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BOSTON MARATHON 2026

Claudia Castillo

Bib: 22853•F

WI

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 41%
Age Group (F45-49)
#0 / 1786
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
27:00
3.11 mi
Rank: #21129
Start → 5K
27:00 | 8:42/mi
10K
53:18
6.21 mi
Rank: #20611 (+518)
5K → 10K
26:18 | 8:28/mi
15K
1:19:24
9.32 mi
Rank: #20237 (+374)
10K → 15K
26:06 | 8:25/mi
20K
1:45:39
12.43 mi
Rank: #19925 (+312)
15K → 20K
26:15 | 8:27/mi
HALF
1:51:21
13.11 mi
Rank: #19904 (+21)
20K → HALF
5:42 | 8:22/mi
25K
2:11:43
15.53 mi
Rank: #19611 (+293)
HALF → 25K
20:22 | 8:24/mi
30K
2:38:21
18.64 mi
Rank: #19161 (+450)
25K → 30K
26:38 | 8:35/mi
20M
2:49:39
20.00 mi
Rank: #18868 (+293)
30K → 20M
11:18 | 8:20/mi
21M
2:58:37
21.00 mi
Rank: #18683 (+185)
20M → 21M
8:58 | 8:58/mi
35K
3:04:31
21.75 mi
Rank: #18525 (+158)
21M → 35K
5:54 | 7:54/mi
23M
3:15:05
23.00 mi
Rank: #18342 (+183)
35K → 23M
10:34 | 8:27/mi
24M
3:23:16
24.00 mi
Rank: #18202 (+140)
23M → 24M
8:11 | 8:11/mi
40K
3:30:30
24.85 mi
Rank: #18084 (+118)
24M → 40K
7:14 | 8:28/mi
25.2M
3:33:29
25.20 mi
Rank: #17988 (+96)
40K → 25.2M
2:59 | 8:40/mi
FINISH
3:41:23
26.22 mi
Rank: #17795 (+193)
25.2M → FINISH
7:54 | 7:46/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time1:51:21
Pace8:30 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:50:02
Pace8:24 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:30:2727:008:4227:00
8:42
-
10K
6.21 mi11:56:4553:188:3526:18
8:28
-0:14
15K
9.32 mi12:22:511:19:248:3226:06
8:25
-0:03
20K
12.43 mi12:49:061:45:398:3126:15
8:27
+0:02
HALF
13.11 mi12:54:481:51:218:305:42
8:22
-0:05
25K
15.53 mi13:15:102:11:438:2920:22
8:24
+0:02
30K
18.64 mi13:41:482:38:218:3026:38
8:35
+0:11
20M
20.00 mi13:53:062:49:398:2911:18
8:20
-0:15
21M
21.00 mi14:02:042:58:378:318:58
8:58
+0:38
35K
21.75 mi14:07:583:04:318:305:54
7:54
-1:04
23M
23.00 mi14:18:323:15:058:2910:34
8:27
+0:33
24M
24.00 mi14:26:433:23:168:298:11
8:11
-0:16
40K
24.85 mi14:33:573:30:308:297:14
8:28
+0:17
25.2M
25.20 mi14:36:563:33:298:292:59
8:40
+0:12
FINISH
26.22 mi14:44:503:41:238:277:54
7:46
-0:54

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

7:46 /mi

Average Pace

8:27 /mi

Slowest Pace

8:58 /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

2:35:48

70% of race

Time at Steady Pace

1:05:35

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:27 /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 mi11:30:2727:008:4227:00
8:42
#21129
10K
6.21 mi11:56:4553:188:3526:18
8:28
#20611
15K
9.32 mi12:22:511:19:248:3226:06
8:25
#20237
20K
12.43 mi12:49:061:45:398:3126:15
8:27
#19925
HALF
13.11 mi12:54:481:51:218:305:42
8:22
#19904
25K
15.53 mi13:15:102:11:438:2920:22
8:24
#19611
30K
18.64 mi13:41:482:38:218:3026:38
8:35
#19161
20M
20.00 mi13:53:062:49:398:2911:18
8:20
#18868
21M
21.00 mi14:02:042:58:378:318:58
8:58
#18683
35K
21.75 mi14:07:583:04:318:305:54
7:54
#18525
23M
23.00 mi14:18:323:15:058:2910:34
8:27
#18342
24M
24.00 mi14:26:433:23:168:298:11
8:11
#18202
40K
24.85 mi14:33:573:30:308:297:14
8:28
#18084
25.2M
25.20 mi14:36:563:33:298:292:59
8:40
#17988
FINISH
26.22 mi14:44:503:41:238:277:54
7:46
#17795
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi211298241824119567(Top 67%)7352(Top 58%)7352(Top 412%)
10K6.21 mi3.10 mi20611+5187944+2977944+29720165(Top 69%)7683(Top 61%)7683(Top 430%)
15K9.32 mi3.11 mi20237+3747733+2117733+21119567(Top 67%)7352(Top 58%)7352(Top 412%)
20K12.43 mi3.11 mi19925+3127587+1467587+14619004(Top 65%)7063(Top 56%)7063(Top 395%)
HALF13.11 mi0.68 mi19904+217575+127575+1219427(Top 67%)7264(Top 58%)7264(Top 407%)
25K15.53 mi2.42 mi19611+2937417+1587417+15817988(Top 62%)6553(Top 52%)6553(Top 367%)
30K18.64 mi3.11 mi19161+4507197+2207197+22017330(Top 60%)6304(Top 50%)6304(Top 353%)
20M20.00 mi1.36 mi18868+2937046+1517046+15115086(Top 52%)5116(Top 41%)5116(Top 286%)
21M21.00 mi1.00 mi18683+1856951+956951+9515989(Top 55%)5689(Top 45%)5689(Top 319%)
35K21.75 mi0.75 mi18525+1586876+756876+7513779(Top 47%)4531(Top 36%)4531(Top 254%)
23M23.00 mi1.25 mi18342+1836800+766800+7615382(Top 53%)5482(Top 44%)5482(Top 307%)
24M24.00 mi1.00 mi18202+1406745+556745+5515030(Top 52%)5359(Top 43%)5359(Top 300%)
40K24.85 mi0.85 mi18084+1186700+456700+4515461(Top 53%)5675(Top 45%)5675(Top 318%)
25.2M25.20 mi0.35 mi17988+966650+506650+5012725(Top 44%)4257(Top 34%)4257(Top 238%)
FINISH26.22 mi1.02 mi17795+1936570+806570+8013461(Top 46%)4655(Top 37%)4655(Top 261%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21
+97ft-345ft

Overall

19567

Females

7352

F45-49

7352

5K→10K

3.1 - 6.2 mi

Top 69%
×5
+79ft-138ft

Overall

20165

Females

7683

F45-49

7683

10K→15K

6.2 - 9.3 mi

Top 67%
×3
+67ft-78ft

Overall

19567

Females

7352

F45-49

7352

15K→20K

9.3 - 12.4 mi

Top 65%
×5
+106ft-86ft

Overall

19004

Females

7063

F45-49

7063

20K→HALF

12.4 - 13.1 mi

Top 67%
×2
+19ft-37ft

Overall

19427

Females

7264

F45-49

7264

HALF→25K

13.1 - 15.5 mi

Top 62%
×4
+66ft-88ft

Overall

17988

Females

6553

F45-49

6553

25K→30K

15.5 - 18.6 mi

Top 60%
×9
+181ft-148ft

Overall

17330

Females

6304

F45-49

6304

30K→20M

18.6 - 20.0 mi

Top 52%
×5
+64ft-50ft

Overall

15086

Females

5116

F45-49

5116

20M→21M

20.0 - 21.0 mi

Top 55%
×8
+106ft-24ft

Overall

15989

Females

5689

F45-49

5689

21M→35K

21.0 - 21.8 mi

Top 47%
×7
+17ft-86ft

Overall

13779

Females

4531

F45-49

4531

35K→23M

21.8 - 23.0 mi

Top 53%
×5
+23ft-63ft

Overall

15382

Females

5482

F45-49

5482

23M→24M

23.0 - 24.0 mi

Top 52%
×6
+12ft-82ft

Overall

15030

Females

5359

F45-49

5359

24M→40K

24.0 - 24.9 mi

Top 53%
×1
+6ft-20ft

Overall

15461

Females

5675

F45-49

5675

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1
+13ft-16ft

Overall

12725

Females

4257

F45-49

4257

25.2M→FINISH

25.2 - 26.2 mi

Top 46%
×2
+22ft-21ft

Overall

13461

Females

4655

F45-49

4655

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3669*
Passed By
335
Net Change
+3334
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21129
5K → 10K632*114+518#21129#20611
10K → 15K450*76+374#20611#20237
15K → 20K342*30+312#20237#19925
20K → HALF3918+21#19925#19904
HALF → 25K302*9+293#19904#19611
25K → 30K467*17+450#19611#19161
30K → 20M298*5+293#19161#18868
20M → 21M20015+185#18868#18683
21M → 35K1613+158#18683#18525
35K → 23M19916+183#18525#18342
23M → 24M1488+140#18342#18202
24M → 40K13517+118#18202#18084
40K → 25.2M971+96#18084#17988
25.2M → FINISH1996+193#17988#17795
TOTALS3669*335+3334

* 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