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BOSTON MARATHON 2024

Zac Zarling

Bib: 9112•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Top 33%
Gender (Male)
#0 / 14578
Top 44%
Masters (Masters Men)
#0 / 9729
Top 34%
Division (M45-49)
#0 / 2218
Top 47%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:48
Rank: #14518
Start → 5K
24:48 | 7:59/mi
10K· 6.21 mi
49:01
Rank: #13534 (+984)
5K → 10K
24:13 | 7:48/mi
15K· 9.32 mi
1:13:45
Rank: #13401 (+133)
10K → 15K
24:44 | 7:58/mi
20K· 12.43 mi
1:38:46
Rank: #12988 (+413)
15K → 20K
25:01 | 8:03/mi
Half· 13.11 mi
1:44:17
Rank: #12994 (-6)
20K → Half
5:31 | 8:05/mi
25K· 15.53 mi
2:03:52
Rank: #12484 (+510)
Half → 25K
19:35 | 8:05/mi
30K· 18.64 mi
2:28:32
Rank: #11432 (+1052)
25K → 30K
24:40 | 7:56/mi
20M
2:39:06
Rank: #10859 (+573)
30K → 20M
10:34 | 7:47/mi
21M
2:47:16
Rank: #10391 (+468)
20M → 21M
8:10 | 8:10/mi
35K· 21.75 mi
2:52:42
Rank: #10093 (+298)
21M → 35K
5:26 | 7:16/mi
23M
3:02:06
Rank: #9534 (+559)
35K → 23M
9:24 | 7:30/mi
24M
3:09:28
Rank: #9163 (+371)
23M → 24M
7:22 | 7:22/mi
40K· 24.85 mi
3:15:48
Rank: #8817 (+346)
24M → 40K
6:20 | 7:24/mi
25.2M
3:18:35
Rank: #8644 (+173)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
3:25:40
Rank: #8341 (+303)
25.2M → Finish
7:05 | 6:57/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:44:17
Pace7:57 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:41:23
Pace7:44 /mi
📊Negative Split: 2.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5424:487:5924:48
7:59
-
10K
6.21 mi11:15:0749:017:5324:13
7:48
-0:11
15K
9.32 mi11:39:511:13:457:5524:44
7:58
+0:10
20K
12.43 mi12:04:521:38:467:5725:01
8:03
+0:05
Half
13.11 mi12:10:231:44:177:575:31
8:05
+0:02
25K
15.53 mi12:29:582:03:527:5819:35
8:05
0:00
30K
18.64 mi12:54:382:28:327:5824:40
7:56
-0:09
20M
20.00 mi13:05:122:39:067:5710:34
7:47
-0:09
21M
21.00 mi13:13:222:47:167:588:10
8:10
+0:23
35K
21.75 mi13:18:482:52:427:565:26
7:16
-0:54
23M
23.00 mi13:28:123:02:067:559:24
7:30
+0:14
24M
24.00 mi13:35:343:09:287:547:22
7:22
-0:08
40K
24.85 mi13:41:543:15:487:536:20
7:24
+0:02
25.2M
25.20 mi13:44:413:18:357:532:47
8:04
+0:40
Finish
26.22 mi13:51:463:25:407:517:05
6:57
-1:07

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

6:57 /mi

Average Pace

7:51 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

35:37

17% of race

Time at Steady Pace

2:50:03

83% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:51 /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 mi10:50:5424:487:5924:48
7:59
#14518
10K
6.21 mi11:15:0749:017:5324:13
7:48
#13534
15K
9.32 mi11:39:511:13:457:5524:44
7:58
#13401
20K
12.43 mi12:04:521:38:467:5725:01
8:03
#12988
Half
13.11 mi12:10:231:44:177:575:31
8:05
#12994
25K
15.53 mi12:29:582:03:527:5819:35
8:05
#12484
30K
18.64 mi12:54:382:28:327:5824:40
7:56
#11432
20M
20.00 mi13:05:122:39:067:5710:34
7:47
#10859
21M
21.00 mi13:13:222:47:167:588:10
8:10
#10391
35K
21.75 mi13:18:482:52:427:565:26
7:16
#10093
23M
23.00 mi13:28:123:02:067:559:24
7:30
#9534
24M
24.00 mi13:35:343:09:287:547:22
7:22
#9163
40K
24.85 mi13:41:543:15:487:536:20
7:24
#8817
25.2M
25.20 mi13:44:413:18:357:532:47
8:04
#8644
Finish
26.22 mi13:51:463:25:407:517:05
6:57
#8341
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi145189841984113149(Top 51%)9226(Top 63%)9226(Top 416%)
10K6.21 mi3.10 mi13534+9849446+3959446+39512583(Top 49%)9022(Top 62%)9022(Top 407%)
15K9.32 mi3.11 mi13401+1339383+639383+6313149(Top 51%)9226(Top 63%)9226(Top 416%)
20K12.43 mi3.11 mi12988+4139191+1929191+19212173(Top 48%)8726(Top 60%)8726(Top 393%)
Half13.11 mi0.68 mi12994-69179+129179+1213247(Top 52%)9157(Top 63%)9157(Top 413%)
25K15.53 mi2.42 mi12484+5108925+2548925+25410659(Top 42%)7830(Top 54%)7830(Top 353%)
30K18.64 mi3.11 mi11432+10528346+5798346+5797529(Top 29%)5940(Top 41%)5940(Top 268%)
20M20.00 mi1.36 mi10859+5738028+3188028+3185591(Top 22%)4616(Top 32%)4616(Top 208%)
21M21.00 mi1.00 mi10391+4687737+2917737+2914791(Top 19%)3971(Top 27%)3971(Top 179%)
35K21.75 mi0.75 mi10093+2987559+1787559+1784035(Top 16%)3486(Top 24%)3486(Top 157%)
23M23.00 mi1.25 mi9534+5597216+3437216+3433660(Top 14%)3154(Top 22%)3154(Top 142%)
24M24.00 mi1.00 mi9163+3716984+2326984+2323618(Top 14%)3069(Top 21%)3069(Top 138%)
40K24.85 mi0.85 mi8817+3466759+2256759+2253177(Top 12%)2688(Top 18%)2688(Top 121%)
25.2M25.20 mi0.35 mi8644+1736634+1256634+1252986(Top 12%)2523(Top 17%)2523(Top 114%)
Finish26.22 mi1.02 mi8341+3036429+2056429+2052958(Top 12%)2496(Top 17%)2496(Top 113%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13149

Males

9226

M45-49

9226

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

12583

Males

9022

M45-49

9022

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13149

Males

9226

M45-49

9226

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12173

Males

8726

M45-49

8726

20K→Half

12.4 - 13.1 mi

Top 52%
×2stories
+19ft-37ft

Overall

13247

Males

9157

M45-49

9157

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

10659

Males

7830

M45-49

7830

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

7529

Males

5940

M45-49

5940

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

5591

Males

4616

M45-49

4616

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

4791

Males

3971

M45-49

3971

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4035

Males

3486

M45-49

3486

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3660

Males

3154

M45-49

3154

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3618

Males

3069

M45-49

3069

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3177

Males

2688

M45-49

2688

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

2986

Males

2523

M45-49

2523

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

2958

Males

2496

M45-49

2496

Passing Analysis

Category:
Athletes Passed
6516*
Passed By
339
Net Change
+6177
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14518
5K → 10K101834+984#14518#13534
10K → 15K291158+133#13534#13401
15K → 20K48673+413#13401#12988
20K → Half4652-6#12988#12994
Half → 25K53020+510#12994#12484
25K → 30K10531+1052#12484#11432
30K → 20M5730+573#11432#10859
20M → 21M4680+468#10859#10391
21M → 35K2980+298#10391#10093
35K → 23M559*0+559#10093#9534
23M → 24M372*1+371#9534#9163
24M → 40K3460+346#9163#8817
40K → 25.2M1730+173#8817#8644
25.2M → Finish3030+303#8644#8341
TOTALS6516*339+6177

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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