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BOSTON MARATHON 2023

Matthew Masi-Phelps

Bib: 6654•M

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 7%
Gender (Male)
#0 / 15176
Top 11%
Division (M18-39)
#0 / 5285
Top 25%
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
6:35/mi
20:27
↑ 97↓ 3451.5%
10K· 6.21 mi
6:27/mi
40:29
↑ 79↓ 1380.4%
15K· 9.32 mi
6:28/mi
1:00:34
↑ 67↓ 78
20K· 12.43 mi
6:27/mi
1:20:36
↑ 106↓ 860.1%
Half· 13.11 mi
6:23/mi
1:24:57
↑ 19↓ 370.5%
25K· 15.53 mi
6:27/mi
1:40:35
↑ 66↓ 880.2%
30K· 18.64 mi
6:30/mi
2:00:47
↑ 181↓ 1480.2%
20M
6:28/mi
2:09:34
↑ 64↓ 500.2%
21M
6:35/mi
2:16:09
↑ 106↓ 241.6%
35K· 21.75 mi
6:10/mi
2:20:46
↑ 17↓ 861.7%
23M
6:31/mi
2:28:55
↑ 23↓ 630.6%
24M
6:29/mi
2:35:24
↓ 821.3%
40K· 24.85 mi
6:29/mi
2:40:57
↓ 200.3%
25.2M
6:55/mi
2:43:20
↑ 13↓ 160.2%
Finish· 26.22 mi
6:20/mi
2:49:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:24:57
Pace6:29 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:24:50
Pace6:28 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4520:276:3520:27
6:35
-
10K
6.21 mi10:43:4740:296:3120:02
6:27
-0:08
15K
9.32 mi11:03:521:00:346:3020:05
6:28
+0:01
20K
12.43 mi11:23:541:20:366:2920:02
6:27
-0:01
Half
13.11 mi11:28:151:24:576:294:21
6:23
-0:04
25K
15.53 mi11:43:531:40:356:2815:38
6:27
+0:04
30K
18.64 mi12:04:052:00:476:2920:12
6:30
+0:03
20M
20.00 mi12:12:522:09:346:298:47
6:28
-0:02
21M
21.00 mi12:19:272:16:096:296:35
6:35
+0:07
35K
21.75 mi12:24:042:20:466:284:37
6:10
-0:25
23M
23.00 mi12:32:132:28:556:288:09
6:31
+0:21
24M
24.00 mi12:38:422:35:246:296:29
6:29
-0:02
40K
24.85 mi12:44:152:40:576:295:33
6:29
0:00
25.2M
25.20 mi12:46:382:43:206:292:23
6:55
+0:26
Finish
26.22 mi12:53:052:49:476:296:27
6:20
-0:35

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

6:10 /mi

Average Pace

6:29 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:24

99% of race

Time at Steady Pace

2:23

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:29 /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 mi10:23:4520:276:3520:27
6:35
#2737
10K
6.21 mi10:43:4740:296:3120:02
6:27
#2607
15K
9.32 mi11:03:521:00:346:3020:05
6:28
#2513
20K
12.43 mi11:23:541:20:366:2920:02
6:27
#2369
Half
13.11 mi11:28:151:24:576:294:21
6:23
#2361
25K
15.53 mi11:43:531:40:356:2815:38
6:27
#2278
30K
18.64 mi12:04:052:00:476:2920:12
6:30
#2117
20M
20.00 mi12:12:522:09:346:298:47
6:28
#2033
21M
21.00 mi12:19:272:16:096:296:35
6:35
#1925
35K
21.75 mi12:24:042:20:466:284:37
6:10
#1887
23M
23.00 mi12:32:132:28:556:288:09
6:31
#1831
24M
24.00 mi12:38:422:35:246:296:29
6:29
#1816
40K
24.85 mi12:44:152:40:576:295:33
6:29
#1785
25.2M
25.20 mi12:46:382:43:206:292:23
6:55
#1762
Finish
26.22 mi12:53:052:49:476:296:27
6:20
#1742
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2737260526052420(Top 9%)2321(Top 15%)2321(Top 44%)
10K6.21 mi3.10 mi2607+1302487+1182487+1182474(Top 9%)2365(Top 16%)2365(Top 45%)
15K9.32 mi3.11 mi2513+942400+872400+872420(Top 9%)2321(Top 15%)2321(Top 44%)
20K12.43 mi3.11 mi2369+1442269+1312269+1312019(Top 8%)1938(Top 13%)1938(Top 37%)
Half13.11 mi0.68 mi2361+82263+62263+62083(Top 8%)1999(Top 13%)1999(Top 38%)
25K15.53 mi2.42 mi2278+832184+792184+791938(Top 7%)1855(Top 12%)1855(Top 35%)
30K18.64 mi3.11 mi2117+1612030+1542030+1541563(Top 6%)1496(Top 10%)1496(Top 28%)
20M20.00 mi1.36 mi2033+841948+821948+821325(Top 5%)1264(Top 8%)1264(Top 24%)
21M21.00 mi1.00 mi1925+1081842+1061842+106841(Top 3%)797(Top 5%)797(Top 15%)
35K21.75 mi0.75 mi1887+381806+361806+361177(Top 4%)1121(Top 7%)1121(Top 21%)
23M23.00 mi1.25 mi1831+561751+551751+551455(Top 5%)1382(Top 9%)1382(Top 26%)
24M24.00 mi1.00 mi1816+151736+151736+152010(Top 8%)1885(Top 12%)1885(Top 36%)
40K24.85 mi0.85 mi1785+311707+291707+291499(Top 6%)1413(Top 9%)1413(Top 27%)
25.2M25.20 mi0.35 mi1762+231683+241683+241464(Top 5%)1381(Top 9%)1381(Top 26%)
Finish26.22 mi1.02 mi1742+201664+191664+191728(Top 6%)1624(Top 11%)1624(Top 31%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21story building
+97ft-345ft

Overall

2420

Males

2321

M18-39

2321

5K→10K

3.1 - 6.2 mi

Top 9%
×5story building
+79ft-138ft

Overall

2474

Males

2365

M18-39

2365

10K→15K

6.2 - 9.3 mi

Top 9%
×3story building
+67ft-78ft

Overall

2420

Males

2321

M18-39

2321

15K→20K

9.3 - 12.4 mi

Top 8%
×5story building
+106ft-86ft

Overall

2019

Males

1938

M18-39

1938

20K→Half

12.4 - 13.1 mi

Top 8%
×2story building
+19ft-37ft

Overall

2083

Males

1999

M18-39

1999

Half→25K

13.1 - 15.5 mi

Top 7%
×4story building
+66ft-88ft

Overall

1938

Males

1855

M18-39

1855

25K→30K

15.5 - 18.6 mi

Top 6%
×9story building
+181ft-148ft

Overall

1563

Males

1496

M18-39

1496

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1325

Males

1264

M18-39

1264

20M→21M

20.0 - 21.0 mi

Top 3%
×8story building
+106ft-24ft

Overall

841

Males

797

M18-39

797

21M→35K

21.0 - 21.8 mi

Top 4%
×7story building
+17ft-86ft

Overall

1177

Males

1121

M18-39

1121

35K→23M

21.8 - 23.0 mi

Top 5%
×5story building
+23ft-63ft

Overall

1455

Males

1382

M18-39

1382

23M→24M

23.0 - 24.0 mi

Top 8%
×6story building
+12ft-82ft

Overall

2010

Males

1885

M18-39

1885

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1499

Males

1413

M18-39

1413

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1464

Males

1381

M18-39

1381

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2story building
+22ft-21ft

Overall

1728

Males

1624

M18-39

1624

Passing Analysis

Category:
Athletes Passed
1234
Passed By
239
Net Change
+995
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2737
5K → 10K22292+130#2737#2607
10K → 15K13339+94#2607#2513
15K → 20K1495+144#2513#2369
20K → Half168+8#2369#2361
Half → 25K9815+83#2361#2278
25K → 30K17110+161#2278#2117
30K → 20M906+84#2117#2033
20M → 21M1102+108#2033#1925
21M → 35K413+38#1925#1887
35K → 23M659+56#1887#1831
23M → 24M2914+15#1831#1816
24M → 40K4110+31#1816#1785
40K → 25.2M285+23#1785#1762
25.2M → Finish4121+20#1762#1742
TOTALS1234239+995
📊

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