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BOSTON MARATHON 2023

Zac Cross

Bib: 30661•M

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
7:53/mi
24:31
↑ 97↓ 3451.5%
10K· 6.21 mi
7:46/mi
48:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:47/mi
1:12:50
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:37:46
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:43:20
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:05:20
↑ 66↓ 880.2%
30K· 18.64 mi
8:54/mi
2:33:00
↑ 181↓ 1480.2%
20M
9:16/mi
2:45:35
↑ 64↓ 500.2%
21M
10:41/mi
2:56:16
↑ 106↓ 241.6%
35K· 21.75 mi
8:48/mi
3:02:51
↑ 17↓ 861.7%
23M
10:01/mi
3:15:23
↑ 23↓ 630.6%
24M
9:38/mi
3:25:01
↓ 821.3%
40K· 24.85 mi
9:52/mi
3:33:27
↓ 200.3%
25.2M
13:52/mi
3:38:14
↑ 13↓ 160.2%
Finish· 26.22 mi
9:24/mi
3:47:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:20
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time2:04:29
Pace9:30 /mi
📊Positive Split: 20.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:1324:317:5324:31
7:53
-
10K
6.21 mi12:07:2148:397:5024:08
7:46
-0:07
15K
9.32 mi12:31:321:12:507:4924:11
7:47
+0:01
20K
12.43 mi12:56:281:37:467:5224:56
8:02
+0:15
Half
13.11 mi13:02:021:43:207:535:34
8:10
+0:08
25K
15.53 mi13:24:022:05:208:0422:00
9:04
+0:54
30K
18.64 mi13:51:422:33:008:1227:40
8:54
-0:10
20M
20.00 mi14:04:172:45:358:1712:35
9:16
+0:22
21M
21.00 mi14:14:582:56:168:2410:41
10:41
+1:25
35K
21.75 mi14:21:333:02:518:246:35
8:48
-1:53
23M
23.00 mi14:34:053:15:238:3012:32
10:01
+1:13
24M
24.00 mi14:43:433:25:018:339:38
9:38
-0:23
40K
24.85 mi14:52:093:33:278:358:26
9:52
+0:14
25.2M
25.20 mi14:56:563:38:148:404:47
13:52
+4:00
Finish
26.22 mi15:06:313:47:498:429:35
9:24
-4:28

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

7:46 /mi

Average Pace

8:42 /mi

Slowest Pace

13:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:20

45% of race

Time at Steady Pace

1:28:03

39% of race

Time at Slower Pace

36:26

16% of race

Average Pace: 8:41 /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 mi11:43:1324:317:5324:31
7:53
#13156
10K
6.21 mi12:07:2148:397:5024:08
7:46
#12971
15K
9.32 mi12:31:321:12:507:4924:11
7:47
#12816
20K
12.43 mi12:56:281:37:467:5224:56
8:02
#13011
Half
13.11 mi13:02:021:43:207:535:34
8:10
#13156
25K
15.53 mi13:24:022:05:208:0422:00
9:04
#14411
30K
18.64 mi13:51:422:33:008:1227:40
8:54
#14870
20M
20.00 mi14:04:172:45:358:1712:35
9:16
#15090
21M
21.00 mi14:14:582:56:168:2410:41
10:41
#15482
35K
21.75 mi14:21:333:02:518:246:35
8:48
#15547
23M
23.00 mi14:34:053:15:238:3012:32
10:01
#15924
24M
24.00 mi14:43:433:25:018:339:38
9:38
#16139
40K
24.85 mi14:52:093:33:278:358:26
9:52
#16303
25.2M
25.20 mi14:56:563:38:148:404:47
13:52
#16661
Finish
26.22 mi15:06:313:47:498:429:35
9:24
#16817
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi131569614961412587(Top 47%)9345(Top 62%)9345(Top 177%)
10K6.21 mi3.10 mi12971+1859524+909524+9012838(Top 48%)9488(Top 63%)9488(Top 180%)
15K9.32 mi3.11 mi12816+1559455+699455+6912587(Top 47%)9345(Top 62%)9345(Top 177%)
20K12.43 mi3.11 mi13011-1959505-509505-5013647(Top 51%)9731(Top 64%)9731(Top 184%)
Half13.11 mi0.68 mi13156-1459565-609565-6015479(Top 58%)10496(Top 69%)10496(Top 199%)
25K15.53 mi2.42 mi14411-125510041-47610041-47619289(Top 72%)11965(Top 79%)11965(Top 226%)
30K18.64 mi3.11 mi14870-45910192-15110192-15116668(Top 63%)10776(Top 71%)10776(Top 204%)
20M20.00 mi1.36 mi15090-22010243-5110243-5117827(Top 67%)11153(Top 73%)11153(Top 211%)
21M21.00 mi1.00 mi15482-39210357-11410357-11420083(Top 75%)12085(Top 80%)12085(Top 229%)
35K21.75 mi0.75 mi15547-6510361-410361-416914(Top 64%)10663(Top 70%)10663(Top 202%)
23M23.00 mi1.25 mi15924-37710486-12510486-12520010(Top 75%)12024(Top 79%)12024(Top 228%)
24M24.00 mi1.00 mi16139-21510581-9510581-9519667(Top 74%)11847(Top 78%)11847(Top 224%)
40K24.85 mi0.85 mi16303-16410627-4610627-4619572(Top 74%)11732(Top 77%)11732(Top 222%)
25.2M25.20 mi0.35 mi16661-35810775-14810775-14824881(Top 93%)14220(Top 94%)14220(Top 269%)
Finish26.22 mi1.02 mi16817-15610828-5310828-5319758(Top 74%)11863(Top 78%)11863(Top 224%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

12587

Males

9345

M18-39

9345

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12838

Males

9488

M18-39

9488

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

12587

Males

9345

M18-39

9345

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13647

Males

9731

M18-39

9731

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15479

Males

10496

M18-39

10496

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19289

Males

11965

M18-39

11965

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16668

Males

10776

M18-39

10776

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17827

Males

11153

M18-39

11153

20M→21M

20.0 - 21.0 mi

Top 75%
×8story building
+106ft-24ft

Overall

20083

Males

12085

M18-39

12085

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

16914

Males

10663

M18-39

10663

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

20010

Males

12024

M18-39

12024

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19667

Males

11847

M18-39

11847

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

19572

Males

11732

M18-39

11732

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24881

Males

14220

M18-39

14220

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

19758

Males

11863

M18-39

11863

Passing Analysis

Category:
Athletes Passed
1107
Passed By
4768
Net Change
-3661
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13156
5K → 10K420235+185#13156#12971
10K → 15K287132+155#12971#12816
15K → 20K133328-195#12816#13011
20K → Half5150-145#13011#13156
Half → 25K131268-1255#13156#14411
25K → 30K61520-459#14411#14870
30K → 20M36256-220#14870#15090
20M → 21M20412-392#15090#15482
21M → 35K2792-65#15482#15547
35K → 23M18395-377#15547#15924
23M → 24M25240-215#15924#16139
24M → 40K31195-164#16139#16303
40K → 25.2M2360-358#16303#16661
25.2M → Finish29185-156#16661#16817
TOTALS11074768-3661
📊

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