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BOSTON MARATHON 2024

Spencer Castro

Bib: 668•M

CA

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 12%
Gender (Male)
#0 / 14578
Top 19%
Division (M18-39)
#0 / 4849
Top 40%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:17
Rank: #1672
Start → 5K
19:17 | 6:12/mi
10K· 6.21 mi
38:54
Rank: #1805 (-133)
5K → 10K
19:37 | 6:19/mi
15K· 9.32 mi
58:53
Rank: #1944 (-139)
10K → 15K
19:59 | 6:26/mi
20K· 12.43 mi
1:19:21
Rank: #2100 (-156)
15K → 20K
20:28 | 6:35/mi
Half· 13.11 mi
1:23:49
Rank: #2126 (-26)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:40:21
Rank: #2258 (-132)
Half → 25K
16:32 | 6:49/mi
30K· 18.64 mi
2:02:25
Rank: #2347 (-89)
25K → 30K
22:04 | 7:06/mi
20M
2:12:23
Rank: #2401 (-54)
30K → 20M
9:58 | 7:20/mi
21M
2:20:40
Rank: #2540 (-139)
20M → 21M
8:17 | 8:17/mi
35K· 21.75 mi
2:26:15
Rank: #2621 (-81)
21M → 35K
5:35 | 7:28/mi
23M
2:35:55
Rank: #2724 (-103)
35K → 23M
9:40 | 7:43/mi
24M
2:43:23
Rank: #2801 (-77)
23M → 24M
7:28 | 7:28/mi
40K· 24.85 mi
2:49:58
Rank: #2846 (-45)
24M → 40K
6:35 | 7:42/mi
25.2M
2:52:52
Rank: #2859 (-13)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:00:29
Rank: #2955 (-96)
25.2M → Finish
7:37 | 7:28/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:49
Pace6:24 /mi
2nd Half
Distance13.11 mi
Time1:36:40
Pace7:22 /mi
📊Positive Split: 15.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:3519:176:1219:17
6:12
-
10K
6.21 mi10:39:1238:546:1619:37
6:19
+0:07
15K
9.32 mi10:59:1158:536:1919:59
6:26
+0:07
20K
12.43 mi11:19:391:19:216:2320:28
6:35
+0:09
Half
13.11 mi11:24:071:23:496:244:28
6:33
-0:02
25K
15.53 mi11:40:391:40:216:2816:32
6:49
+0:16
30K
18.64 mi12:02:432:02:256:3422:04
7:06
+0:17
20M
20.00 mi12:12:412:12:236:379:58
7:20
+0:14
21M
21.00 mi12:20:582:20:406:428:17
8:17
+0:57
35K
21.75 mi12:26:332:26:156:435:35
7:28
-0:49
23M
23.00 mi12:36:132:35:556:479:40
7:43
+0:15
24M
24.00 mi12:43:412:43:236:487:28
7:28
-0:15
40K
24.85 mi12:50:162:49:586:506:35
7:42
+0:14
25.2M
25.20 mi12:53:102:52:526:522:54
8:25
+0:43
Finish
26.22 mi13:00:473:00:296:537:37
7:28
-0:57

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

6:12 /mi

Average Pace

6:53 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:21

56% of race

Time at Steady Pace

52:42

29% of race

Time at Slower Pace

27:26

15% of race

Average Pace: 6:53 /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 mi10:19:3519:176:1219:17
6:12
#1672
10K
6.21 mi10:39:1238:546:1619:37
6:19
#1805
15K
9.32 mi10:59:1158:536:1919:59
6:26
#1944
20K
12.43 mi11:19:391:19:216:2320:28
6:35
#2100
Half
13.11 mi11:24:071:23:496:244:28
6:33
#2126
25K
15.53 mi11:40:391:40:216:2816:32
6:49
#2258
30K
18.64 mi12:02:432:02:256:3422:04
7:06
#2347
20M
20.00 mi12:12:412:12:236:379:58
7:20
#2401
21M
21.00 mi12:20:582:20:406:428:17
8:17
#2540
35K
21.75 mi12:26:332:26:156:435:35
7:28
#2621
23M
23.00 mi12:36:132:35:556:479:40
7:43
#2724
24M
24.00 mi12:43:412:43:236:487:28
7:28
#2801
40K
24.85 mi12:50:162:49:586:506:35
7:42
#2846
25.2M
25.20 mi12:53:102:52:526:522:54
8:25
#2859
Finish
26.22 mi13:00:473:00:296:537:37
7:28
#2955
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1672161416142374(Top 9%)2287(Top 16%)2287(Top 47%)
10K6.21 mi3.10 mi1805-1331746-1321746-1321997(Top 8%)1933(Top 13%)1933(Top 40%)
15K9.32 mi3.11 mi1944-1391879-1331879-1332374(Top 9%)2287(Top 16%)2287(Top 47%)
20K12.43 mi3.11 mi2100-1562029-1502029-1502580(Top 10%)2465(Top 17%)2465(Top 51%)
Half13.11 mi0.68 mi2126-262054-252054-252918(Top 11%)2774(Top 19%)2774(Top 57%)
25K15.53 mi2.42 mi2258-1322176-1222176-1223336(Top 13%)3125(Top 21%)3125(Top 64%)
30K18.64 mi3.11 mi2347-892245-692245-693367(Top 13%)3092(Top 21%)3092(Top 64%)
20M20.00 mi1.36 mi2401-542294-492294-493714(Top 15%)3335(Top 23%)3335(Top 69%)
21M21.00 mi1.00 mi2540-1392415-1212415-1215287(Top 21%)4272(Top 29%)4272(Top 88%)
35K21.75 mi0.75 mi2621-812485-702485-704945(Top 19%)4059(Top 28%)4059(Top 84%)
23M23.00 mi1.25 mi2724-1032574-892574-894493(Top 18%)3675(Top 25%)3675(Top 76%)
24M24.00 mi1.00 mi2801-772637-632637-634043(Top 16%)3324(Top 23%)3324(Top 69%)
40K24.85 mi0.85 mi2846-452670-332670-334375(Top 17%)3416(Top 23%)3416(Top 70%)
25.2M25.20 mi0.35 mi2859-132671-12671-14185(Top 16%)3251(Top 22%)3251(Top 67%)
Finish26.22 mi1.02 mi2955-962752-812752-815539(Top 22%)4088(Top 28%)4088(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2374

Males

2287

M18-39

2287

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

1997

Males

1933

M18-39

1933

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2374

Males

2287

M18-39

2287

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2580

Males

2465

M18-39

2465

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

2918

Males

2774

M18-39

2774

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3336

Males

3125

M18-39

3125

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3367

Males

3092

M18-39

3092

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

3714

Males

3335

M18-39

3335

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5287

Males

4272

M18-39

4272

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

4945

Males

4059

M18-39

4059

35K→23M

21.8 - 23.0 mi

Top 18%
×5stories
+23ft-63ft

Overall

4493

Males

3675

M18-39

3675

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4043

Males

3324

M18-39

3324

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4375

Males

3416

M18-39

3416

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4185

Males

3251

M18-39

3251

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5539

Males

4088

M18-39

4088

Passing Analysis

Category:
Athletes Passed
541
Passed By
1824
Net Change
-1283
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1672
5K → 10K51184-133#1672#1805
10K → 15K38177-139#1805#1944
15K → 20K42198-156#1944#2100
20K → Half531-26#2100#2126
Half → 25K51183-132#2126#2258
25K → 30K97186-89#2258#2347
30K → 20M48102-54#2347#2401
20M → 21M23162-139#2401#2540
21M → 35K24105-81#2540#2621
35K → 23M39142-103#2621#2724
23M → 24M39116-77#2724#2801
24M → 40K3782-45#2801#2846
40K → 25.2M2235-13#2846#2859
25.2M → Finish25121-96#2859#2955
TOTALS5411824-1283
📊

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