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BOSTON MARATHON 2023

Zach Shaw

Bib: 25079•M

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 25%
Gender (Male)
#0 / 15176
Top 38%
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
6:49/mi
21:11
↑ 97↓ 3451.5%
10K· 6.21 mi
6:46/mi
42:11
↑ 79↓ 1380.4%
15K· 9.32 mi
6:55/mi
1:03:39
↑ 67↓ 78
20K· 12.43 mi
7:08/mi
1:25:50
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:30:44
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:48:59
↑ 66↓ 880.2%
30K· 18.64 mi
7:37/mi
2:12:40
↑ 181↓ 1480.2%
20M
7:40/mi
2:23:05
↑ 64↓ 500.2%
21M
7:55/mi
2:31:00
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:36:39
↑ 17↓ 861.7%
23M
8:02/mi
2:46:43
↑ 23↓ 630.6%
24M
7:39/mi
2:54:22
↓ 821.3%
40K· 24.85 mi
7:36/mi
3:00:52
↓ 200.3%
25.2M
8:04/mi
3:03:39
↑ 13↓ 160.2%
Finish· 26.22 mi
7:09/mi
3:10:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:44
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:40:12
Pace7:39 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:37:1621:116:4921:11
6:49
-
10K
6.21 mi11:58:1642:116:4721:00
6:46
-0:03
15K
9.32 mi12:19:441:03:396:5021:28
6:55
+0:09
20K
12.43 mi12:41:551:25:506:5422:11
7:08
+0:13
Half
13.11 mi12:46:491:30:446:554:54
7:11
+0:03
25K
15.53 mi13:05:041:48:597:0118:15
7:32
+0:21
30K
18.64 mi13:28:452:12:407:0723:41
7:37
+0:05
20M
20.00 mi13:39:102:23:057:0910:25
7:40
+0:03
21M
21.00 mi13:47:052:31:007:117:55
7:55
+0:15
35K
21.75 mi13:52:442:36:397:125:39
7:33
-0:22
23M
23.00 mi14:02:482:46:437:1510:04
8:02
+0:29
24M
24.00 mi14:10:272:54:227:167:39
7:39
-0:23
40K
24.85 mi14:16:573:00:527:176:30
7:36
-0:03
25.2M
25.20 mi14:19:443:03:397:172:47
8:04
+0:28
Finish
26.22 mi14:27:013:10:567:177:17
7:09
-0:55

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

6:46 /mi

Average Pace

7:17 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:01

51% of race

Time at Steady Pace

1:20:04

42% of race

Time at Slower Pace

12:51

7% of race

Average Pace: 7:17 /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 mi11:37:1621:116:4921:11
6:49
#4857
10K
6.21 mi11:58:1642:116:4721:00
6:46
#4877
15K
9.32 mi12:19:441:03:396:5021:28
6:55
#5262
20K
12.43 mi12:41:551:25:506:5422:11
7:08
#5750
Half
13.11 mi12:46:491:30:446:554:54
7:11
#5857
25K
15.53 mi13:05:041:48:597:0118:15
7:32
#6314
30K
18.64 mi13:28:452:12:407:0723:41
7:37
#6493
20M
20.00 mi13:39:102:23:057:0910:25
7:40
#6540
21M
21.00 mi13:47:052:31:007:117:55
7:55
#6525
35K
21.75 mi13:52:442:36:397:125:39
7:33
#6572
23M
23.00 mi14:02:482:46:437:1510:04
8:02
#6686
24M
24.00 mi14:10:272:54:227:167:39
7:39
#6717
40K
24.85 mi14:16:573:00:527:176:30
7:36
#6705
25.2M
25.20 mi14:19:443:03:397:172:47
8:04
#6689
Finish
26.22 mi14:27:013:10:567:177:17
7:09
#6629
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4857451645166020(Top 23%)5480(Top 36%)5480(Top 104%)
10K6.21 mi3.10 mi4877-204530-144530-144916(Top 18%)4561(Top 30%)4561(Top 86%)
15K9.32 mi3.11 mi5262-3854875-3454875-3456020(Top 23%)5480(Top 36%)5480(Top 104%)
20K12.43 mi3.11 mi5750-4885285-4105285-4106756(Top 25%)6031(Top 40%)6031(Top 114%)
Half13.11 mi0.68 mi5857-1075367-825367-827657(Top 29%)6664(Top 44%)6664(Top 126%)
25K15.53 mi2.42 mi6314-4575714-3475714-3478945(Top 34%)7392(Top 49%)7392(Top 140%)
30K18.64 mi3.11 mi6493-1795836-1225836-1228086(Top 30%)6728(Top 44%)6728(Top 127%)
20M20.00 mi1.36 mi6540-475859-235859-237886(Top 30%)6512(Top 43%)6512(Top 123%)
21M21.00 mi1.00 mi6525+155832+275832+276808(Top 26%)5742(Top 38%)5742(Top 109%)
35K21.75 mi0.75 mi6572-475859-275859-278851(Top 33%)6975(Top 46%)6975(Top 132%)
23M23.00 mi1.25 mi6686-1145933-745933-7410000(Top 38%)7469(Top 49%)7469(Top 141%)
24M24.00 mi1.00 mi6717-315940-75940-78703(Top 33%)6721(Top 44%)6721(Top 127%)
40K24.85 mi0.85 mi6705+125912+285912+287306(Top 27%)5805(Top 38%)5805(Top 110%)
25.2M25.20 mi0.35 mi6689+165888+245888+246862(Top 26%)5494(Top 36%)5494(Top 104%)
Finish26.22 mi1.02 mi6629+605837+515837+516084(Top 23%)4991(Top 33%)4991(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21story building
+97ft-345ft

Overall

6020

Males

5480

M18-39

5480

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

4916

Males

4561

M18-39

4561

10K→15K

6.2 - 9.3 mi

Top 23%
×3story building
+67ft-78ft

Overall

6020

Males

5480

M18-39

5480

15K→20K

9.3 - 12.4 mi

Top 25%
×5story building
+106ft-86ft

Overall

6756

Males

6031

M18-39

6031

20K→Half

12.4 - 13.1 mi

Top 29%
×2story building
+19ft-37ft

Overall

7657

Males

6664

M18-39

6664

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

8945

Males

7392

M18-39

7392

25K→30K

15.5 - 18.6 mi

Top 30%
×9story building
+181ft-148ft

Overall

8086

Males

6728

M18-39

6728

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

7886

Males

6512

M18-39

6512

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

6808

Males

5742

M18-39

5742

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

8851

Males

6975

M18-39

6975

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10000

Males

7469

M18-39

7469

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8703

Males

6721

M18-39

6721

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7306

Males

5805

M18-39

5805

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

6862

Males

5494

M18-39

5494

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6084

Males

4991

M18-39

4991

Passing Analysis

Category:
Athletes Passed
721
Passed By
2493
Net Change
-1772
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4857
5K → 10K179199-20#4857#4877
10K → 15K29414-385#4877#5262
15K → 20K25513-488#5262#5750
20K → Half4111-107#5750#5857
Half → 25K14471-457#5857#6314
25K → 30K66245-179#6314#6493
30K → 20M4895-47#6493#6540
20M → 21M6651+15#6540#6525
21M → 35K3481-47#6525#6572
35K → 23M32146-114#6572#6686
23M → 24M4172-31#6686#6717
24M → 40K6856+12#6717#6705
40K → 25.2M2913+16#6705#6689
25.2M → Finish8626+60#6689#6629
TOTALS7212493-1772
📊

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