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BOSTON MARATHON 2024

Merlin Calo

Bib: 14991•M

MA

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

⏱️ 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
8:07/mi
25:12
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
50:26
↑ 79↓ 1380.4%
15K· 9.32 mi
8:30/mi
1:16:50
↑ 67↓ 78
20K· 12.43 mi
8:45/mi
1:44:02
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:49:26
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:10:14
↑ 66↓ 880.2%
30K· 18.64 mi
10:00/mi
2:41:19
↑ 181↓ 1480.2%
20M
11:04/mi
2:56:21
↑ 64↓ 500.2%
21M
11:41/mi
3:08:02
↑ 106↓ 241.6%
35K· 21.75 mi
9:01/mi
3:14:47
↑ 17↓ 861.7%
23M
11:51/mi
3:29:37
↑ 23↓ 630.6%
24M
9:38/mi
3:39:15
↓ 821.3%
40K· 24.85 mi
10:41/mi
3:48:23
↓ 200.3%
25.2M
13:46/mi
3:53:08
↑ 13↓ 160.2%
Finish· 26.22 mi
13:02/mi
4:06:25
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:26
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time2:16:59
Pace10:27 /mi
📊Positive Split: 25.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4125:128:0725:12
8:07
-
10K
6.21 mi11:43:5550:268:0725:14
8:07
0:00
15K
9.32 mi12:10:191:16:508:1526:24
8:30
+0:23
20K
12.43 mi12:37:311:44:028:2227:12
8:45
+0:15
Half
13.11 mi12:42:551:49:268:215:24
7:55
-0:50
25K
15.53 mi13:03:432:10:148:2320:48
8:35
+0:40
30K
18.64 mi13:34:482:41:198:3931:05
10:00
+1:25
20M
20.00 mi13:49:502:56:218:4915:02
11:04
+1:04
21M
21.00 mi14:01:313:08:028:5711:41
11:41
+0:37
35K
21.75 mi14:08:163:14:478:576:45
9:01
-2:40
23M
23.00 mi14:23:063:29:379:0714:50
11:51
+2:50
24M
24.00 mi14:32:443:39:159:089:38
9:38
-2:13
40K
24.85 mi14:41:523:48:239:119:08
10:41
+1:03
25.2M
25.20 mi14:46:373:53:089:154:45
13:46
+3:05
Finish
26.22 mi14:59:544:06:259:2413:17
13:02
-0:44

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

7:55 /mi

Average Pace

9:24 /mi

Slowest Pace

13:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:02

42% of race

Time at Steady Pace

1:14:40

30% of race

Time at Slower Pace

1:08:43

28% of race

Average Pace: 9:24 /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 mi11:18:4125:128:0725:12
8:07
#15448
10K
6.21 mi11:43:5550:268:0725:14
8:07
#15215
15K
9.32 mi12:10:191:16:508:1526:24
8:30
#15596
20K
12.43 mi12:37:311:44:028:2227:12
8:45
#15673
Half
13.11 mi12:42:551:49:268:215:24
7:55
#15507
25K
15.53 mi13:03:432:10:148:2320:48
8:35
#15109
30K
18.64 mi13:34:482:41:198:3931:05
10:00
#15644
20M
20.00 mi13:49:502:56:218:4915:02
11:04
#16116
21M
21.00 mi14:01:313:08:028:5711:41
11:41
#16324
35K
21.75 mi14:08:163:14:478:576:45
9:01
#16210
23M
23.00 mi14:23:063:29:379:0714:50
11:51
#16637
24M
24.00 mi14:32:443:39:159:089:38
9:38
#16552
40K
24.85 mi14:41:523:48:239:119:08
10:41
#16588
25.2M
25.20 mi14:46:373:53:089:154:45
13:46
#16692
Finish
26.22 mi14:59:544:06:259:2413:17
13:02
#17206
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi15448101931019316379(Top 64%)10549(Top 72%)10549(Top 476%)
10K6.21 mi3.10 mi15215+23310113+8010113+8015003(Top 59%)10033(Top 69%)10033(Top 452%)
15K9.32 mi3.11 mi15596-38110254-14110254-14116379(Top 64%)10549(Top 72%)10549(Top 476%)
20K12.43 mi3.11 mi15673-7710260-610260-616131(Top 63%)10433(Top 72%)10433(Top 470%)
Half13.11 mi0.68 mi15507+16610198+6210198+6212140(Top 48%)8727(Top 60%)8727(Top 393%)
25K15.53 mi2.42 mi15109+39810010+18810010+18813473(Top 53%)9142(Top 63%)9142(Top 412%)
30K18.64 mi3.11 mi15644-53510150-14010150-14017358(Top 68%)10613(Top 73%)10613(Top 478%)
20M20.00 mi1.36 mi16116-47210305-15510305-15519421(Top 76%)11455(Top 79%)11455(Top 516%)
21M21.00 mi1.00 mi16324-20810352-4710352-4718075(Top 71%)10680(Top 73%)10680(Top 482%)
35K21.75 mi0.75 mi16210+11410277+7510277+7513410(Top 52%)8372(Top 57%)8372(Top 377%)
23M23.00 mi1.25 mi16637-42710440-16310440-16320396(Top 80%)11758(Top 81%)11758(Top 530%)
24M24.00 mi1.00 mi16552+8510371+6910371+6915004(Top 59%)9021(Top 62%)9021(Top 407%)
40K24.85 mi0.85 mi16588-3610353+1810353+1817212(Top 67%)10043(Top 69%)10043(Top 453%)
25.2M25.20 mi0.35 mi16692-10410387-3410387-3421189(Top 83%)12055(Top 83%)12055(Top 544%)
Finish26.22 mi1.02 mi17206-51410573-18610573-18624375(Top 95%)13791(Top 95%)13791(Top 622%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16379

Males

10549

M45-49

10549

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15003

Males

10033

M45-49

10033

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16379

Males

10549

M45-49

10549

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16131

Males

10433

M45-49

10433

20K→Half

12.4 - 13.1 mi

Top 48%
×2story building
+19ft-37ft

Overall

12140

Males

8727

M45-49

8727

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

13473

Males

9142

M45-49

9142

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

17358

Males

10613

M45-49

10613

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

19421

Males

11455

M45-49

11455

20M→21M

20.0 - 21.0 mi

Top 71%
×8story building
+106ft-24ft

Overall

18075

Males

10680

M45-49

10680

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13410

Males

8372

M45-49

8372

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

20396

Males

11758

M45-49

11758

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

15004

Males

9021

M45-49

9021

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17212

Males

10043

M45-49

10043

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

21189

Males

12055

M45-49

12055

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2story building
+22ft-21ft

Overall

24375

Males

13791

M45-49

13791

Passing Analysis

Category:
Athletes Passed
1934
Passed By
3692
Net Change
-1758
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15448
5K → 10K394161+233#15448#15215
10K → 15K136517-381#15215#15596
15K → 20K215292-77#15596#15673
20K → Half1671+166#15673#15507
Half → 25K43537+398#15507#15109
25K → 30K118653-535#15109#15644
30K → 20M34506-472#15644#16116
20M → 21M49257-208#16116#16324
21M → 35K13016+114#16324#16210
35K → 23M27454-427#16210#16637
23M → 24M12237+85#16637#16552
24M → 40K74110-36#16552#16588
40K → 25.2M14118-104#16588#16692
25.2M → Finish19533-514#16692#17206
TOTALS19343692-1758
📊

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