start → 5K
23:11 | 7:28/mi
10K· 6.21 mi
46:24
Rank: #9727 (-421)
5K → 10K
23:13 | 7:28/mi
15K· 9.32 mi
1:09:41
Rank: #9829 (-102)
10K → 15K
23:17 | 7:30/mi
20K· 12.43 mi
1:32:54
Rank: #9614 (+215)
15K → 20K
23:13 | 7:28/mi
Half· 13.11 mi
1:37:59
Rank: #9619 (-5)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:56:19
Rank: #9535 (+84)
Half → 25K
18:20 | 7:34/mi
30K· 18.64 mi
2:20:59
Rank: #9686 (-151)
25K → 30K
24:40 | 7:56/mi
20M
2:31:31
Rank: #9571 (+115)
30K → 20M
10:32 | 7:45/mi
21M
2:40:13
Rank: #9670 (-99)
20M → 21M
8:42 | 8:42/mi
35K· 21.75 mi
2:46:03
Rank: #9686 (-16)
21M → 35K
5:50 | 7:48/mi
23M
2:56:42
Rank: #9870 (-184)
35K → 23M
10:39 | 8:30/mi
24M
3:04:40
Rank: #9885 (-15)
23M → 24M
7:58 | 7:58/mi
40K· 24.85 mi
3:11:26
Rank: #9847 (+38)
24M → 40K
6:46 | 7:55/mi
25.2M
3:14:49
Rank: #9967 (-120)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:22:47
Rank: #9987 (-20)
25.2M → Finish
7:58 | 7:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:59
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:44:48
Pace8:00 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:1523:117:2823:11
7:28
-
10K
6.21 mi10:50:2846:247:2823:13
7:28
0:00
15K
9.32 mi11:13:451:09:417:2923:17
7:30
+0:02
20K
12.43 mi11:36:581:32:547:2923:13
7:28
-0:02
Half
13.11 mi11:42:031:37:597:285:05
7:27
-0:01
25K
15.53 mi12:00:231:56:197:2918:20
7:34
+0:07
30K
18.64 mi12:25:032:20:597:3424:40
7:56
+0:22
20M
20.00 mi12:35:352:31:317:3510:32
7:45
-0:11
21M
21.00 mi12:44:172:40:137:388:42
8:42
+0:57
35K
21.75 mi12:50:072:46:037:385:50
7:48
-0:54
23M
23.00 mi13:00:462:56:427:4110:39
8:30
+0:42
24M
24.00 mi13:08:443:04:407:427:58
7:58
-0:32
40K
24.85 mi13:15:303:11:267:426:46
7:55
-0:03
25.2M
25.20 mi13:18:533:14:497:443:23
9:49
+1:54
Finish
26.22 mi13:26:513:22:477:447:58
7:49
-2:00

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

7:44 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:42

37% of race

Time at Steady Pace

1:45:21

52% of race

Time at Slower Pace

22:44

11% of race

Average Pace: 7:44 /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 mi10:27:1523:117:2823:11
7:28
#9306
10K
6.21 mi10:50:2846:247:2823:13
7:28
#9727
15K
9.32 mi11:13:451:09:417:2923:17
7:30
#9829
20K
12.43 mi11:36:581:32:547:2923:13
7:28
#9614
Half
13.11 mi11:42:031:37:597:285:05
7:27
#9619
25K
15.53 mi12:00:231:56:197:2918:20
7:34
#9535
30K
18.64 mi12:25:032:20:597:3424:40
7:56
#9686
20M
20.00 mi12:35:352:31:317:3510:32
7:45
#9571
21M
21.00 mi12:44:172:40:137:388:42
8:42
#9670
35K
21.75 mi12:50:072:46:037:385:50
7:48
#9686
23M
23.00 mi13:00:462:56:427:4110:39
8:30
#9870
24M
24.00 mi13:08:443:04:407:427:58
7:58
#9885
40K
24.85 mi13:15:303:11:267:426:46
7:55
#9847
25.2M
25.20 mi13:18:533:14:497:443:23
9:49
#9967
Finish
26.22 mi13:26:513:22:477:447:58
7:49
#9987
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi93067758775810119(Top 38%)8206(Top 54%)8206(Top 366%)
10K6.21 mi3.10 mi9727-4218000-2428000-24210228(Top 38%)8290(Top 55%)8290(Top 370%)
15K9.32 mi3.11 mi9829-1028063-638063-6310119(Top 38%)8206(Top 54%)8206(Top 366%)
20K12.43 mi3.11 mi9614+2157929+1347929+1349100(Top 34%)7558(Top 50%)7558(Top 337%)
Half13.11 mi0.68 mi9619-57934-57934-59787(Top 37%)7980(Top 53%)7980(Top 356%)
25K15.53 mi2.42 mi9535+847859+757859+759243(Top 35%)7582(Top 50%)7582(Top 338%)
30K18.64 mi3.11 mi9686-1517917-587917-5810420(Top 39%)8047(Top 53%)8047(Top 359%)
20M20.00 mi1.36 mi9571+1157821+967821+968519(Top 32%)6911(Top 46%)6911(Top 308%)
21M21.00 mi1.00 mi9670-997865-447865-4411627(Top 44%)8394(Top 55%)8394(Top 375%)
35K21.75 mi0.75 mi9686-167856+97856+910598(Top 40%)7913(Top 52%)7913(Top 353%)
23M23.00 mi1.25 mi9870-1847922-667922-6613237(Top 50%)9008(Top 59%)9008(Top 402%)
24M24.00 mi1.00 mi9885-157895+277895+2710980(Top 41%)7884(Top 52%)7884(Top 352%)
40K24.85 mi0.85 mi9847+387845+507845+509415(Top 35%)7042(Top 46%)7042(Top 314%)
25.2M25.20 mi0.35 mi9967-1207891-467891-4616490(Top 62%)10302(Top 68%)10302(Top 460%)
Finish26.22 mi1.02 mi9987-207885+67885+610775(Top 40%)7686(Top 51%)7686(Top 343%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10119

Males

8206

M40-44

8206

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10228

Males

8290

M40-44

8290

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10119

Males

8206

M40-44

8206

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9100

Males

7558

M40-44

7558

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9787

Males

7980

M40-44

7980

Half→25K

13.1 - 15.5 mi

Top 35%
×4stories
+66ft-88ft

Overall

9243

Males

7582

M40-44

7582

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10420

Males

8047

M40-44

8047

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8519

Males

6911

M40-44

6911

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11627

Males

8394

M40-44

8394

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

10598

Males

7913

M40-44

7913

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

13237

Males

9008

M40-44

9008

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10980

Males

7884

M40-44

7884

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9415

Males

7042

M40-44

7042

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16490

Males

10302

M40-44

10302

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

10775

Males

7686

M40-44

7686

Passing Analysis

Category:
Athletes Passed
1352*
Passed By
2032
Net Change
-681
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9306
5K → 10K148569-421#9306#9727
10K → 15K134236-102#9727#9829
15K → 20K267*52+215#9829#9614
20K → Half2025-5#9614#9619
Half → 25K16379+84#9619#9535
25K → 30K125*276-151#9535#9686
30K → 20M14126+115#9686#9571
20M → 21M49148-99#9571#9670
21M → 35K3450-16#9670#9686
35K → 23M45229-184#9686#9870
23M → 24M6781-15#9870#9885
24M → 40K7739+38#9885#9847
40K → 25.2M8128-120#9847#9967
25.2M → Finish7494-20#9967#9987
TOTALS1352*2032-681

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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