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BOSTON MARATHON 2023

Isaac Gray

Bib: 4578•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 6%
Gender (Male)
#0 / 15176
Top 9%
Division (M18-39)
#0 / 5285
Top 22%
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
6:29/mi
20:09
↑ 97↓ 3451.5%
10K· 6.21 mi
6:11/mi
39:23
↑ 79↓ 1380.4%
15K· 9.32 mi
6:15/mi
58:49
↑ 67↓ 78
20K· 12.43 mi
6:20/mi
1:18:29
↑ 106↓ 860.1%
Half· 13.11 mi
6:11/mi
1:22:42
↑ 19↓ 370.5%
25K· 15.53 mi
6:18/mi
1:37:59
↑ 66↓ 880.2%
30K· 18.64 mi
6:40/mi
1:58:41
↑ 181↓ 1480.2%
20M
6:34/mi
2:07:36
↑ 64↓ 500.2%
21M
6:53/mi
2:14:29
↑ 106↓ 241.6%
35K· 21.75 mi
6:14/mi
2:19:09
↑ 17↓ 861.7%
23M
6:38/mi
2:27:27
↑ 23↓ 630.6%
24M
6:15/mi
2:33:42
↓ 821.3%
40K· 24.85 mi
6:20/mi
2:39:07
↓ 200.3%
25.2M
6:52/mi
2:41:29
↑ 13↓ 160.2%
Finish· 26.22 mi
6:27/mi
2:48:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:42
Pace6:18 /mi
2nd Half
Distance13.11 mi
Time1:25:21
Pace6:31 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5520:096:2920:09
6:29
-
10K
6.21 mi10:41:0939:236:2019:14
6:11
-0:18
15K
9.32 mi11:00:3558:496:1919:26
6:15
+0:04
20K
12.43 mi11:20:151:18:296:1919:40
6:20
+0:05
Half
13.11 mi11:24:281:22:426:184:13
6:11
-0:09
25K
15.53 mi11:39:451:37:596:1815:17
6:18
+0:07
30K
18.64 mi12:00:271:58:416:2220:42
6:40
+0:22
20M
20.00 mi12:09:222:07:366:238:55
6:34
-0:06
21M
21.00 mi12:16:152:14:296:246:53
6:53
+0:19
35K
21.75 mi12:20:552:19:096:244:40
6:14
-0:39
23M
23.00 mi12:29:132:27:276:258:18
6:38
+0:24
24M
24.00 mi12:35:282:33:426:246:15
6:15
-0:23
40K
24.85 mi12:40:532:39:076:245:25
6:20
+0:05
25.2M
25.20 mi12:43:152:41:296:242:22
6:52
+0:32
Finish
26.22 mi12:49:492:48:036:256:34
6:27
-0:25

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

6:11 /mi

Average Pace

6:25 /mi

Slowest Pace

6:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:38:48

94% of race

Time at Steady Pace

9:15

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:25 /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 mi10:21:5520:096:2920:09
6:29
#2189
10K
6.21 mi10:41:0939:236:2019:14
6:11
#1737
15K
9.32 mi11:00:3558:496:1919:26
6:15
#1631
20K
12.43 mi11:20:151:18:296:1919:40
6:20
#1589
Half
13.11 mi11:24:281:22:426:184:13
6:11
#1573
25K
15.53 mi11:39:451:37:596:1815:17
6:18
#1527
30K
18.64 mi12:00:271:58:416:2220:42
6:40
#1613
20M
20.00 mi12:09:222:07:366:238:55
6:34
#1605
21M
21.00 mi12:16:152:14:296:246:53
6:53
#1588
35K
21.75 mi12:20:552:19:096:244:40
6:14
#1570
23M
23.00 mi12:29:132:27:276:258:18
6:38
#1562
24M
24.00 mi12:35:282:33:426:246:15
6:15
#1527
40K
24.85 mi12:40:532:39:076:245:25
6:20
#1485
25.2M
25.20 mi12:43:152:41:296:242:22
6:52
#1481
Finish
26.22 mi12:49:492:48:036:256:34
6:27
#1483
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2189208820881448(Top 5%)1381(Top 9%)1381(Top 26%)
10K6.21 mi3.10 mi1737+4521660+4281660+4281317(Top 5%)1254(Top 8%)1254(Top 24%)
15K9.32 mi3.11 mi1631+1061558+1021558+1021448(Top 5%)1381(Top 9%)1381(Top 26%)
20K12.43 mi3.11 mi1589+421518+401518+401520(Top 6%)1452(Top 10%)1452(Top 27%)
Half13.11 mi0.68 mi1573+161503+151503+151303(Top 5%)1251(Top 8%)1251(Top 24%)
25K15.53 mi2.42 mi1527+461459+441459+441358(Top 5%)1298(Top 9%)1298(Top 25%)
30K18.64 mi3.11 mi1613-861544-851544-852224(Top 8%)2120(Top 14%)2120(Top 40%)
20M20.00 mi1.36 mi1605+81534+101534+101677(Top 6%)1600(Top 11%)1600(Top 30%)
21M21.00 mi1.00 mi1588+171518+161518+161688(Top 6%)1604(Top 11%)1604(Top 30%)
35K21.75 mi0.75 mi1570+181501+171501+171357(Top 5%)1287(Top 8%)1287(Top 24%)
23M23.00 mi1.25 mi1562+81492+91492+91875(Top 7%)1777(Top 12%)1777(Top 34%)
24M24.00 mi1.00 mi1527+351458+341458+341196(Top 4%)1133(Top 7%)1133(Top 21%)
40K24.85 mi0.85 mi1485+421417+411417+411008(Top 4%)955(Top 6%)955(Top 18%)
25.2M25.20 mi0.35 mi1481+41414+31414+31319(Top 5%)1249(Top 8%)1249(Top 24%)
Finish26.22 mi1.02 mi1483-21416-21416-22192(Top 8%)2032(Top 13%)2032(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21story building
+97ft-345ft

Overall

1448

Males

1381

M18-39

1381

5K→10K

3.1 - 6.2 mi

Top 5%
×5story building
+79ft-138ft

Overall

1317

Males

1254

M18-39

1254

10K→15K

6.2 - 9.3 mi

Top 5%
×3story building
+67ft-78ft

Overall

1448

Males

1381

M18-39

1381

15K→20K

9.3 - 12.4 mi

Top 6%
×5story building
+106ft-86ft

Overall

1520

Males

1452

M18-39

1452

20K→Half

12.4 - 13.1 mi

Top 5%
×2story building
+19ft-37ft

Overall

1303

Males

1251

M18-39

1251

Half→25K

13.1 - 15.5 mi

Top 5%
×4story building
+66ft-88ft

Overall

1358

Males

1298

M18-39

1298

25K→30K

15.5 - 18.6 mi

Top 8%
×9story building
+181ft-148ft

Overall

2224

Males

2120

M18-39

2120

30K→20M

18.6 - 20.0 mi

Top 6%
×5story building
+64ft-50ft

Overall

1677

Males

1600

M18-39

1600

20M→21M

20.0 - 21.0 mi

Top 6%
×8story building
+106ft-24ft

Overall

1688

Males

1604

M18-39

1604

21M→35K

21.0 - 21.8 mi

Top 5%
×7story building
+17ft-86ft

Overall

1357

Males

1287

M18-39

1287

35K→23M

21.8 - 23.0 mi

Top 7%
×5story building
+23ft-63ft

Overall

1875

Males

1777

M18-39

1777

23M→24M

23.0 - 24.0 mi

Top 4%
×6story building
+12ft-82ft

Overall

1196

Males

1133

M18-39

1133

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1008

Males

955

M18-39

955

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1319

Males

1249

M18-39

1249

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2story building
+22ft-21ft

Overall

2192

Males

2032

M18-39

2032

Passing Analysis

Category:
Athletes Passed
990
Passed By
284
Net Change
+706
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2189
5K → 10K4542+452#2189#1737
10K → 15K12216+106#1737#1631
15K → 20K6927+42#1631#1589
20K → Half193+16#1589#1573
Half → 25K5913+46#1573#1527
25K → 30K31117-86#1527#1613
30K → 20M2416+8#1613#1605
20M → 21M3417+17#1605#1588
21M → 35K224+18#1588#1570
35K → 23M3224+8#1570#1562
23M → 24M449+35#1562#1527
24M → 40K486+42#1527#1485
40K → 25.2M139+4#1485#1481
25.2M → Finish1921-2#1481#1483
TOTALS990284+706
📊

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