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BOSTON MARATHON 2023

Matthew Sheaff

Bib: 31538•M

RI

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

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
10:06/mi
31:24
↑ 97↓ 3451.5%
10K· 6.21 mi
10:05/mi
1:02:43
↑ 79↓ 1380.4%
15K· 9.32 mi
10:19/mi
1:34:46
↑ 67↓ 78
20K· 12.43 mi
11:42/mi
2:11:08
↑ 106↓ 860.1%
Half· 13.11 mi
11:39/mi
2:19:05
↑ 19↓ 370.5%
25K· 15.53 mi
13:32/mi
2:51:54
↑ 66↓ 880.2%
30K· 18.64 mi
15:12/mi
3:39:09
↑ 181↓ 1480.2%
20M
15:37/mi
4:00:22
↑ 64↓ 500.2%
21M
15:50/mi
4:16:12
↑ 106↓ 241.6%
35K· 21.75 mi
15:25/mi
4:27:44
↑ 17↓ 861.7%
23M
15:54/mi
4:47:39
↑ 23↓ 630.6%
24M
13:48/mi
5:01:27
↓ 821.3%
40K· 24.85 mi
13:21/mi
5:12:52
↓ 200.3%
25.2M
13:52/mi
5:17:39
↑ 13↓ 160.2%
Finish· 26.22 mi
11:51/mi
5:29:44
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:19:05
Pace10:37 /mi
2nd Half
Distance13.11 mi
Time3:10:39
Pace14:33 /mi
📊Positive Split: 37.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:4831:2410:0631:24
10:06
-
10K
6.21 mi12:24:071:02:4310:0631:19
10:05
-0:01
15K
9.32 mi12:56:101:34:4610:1032:03
10:19
+0:14
20K
12.43 mi13:32:322:11:0810:3336:22
11:42
+1:23
Half
13.11 mi13:40:292:19:0510:377:57
11:39
-0:03
25K
15.53 mi14:13:182:51:5411:0432:49
13:32
+1:53
30K
18.64 mi15:00:333:39:0911:4547:15
15:12
+1:40
20M
20.00 mi15:21:464:00:2212:0121:13
15:37
+0:25
21M
21.00 mi15:37:364:16:1212:1215:50
15:50
+0:13
35K
21.75 mi15:49:084:27:4412:1911:32
15:25
-0:25
23M
23.00 mi16:09:034:47:3912:3019:55
15:54
+0:29
24M
24.00 mi16:22:515:01:2712:3413:48
13:48
-2:06
40K
24.85 mi16:34:165:12:5212:3511:25
13:21
-0:27
25.2M
25.20 mi16:39:035:17:3912:364:47
13:52
+0:31
Finish
26.22 mi16:51:085:29:4412:3512:05
11:51
-2:01

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

10:05 /mi

Average Pace

12:35 /mi

Slowest Pace

15:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:10

46% of race

Time at Steady Pace

1:02:49

19% of race

Time at Slower Pace

1:55:45

35% of race

Average Pace: 12:35 /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 mi11:52:4831:2410:0631:24
10:06
#23699
10K
6.21 mi12:24:071:02:4310:0631:19
10:05
#23833
15K
9.32 mi12:56:101:34:4610:1032:03
10:19
#23937
20K
12.43 mi13:32:322:11:0810:3336:22
11:42
#24504
Half
13.11 mi13:40:292:19:0510:377:57
11:39
#24605
25K
15.53 mi14:13:182:51:5411:0432:49
13:32
#25098
30K
18.64 mi15:00:333:39:0911:4547:15
15:12
#25603
20M
20.00 mi15:21:464:00:2212:0121:13
15:37
#25706
21M
21.00 mi15:37:364:16:1212:1215:50
15:50
#25757
35K
21.75 mi15:49:084:27:4412:1911:32
15:25
#25823
23M
23.00 mi16:09:034:47:3912:3019:55
15:54
#25907
24M
24.00 mi16:22:515:01:2712:3413:48
13:48
#25922
40K
24.85 mi16:34:165:12:5212:3511:25
13:21
#25908
25.2M
25.20 mi16:39:035:17:3912:364:47
13:52
#25895
Finish
26.22 mi16:51:085:29:4412:3512:05
11:51
#25884
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23699139311393124121(Top 91%)14138(Top 93%)14138(Top 268%)
10K6.21 mi3.10 mi23833-13414012-8114012-8123863(Top 90%)14029(Top 92%)14029(Top 265%)
15K9.32 mi3.11 mi23937-10414059-4714059-4724121(Top 91%)14138(Top 93%)14138(Top 268%)
20K12.43 mi3.11 mi24504-56714306-24714306-24725448(Top 96%)14685(Top 97%)14685(Top 278%)
Half13.11 mi0.68 mi24605-10114348-4214348-4225604(Top 96%)14735(Top 97%)14735(Top 279%)
25K15.53 mi2.42 mi25098-49314556-20814556-20826144(Top 98%)14965(Top 99%)14965(Top 283%)
30K18.64 mi3.11 mi25603-50514751-19514751-19526478(Top 99%)15106(Top 100%)15106(Top 286%)
20M20.00 mi1.36 mi25706-10314792-4114792-4126441(Top 99%)15079(Top 99%)15079(Top 285%)
21M21.00 mi1.00 mi25757-5114811-1914811-1926164(Top 98%)14937(Top 98%)14937(Top 283%)
35K21.75 mi0.75 mi25823-6614842-3114842-3126473(Top 99%)15089(Top 99%)15089(Top 286%)
23M23.00 mi1.25 mi25907-8414870-2814870-2826472(Top 99%)15089(Top 99%)15089(Top 286%)
24M24.00 mi1.00 mi25922-1514875-514875-525971(Top 98%)14800(Top 98%)14800(Top 280%)
40K24.85 mi0.85 mi25908+1414871+414871+425236(Top 95%)14425(Top 95%)14425(Top 273%)
25.2M25.20 mi0.35 mi25895+1314863+814863+824896(Top 94%)14235(Top 94%)14235(Top 269%)
Finish26.22 mi1.02 mi25884+1114858+514858+525109(Top 94%)14371(Top 95%)14371(Top 272%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21story building
+97ft-345ft

Overall

24121

Males

14138

M18-39

14138

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

23863

Males

14029

M18-39

14029

10K→15K

6.2 - 9.3 mi

Top 91%
×3story building
+67ft-78ft

Overall

24121

Males

14138

M18-39

14138

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

25448

Males

14685

M18-39

14685

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25604

Males

14735

M18-39

14735

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

26144

Males

14965

M18-39

14965

25K→30K

15.5 - 18.6 mi

Top 99%
×9story building
+181ft-148ft

Overall

26478

Males

15106

M18-39

15106

30K→20M

18.6 - 20.0 mi

Top 99%
×5story building
+64ft-50ft

Overall

26441

Males

15079

M18-39

15079

20M→21M

20.0 - 21.0 mi

Top 98%
×8story building
+106ft-24ft

Overall

26164

Males

14937

M18-39

14937

21M→35K

21.0 - 21.8 mi

Top 99%
×7story building
+17ft-86ft

Overall

26473

Males

15089

M18-39

15089

35K→23M

21.8 - 23.0 mi

Top 99%
×5story building
+23ft-63ft

Overall

26472

Males

15089

M18-39

15089

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

25971

Males

14800

M18-39

14800

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25236

Males

14425

M18-39

14425

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

24896

Males

14235

M18-39

14235

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

25109

Males

14371

M18-39

14371

Passing Analysis

Category:
Athletes Passed
326
Passed By
2511
Net Change
-2185
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23699
5K → 10K136270-134#23699#23833
10K → 15K81185-104#23833#23937
15K → 20K17584-567#23937#24504
20K → Half7108-101#24504#24605
Half → 25K7500-493#24605#25098
25K → 30K2507-505#25098#25603
30K → 20M10113-103#25603#25706
20M → 21M455-51#25706#25757
21M → 35K369-66#25757#25823
35K → 23M286-84#25823#25907
23M → 24M823-15#25907#25922
24M → 40K206+14#25922#25908
40K → 25.2M152+13#25908#25895
25.2M → Finish143+11#25895#25884
TOTALS3262511-2185
📊

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