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BOSTON MARATHON 2026

Alexander Castillo

Bib: 3451•M

WA

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0:00
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Overall
#0 / 29021
Top 18%
Gender (Male)
#0 / 16340
Top 29%
Age Group (M18-39)
#0 / 5723
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
21:04
3.11 mi
Rank: #6669
Start → 5K
21:04 | 6:47/mi
10K
41:50
6.21 mi
Rank: #6215 (+454)
5K → 10K
20:46 | 6:42/mi
15K
1:01:38
9.32 mi
Rank: #5064 (+1151)
10K → 15K
19:48 | 6:23/mi
20K
1:21:40
12.43 mi
Rank: #4577 (+487)
15K → 20K
20:02 | 6:27/mi
HALF
1:25:59
13.11 mi
Rank: #4494 (+83)
20K → HALF
4:19 | 6:20/mi
25K
1:41:46
15.53 mi
Rank: #4307 (+187)
HALF → 25K
15:47 | 6:31/mi
30K
2:02:40
18.64 mi
Rank: #4193 (+114)
25K → 30K
20:54 | 6:44/mi
20M
2:11:51
20.00 mi
Rank: #4125 (+68)
30K → 20M
9:11 | 6:46/mi
21M
2:19:07
21.00 mi
Rank: #4139 (-14)
20M → 21M
7:16 | 7:16/mi
35K
2:24:29
21.75 mi
Rank: #4261 (-122)
21M → 35K
5:22 | 7:11/mi
23M
2:34:17
23.00 mi
Rank: #4632 (-371)
35K → 23M
9:48 | 7:50/mi
24M
2:41:54
24.00 mi
Rank: #4905 (-273)
23M → 24M
7:37 | 7:37/mi
40K
2:48:33
24.85 mi
Rank: #5121 (-216)
24M → 40K
6:39 | 7:47/mi
25.2M
2:51:19
25.20 mi
Rank: #5178 (-57)
40K → 25.2M
2:46 | 8:02/mi
FINISH
2:58:14
26.22 mi
Rank: #5198 (-20)
25.2M → FINISH
6:55 | 6:48/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:25:59
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:32:15
Pace7:03 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:0621:046:4721:04
6:47
-
10K
6.21 mi10:44:5241:506:4420:46
6:42
-0:05
15K
9.32 mi11:04:401:01:386:3719:48
6:23
-0:19
20K
12.43 mi11:24:421:21:406:3520:02
6:27
+0:04
HALF
13.11 mi11:29:011:25:596:344:19
6:20
-0:07
25K
15.53 mi11:44:481:41:466:3415:47
6:31
+0:11
30K
18.64 mi12:05:422:02:406:3520:54
6:44
+0:13
20M
20.00 mi12:14:532:11:516:369:11
6:46
+0:02
21M
21.00 mi12:22:092:19:076:387:16
7:16
+0:30
35K
21.75 mi12:27:312:24:296:395:22
7:11
-0:05
23M
23.00 mi12:37:192:34:176:439:48
7:50
+0:39
24M
24.00 mi12:44:562:41:546:457:37
7:37
-0:13
40K
24.85 mi12:51:352:48:336:476:39
7:47
+0:10
25.2M
25.20 mi12:54:212:51:196:482:46
8:02
+0:15
FINISH
26.22 mi13:01:162:58:146:496:55
6:48
-1:14

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

6:20 /mi

Average Pace

6:48 /mi

Slowest Pace

8:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

44:09

25% of race

Time at Steady Pace

1:34:37

53% of race

Time at Slower Pace

39:28

22% of race

Average Pace: 6:48 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:24:0621:046:4721:04
6:47
#6669
10K
6.21 mi10:44:5241:506:4420:46
6:42
#6215
15K
9.32 mi11:04:401:01:386:3719:48
6:23
#5064
20K
12.43 mi11:24:421:21:406:3520:02
6:27
#4577
HALF
13.11 mi11:29:011:25:596:344:19
6:20
#4494
25K
15.53 mi11:44:481:41:466:3415:47
6:31
#4307
30K
18.64 mi12:05:422:02:406:3520:54
6:44
#4193
20M
20.00 mi12:14:532:11:516:369:11
6:46
#4125
21M
21.00 mi12:22:092:19:076:387:16
7:16
#4139
35K
21.75 mi12:27:312:24:296:395:22
7:11
#4261
23M
23.00 mi12:37:192:34:176:439:48
7:50
#4632
24M
24.00 mi12:44:562:41:546:457:37
7:37
#4905
40K
24.85 mi12:51:352:48:336:476:39
7:47
#5121
25.2M
25.20 mi12:54:212:51:196:482:46
8:02
#5178
FINISH
26.22 mi13:01:162:58:146:496:55
6:48
#5198
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6669597359733358(Top 12%)3209(Top 20%)3209(Top 56%)
10K6.21 mi3.10 mi6215+4545636+3375636+3375784(Top 20%)5290(Top 32%)5290(Top 92%)
15K9.32 mi3.11 mi5064+11514720+9164720+9163358(Top 12%)3209(Top 20%)3209(Top 56%)
20K12.43 mi3.11 mi4577+4874299+4214299+4213445(Top 12%)3295(Top 20%)3295(Top 58%)
HALF13.11 mi0.68 mi4494+834229+704229+703301(Top 11%)3177(Top 19%)3177(Top 56%)
25K15.53 mi2.42 mi4307+1874062+1674062+1673504(Top 12%)3330(Top 20%)3330(Top 58%)
30K18.64 mi3.11 mi4193+1143951+1113951+1113869(Top 13%)3609(Top 22%)3609(Top 63%)
20M20.00 mi1.36 mi4125+683883+683883+683883(Top 13%)3584(Top 22%)3584(Top 63%)
21M21.00 mi1.00 mi4139-143891-83891-85052(Top 17%)4436(Top 27%)4436(Top 78%)
35K21.75 mi0.75 mi4261-1223992-1013992-1018283(Top 29%)6554(Top 40%)6554(Top 115%)
23M23.00 mi1.25 mi4632-3714295-3034295-30311200(Top 39%)7936(Top 49%)7936(Top 139%)
24M24.00 mi1.00 mi4905-2734516-2214516-22110921(Top 38%)7742(Top 47%)7742(Top 135%)
40K24.85 mi0.85 mi5121-2164672-1564672-15610813(Top 37%)7591(Top 46%)7591(Top 133%)
25.2M25.20 mi0.35 mi5178-574715-434715-438386(Top 29%)6282(Top 38%)6282(Top 110%)
FINISH26.22 mi1.02 mi5198-204714+14714+15990(Top 21%)4849(Top 30%)4849(Top 85%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21
+97ft-345ft

Overall

3358

Males

3209

M18-39

3209

5K→10K

3.1 - 6.2 mi

Top 20%
×5
+79ft-138ft

Overall

5784

Males

5290

M18-39

5290

10K→15K

6.2 - 9.3 mi

Top 12%
×3
+67ft-78ft

Overall

3358

Males

3209

M18-39

3209

15K→20K

9.3 - 12.4 mi

Top 12%
×5
+106ft-86ft

Overall

3445

Males

3295

M18-39

3295

20K→HALF

12.4 - 13.1 mi

Top 11%
×2
+19ft-37ft

Overall

3301

Males

3177

M18-39

3177

HALF→25K

13.1 - 15.5 mi

Top 12%
×4
+66ft-88ft

Overall

3504

Males

3330

M18-39

3330

25K→30K

15.5 - 18.6 mi

Top 13%
×9
+181ft-148ft

Overall

3869

Males

3609

M18-39

3609

30K→20M

18.6 - 20.0 mi

Top 13%
×5
+64ft-50ft

Overall

3883

Males

3584

M18-39

3584

20M→21M

20.0 - 21.0 mi

Top 17%
×8
+106ft-24ft

Overall

5052

Males

4436

M18-39

4436

21M→35K

21.0 - 21.8 mi

Top 29%
×7
+17ft-86ft

Overall

8283

Males

6554

M18-39

6554

35K→23M

21.8 - 23.0 mi

Top 39%
×5
+23ft-63ft

Overall

11200

Males

7936

M18-39

7936

23M→24M

23.0 - 24.0 mi

Top 38%
×6
+12ft-82ft

Overall

10921

Males

7742

M18-39

7742

24M→40K

24.0 - 24.9 mi

Top 37%
×1
+6ft-20ft

Overall

10813

Males

7591

M18-39

7591

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1
+13ft-16ft

Overall

8386

Males

6282

M18-39

6282

25.2M→FINISH

25.2 - 26.2 mi

Top 21%
×2
+22ft-21ft

Overall

5990

Males

4849

M18-39

4849

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2844*
Passed By
1059
Net Change
+1471
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6669
5K → 10K493*39+454#6669#6215
10K → 15K1152*1+1151#6215#5064
15K → 20K487*0+487#5064#4577
20K → HALF841+83#4577#4494
HALF → 25K1914+187#4494#4307
25K → 30K16248+114#4307#4193
30K → 20M8921+68#4193#4125
20M → 21M4559-14#4125#4139
21M → 35K19141-122#4139#4261
35K → 23M19200-371#4261#4632
23M → 24M14200-273#4632#4905
24M → 40K21200-216#4905#5121
40K → 25.2M1269-57#5121#5178
25.2M → FINISH5676-20#5178#5198
TOTALS2844*1059+1471

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

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing