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BOSTON MARATHON 2026

Sandra Chàvez

Bib: 20031•F

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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 44%
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
24:31
3.11 mi
Rank: #16147
Start → 5K
24:31 | 7:54/mi
10K
48:49
6.21 mi
Rank: #15966 (+181)
5K → 10K
24:18 | 7:50/mi
15K
1:13:13
9.32 mi
Rank: #15899 (+67)
10K → 15K
24:24 | 7:52/mi
20K
1:38:39
12.43 mi
Rank: #16341 (-442)
15K → 20K
25:26 | 8:12/mi
HALF
1:44:10
13.11 mi
Rank: #16416 (-75)
20K → HALF
5:31 | 8:06/mi
25K
2:04:28
15.53 mi
Rank: #16666 (-250)
HALF → 25K
20:18 | 8:23/mi
30K
2:31:50
18.64 mi
Rank: #17006 (-340)
25K → 30K
27:22 | 8:49/mi
20M
2:44:37
20.00 mi
Rank: #17359 (-353)
30K → 20M
12:47 | 9:25/mi
21M
2:54:46
21.00 mi
Rank: #17611 (-252)
20M → 21M
10:09 | 10:09/mi
35K
3:01:31
21.75 mi
Rank: #17700 (-89)
21M → 35K
6:45 | 9:02/mi
23M
3:13:00
23.00 mi
Rank: #17773 (-73)
35K → 23M
11:29 | 9:11/mi
24M
3:21:58
24.00 mi
Rank: #17862 (-89)
23M → 24M
8:58 | 8:58/mi
40K
3:30:00
24.85 mi
Rank: #17949 (-87)
24M → 40K
8:02 | 9:24/mi
25.2M
3:33:37
25.20 mi
Rank: #18023 (-74)
40K → 25.2M
3:37 | 10:30/mi
FINISH
3:43:09
26.22 mi
Rank: #18221 (-198)
25.2M → FINISH
9:32 | 9:22/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:44:10
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:58:59
Pace9:05 /mi
📊Positive Split: 14.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:09:2724:317:5424:31
7:54
-
10K
6.21 mi11:33:4548:497:5224:18
7:50
-0:04
15K
9.32 mi11:58:091:13:137:5224:24
7:52
+0:02
20K
12.43 mi12:23:351:38:397:5725:26
8:12
+0:20
HALF
13.11 mi12:29:061:44:107:575:31
8:06
-0:06
25K
15.53 mi12:49:242:04:288:0120:18
8:23
+0:17
30K
18.64 mi13:16:462:31:508:0927:22
8:49
+0:26
20M
20.00 mi13:29:332:44:378:1412:47
9:25
+0:36
21M
21.00 mi13:39:422:54:468:2010:09
10:09
+0:44
35K
21.75 mi13:46:273:01:318:216:45
9:02
-1:07
23M
23.00 mi13:57:563:13:008:2411:29
9:11
+0:09
24M
24.00 mi14:06:543:21:588:258:58
8:58
-0:13
40K
24.85 mi14:14:563:30:008:278:02
9:24
+0:26
25.2M
25.20 mi14:18:333:33:378:293:37
10:30
+1:06
FINISH
26.22 mi14:28:053:43:098:329:32
9:22
-1:08

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

7:50 /mi

Average Pace

8:31 /mi

Slowest Pace

10:30 /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

2:04:28

56% of race

Time at Steady Pace

54:34

24% of race

Time at Slower Pace

44:07

20% of race

Average Pace: 8:31 /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 mi11:09:2724:317:5424:31
7:54
#16147
10K
6.21 mi11:33:4548:497:5224:18
7:50
#15966
15K
9.32 mi11:58:091:13:137:5224:24
7:52
#15899
20K
12.43 mi12:23:351:38:397:5725:26
8:12
#16341
HALF
13.11 mi12:29:061:44:107:575:31
8:06
#16416
25K
15.53 mi12:49:242:04:288:0120:18
8:23
#16666
30K
18.64 mi13:16:462:31:508:0927:22
8:49
#17006
20M
20.00 mi13:29:332:44:378:1412:47
9:25
#17359
21M
21.00 mi13:39:422:54:468:2010:09
10:09
#17611
35K
21.75 mi13:46:273:01:318:216:45
9:02
#17700
23M
23.00 mi13:57:563:13:008:2411:29
9:11
#17773
24M
24.00 mi14:06:543:21:588:258:58
8:58
#17862
40K
24.85 mi14:14:563:30:008:278:02
9:24
#17949
25.2M
25.20 mi14:18:333:33:378:293:37
10:30
#18023
FINISH
26.22 mi14:28:053:43:098:329:32
9:22
#18221
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 mi161475413541315805(Top 54%)5231(Top 42%)5231(Top 293%)
10K6.21 mi3.10 mi15966+1815312+1015312+10115850(Top 55%)5223(Top 42%)5223(Top 292%)
15K9.32 mi3.11 mi15899+675271+415271+4115805(Top 54%)5231(Top 42%)5231(Top 293%)
20K12.43 mi3.11 mi16341-4425546-2755546-27517429(Top 60%)6180(Top 49%)6180(Top 346%)
HALF13.11 mi0.68 mi16416-755594-485594-4817791(Top 61%)6368(Top 51%)6368(Top 357%)
25K15.53 mi2.42 mi16666-2505747-1535747-15317828(Top 61%)6467(Top 51%)6467(Top 362%)
30K18.64 mi3.11 mi17006-3405968-2215968-22118624(Top 64%)7015(Top 56%)7015(Top 393%)
20M20.00 mi1.36 mi17359-3536176-2086176-20820734(Top 71%)8208(Top 65%)8208(Top 460%)
21M21.00 mi1.00 mi17611-2526346-1706346-17020922(Top 72%)8330(Top 66%)8330(Top 466%)
35K21.75 mi0.75 mi17700-896416-706416-7020125(Top 69%)7997(Top 64%)7997(Top 448%)
23M23.00 mi1.25 mi17773-736491-756491-7519338(Top 67%)7644(Top 61%)7644(Top 428%)
24M24.00 mi1.00 mi17862-896559-686559-6819317(Top 67%)7675(Top 61%)7675(Top 430%)
40K24.85 mi0.85 mi17949-876627-686627-6820022(Top 69%)8075(Top 64%)8075(Top 452%)
25.2M25.20 mi0.35 mi18023-746673-466673-4621023(Top 72%)8565(Top 68%)8565(Top 480%)
FINISH26.22 mi1.02 mi18221-1986791-1186791-11821863(Top 75%)8986(Top 71%)8986(Top 503%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21
+97ft-345ft

Overall

15805

Females

5231

F45-49

5231

5K→10K

3.1 - 6.2 mi

Top 55%
×5
+79ft-138ft

Overall

15850

Females

5223

F45-49

5223

10K→15K

6.2 - 9.3 mi

Top 54%
×3
+67ft-78ft

Overall

15805

Females

5231

F45-49

5231

15K→20K

9.3 - 12.4 mi

Top 60%
×5
+106ft-86ft

Overall

17429

Females

6180

F45-49

6180

20K→HALF

12.4 - 13.1 mi

Top 61%
×2
+19ft-37ft

Overall

17791

Females

6368

F45-49

6368

HALF→25K

13.1 - 15.5 mi

Top 61%
×4
+66ft-88ft

Overall

17828

Females

6467

F45-49

6467

25K→30K

15.5 - 18.6 mi

Top 64%
×9
+181ft-148ft

Overall

18624

Females

7015

F45-49

7015

30K→20M

18.6 - 20.0 mi

Top 71%
×5
+64ft-50ft

Overall

20734

Females

8208

F45-49

8208

20M→21M

20.0 - 21.0 mi

Top 72%
×8
+106ft-24ft

Overall

20922

Females

8330

F45-49

8330

21M→35K

21.0 - 21.8 mi

Top 69%
×7
+17ft-86ft

Overall

20125

Females

7997

F45-49

7997

35K→23M

21.8 - 23.0 mi

Top 67%
×5
+23ft-63ft

Overall

19338

Females

7644

F45-49

7644

23M→24M

23.0 - 24.0 mi

Top 67%
×6
+12ft-82ft

Overall

19317

Females

7675

F45-49

7675

24M→40K

24.0 - 24.9 mi

Top 69%
×1
+6ft-20ft

Overall

20022

Females

8075

F45-49

8075

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1
+13ft-16ft

Overall

21023

Females

8565

F45-49

8565

25.2M→FINISH

25.2 - 26.2 mi

Top 75%
×2
+22ft-21ft

Overall

21863

Females

8986

F45-49

8986

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1161*
Passed By
2270
Net Change
-2074
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16147
5K → 10K370*189+181#16147#15966
10K → 15K239*172+67#15966#15899
15K → 20K66200-442#15899#16341
20K → HALF1994-75#16341#16416
HALF → 25K80200-250#16416#16666
25K → 30K113200-340#16666#17006
30K → 20M22200-353#17006#17359
20M → 21M23200-252#17359#17611
21M → 35K41130-89#17611#17700
35K → 23M72145-73#17700#17773
23M → 24M37126-89#17773#17862
24M → 40K44131-87#17862#17949
40K → 25.2M983-74#17949#18023
25.2M → FINISH26200-198#18023#18221
TOTALS1161*2270-2074

* 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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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing