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BOSTON MARATHON 2023

Michael Nelson

Bib: 10603•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 34%
Gender (Male)
#0 / 15176
Top 48%
Masters (Masters Men)
#0 / 9891
Top 37%
Division (M50-54)
#0 / 2052
Top 33%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:26/mi
23:06
↑ 97↓ 3451.5%
10K· 6.21 mi
7:17/mi
45:43
↑ 79↓ 1380.4%
15K· 9.32 mi
7:16/mi
1:08:19
↑ 67↓ 78
20K· 12.43 mi
7:28/mi
1:31:31
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:36:40
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:55:07
↑ 66↓ 880.2%
30K· 18.64 mi
7:47/mi
2:19:19
↑ 181↓ 1480.2%
20M
7:52/mi
2:30:01
↑ 64↓ 500.2%
21M
8:16/mi
2:38:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:41/mi
2:44:02
↑ 17↓ 861.7%
23M
7:58/mi
2:54:01
↑ 23↓ 630.6%
24M
7:51/mi
3:01:52
↓ 821.3%
40K· 24.85 mi
7:51/mi
3:08:35
↓ 200.3%
25.2M
8:30/mi
3:11:31
↑ 13↓ 160.2%
Finish· 26.22 mi
7:43/mi
3:19:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:40
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:42:43
Pace7:50 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2923:067:2623:06
7:26
-
10K
6.21 mi11:12:0645:437:2122:37
7:17
-0:09
15K
9.32 mi11:34:421:08:197:2022:36
7:16
-0:01
20K
12.43 mi11:57:541:31:317:2223:12
7:28
+0:12
Half
13.11 mi12:03:031:36:407:225:09
7:33
+0:05
25K
15.53 mi12:21:301:55:077:2518:27
7:37
+0:04
30K
18.64 mi12:45:422:19:197:2824:12
7:47
+0:10
20M
20.00 mi12:56:242:30:017:3010:42
7:52
+0:05
21M
21.00 mi13:04:402:38:177:328:16
8:16
+0:24
35K
21.75 mi13:10:252:44:027:335:45
7:41
-0:35
23M
23.00 mi13:20:242:54:017:349:59
7:58
+0:17
24M
24.00 mi13:28:153:01:527:357:51
7:51
-0:07
40K
24.85 mi13:34:583:08:357:356:43
7:51
0:00
25.2M
25.20 mi13:37:543:11:317:362:56
8:30
+0:39
Finish
26.22 mi13:45:463:19:237:377:52
7:43
-0:47

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

7:16 /mi

Average Pace

7:37 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:08:11

94% of race

Time at Steady Pace

11:12

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:36 /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 mi10:49:2923:067:2623:06
7:26
#9098
10K
6.21 mi11:12:0645:437:2122:37
7:17
#8868
15K
9.32 mi11:34:421:08:197:2022:36
7:16
#8683
20K
12.43 mi11:57:541:31:317:2223:12
7:28
#8729
Half
13.11 mi12:03:031:36:407:225:09
7:33
#8807
25K
15.53 mi12:21:301:55:077:2518:27
7:37
#8904
30K
18.64 mi12:45:422:19:197:2824:12
7:47
#8954
20M
20.00 mi12:56:242:30:017:3010:42
7:52
#8955
21M
21.00 mi13:04:402:38:177:328:16
8:16
#8943
35K
21.75 mi13:10:252:44:027:335:45
7:41
#8957
23M
23.00 mi13:20:242:54:017:349:59
7:58
#8968
24M
24.00 mi13:28:153:01:527:357:51
7:51
#9003
40K
24.85 mi13:34:583:08:357:356:43
7:51
#8984
25.2M
25.20 mi13:37:543:11:317:362:56
8:30
#8978
Finish
26.22 mi13:45:463:19:237:377:52
7:43
#9005
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9098765876588350(Top 31%)7143(Top 47%)7143(Top 348%)
10K6.21 mi3.10 mi8868+2307497+1617497+1618706(Top 33%)7389(Top 49%)7389(Top 360%)
15K9.32 mi3.11 mi8683+1857376+1217376+1218350(Top 31%)7143(Top 47%)7143(Top 348%)
20K12.43 mi3.11 mi8729-467392-167392-169047(Top 34%)7528(Top 50%)7528(Top 367%)
Half13.11 mi0.68 mi8807-787434-427434-4210521(Top 40%)8343(Top 55%)8343(Top 407%)
25K15.53 mi2.42 mi8904-977480-467480-469597(Top 36%)7757(Top 51%)7757(Top 378%)
30K18.64 mi3.11 mi8954-507478+27478+29266(Top 35%)7433(Top 49%)7433(Top 362%)
20M20.00 mi1.36 mi8955-17460+187460+189369(Top 35%)7397(Top 49%)7397(Top 360%)
21M21.00 mi1.00 mi8943+127429+317429+318995(Top 34%)7064(Top 47%)7064(Top 344%)
35K21.75 mi0.75 mi8957-147423+67423+69799(Top 37%)7512(Top 49%)7512(Top 366%)
23M23.00 mi1.25 mi8968-117402+217402+219550(Top 36%)7254(Top 48%)7254(Top 354%)
24M24.00 mi1.00 mi9003-357393+97393+910117(Top 38%)7451(Top 49%)7451(Top 363%)
40K24.85 mi0.85 mi8984+197368+257368+259006(Top 34%)6816(Top 45%)6816(Top 332%)
25.2M25.20 mi0.35 mi8978+67357+117357+119488(Top 36%)7014(Top 46%)7014(Top 342%)
Finish26.22 mi1.02 mi9005-277342+157342+1510066(Top 38%)7320(Top 48%)7320(Top 357%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21story building
+97ft-345ft

Overall

8350

Males

7143

M50-54

7143

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

8706

Males

7389

M50-54

7389

10K→15K

6.2 - 9.3 mi

Top 31%
×3story building
+67ft-78ft

Overall

8350

Males

7143

M50-54

7143

15K→20K

9.3 - 12.4 mi

Top 34%
×5story building
+106ft-86ft

Overall

9047

Males

7528

M50-54

7528

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10521

Males

8343

M50-54

8343

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9597

Males

7757

M50-54

7757

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9266

Males

7433

M50-54

7433

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

9369

Males

7397

M50-54

7397

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

8995

Males

7064

M50-54

7064

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

9799

Males

7512

M50-54

7512

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9550

Males

7254

M50-54

7254

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10117

Males

7451

M50-54

7451

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9006

Males

6816

M50-54

6816

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9488

Males

7014

M50-54

7014

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10066

Males

7320

M50-54

7320

Passing Analysis

Category:
Athletes Passed
1463
Passed By
1370
Net Change
+93
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9098
5K → 10K397167+230#9098#8868
10K → 15K24661+185#8868#8683
15K → 20K112158-46#8683#8729
20K → Half785-78#8729#8807
Half → 25K67164-97#8807#8904
25K → 30K160210-50#8904#8954
30K → 20M8586-1#8954#8955
20M → 21M7765+12#8955#8943
21M → 35K3852-14#8943#8957
35K → 23M7182-11#8957#8968
23M → 24M5893-35#8968#9003
24M → 40K5839+19#9003#8984
40K → 25.2M3428+6#8984#8978
25.2M → Finish5380-27#8978#9005
TOTALS14631370+93
📊

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