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BOSTON MARATHON 2026

Sandra Leon

Bib: 20893•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 38%
Masters (Masters Women)
#0 / 6862
Top 23%
Age Group (F40-44)
#0 / 1737
Top 47%
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
23:25
3.11 mi
Rank: #13110
Start → 5K
23:25 | 7:33/mi
10K
47:08
6.21 mi
Rank: #13598 (-488)
5K → 10K
23:43 | 7:39/mi
15K
1:11:00
9.32 mi
Rank: #13823 (-225)
10K → 15K
23:52 | 7:41/mi
20K
1:35:00
12.43 mi
Rank: #13811 (+12)
15K → 20K
24:00 | 7:44/mi
HALF
1:40:11
13.11 mi
Rank: #13805 (+6)
20K → HALF
5:11 | 7:37/mi
25K
1:59:01
15.53 mi
Rank: #13746 (+59)
HALF → 25K
18:50 | 7:46/mi
30K
2:24:26
18.64 mi
Rank: #13918 (-172)
25K → 30K
25:25 | 8:11/mi
20M
2:35:56
20.00 mi
Rank: #14082 (-164)
30K → 20M
11:30 | 8:28/mi
21M
2:45:17
21.00 mi
Rank: #14310 (-228)
20M → 21M
9:21 | 9:21/mi
35K
2:50:59
21.75 mi
Rank: #14209 (+101)
21M → 35K
5:42 | 7:38/mi
23M
3:02:43
23.00 mi
Rank: #14680 (-471)
35K → 23M
11:44 | 9:23/mi
24M
3:10:22
24.00 mi
Rank: #14503 (+177)
23M → 24M
7:39 | 7:39/mi
40K
3:18:08
24.85 mi
Rank: #14729 (-226)
24M → 40K
7:46 | 9:06/mi
25.2M
3:21:22
25.20 mi
Rank: #14761 (-32)
40K → 25.2M
3:14 | 9:23/mi
FINISH
3:29:27
26.22 mi
Rank: #14765 (-4)
25.2M → FINISH
8:05 | 7:56/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:40:11
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:49:16
Pace8:21 /mi
📊Positive Split: 9.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:08:1223:257:3323:25
7:33
-
10K
6.21 mi11:31:5547:087:3623:43
7:39
+0:06
15K
9.32 mi11:55:471:11:007:3823:52
7:41
+0:02
20K
12.43 mi12:19:471:35:007:3924:00
7:44
+0:03
HALF
13.11 mi12:24:581:40:117:395:11
7:37
-0:07
25K
15.53 mi12:43:481:59:017:4018:50
7:46
+0:09
30K
18.64 mi13:09:132:24:267:4525:25
8:11
+0:25
20M
20.00 mi13:20:432:35:567:4811:30
8:28
+0:17
21M
21.00 mi13:30:042:45:177:539:21
9:21
+0:53
35K
21.75 mi13:35:462:50:597:525:42
7:38
-1:43
23M
23.00 mi13:47:303:02:437:5711:44
9:23
+1:45
24M
24.00 mi13:55:093:10:227:567:39
7:39
-1:44
40K
24.85 mi14:02:553:18:087:597:46
9:06
+1:27
25.2M
25.20 mi14:06:093:21:228:003:14
9:23
+0:17
FINISH
26.22 mi14:14:143:29:278:008:05
7:56
-1:27

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

7:33 /mi

Average Pace

8:00 /mi

Slowest Pace

9:23 /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

0:00

0% of race

Time at Steady Pace

2:20:27

67% of race

Time at Slower Pace

1:09:00

33% of race

Average Pace: 7:59 /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 mi11:08:1223:257:3323:25
7:33
#13110
10K
6.21 mi11:31:5547:087:3623:43
7:39
#13598
15K
9.32 mi11:55:471:11:007:3823:52
7:41
#13823
20K
12.43 mi12:19:471:35:007:3924:00
7:44
#13811
HALF
13.11 mi12:24:581:40:117:395:11
7:37
#13805
25K
15.53 mi12:43:481:59:017:4018:50
7:46
#13746
30K
18.64 mi13:09:132:24:267:4525:25
8:11
#13918
20M
20.00 mi13:20:432:35:567:4811:30
8:28
#14082
21M
21.00 mi13:30:042:45:177:539:21
9:21
#14310
35K
21.75 mi13:35:462:50:597:525:42
7:38
#14209
23M
23.00 mi13:47:303:02:437:5711:44
9:23
#14680
24M
24.00 mi13:55:093:10:227:567:39
7:39
#14503
40K
24.85 mi14:02:553:18:087:597:46
9:06
#14729
25.2M
25.20 mi14:06:093:21:228:003:14
9:23
#14761
FINISH
26.22 mi14:14:143:29:278:008:05
7:56
#14765
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi131103556355614397(Top 50%)4382(Top 35%)4382(Top 252%)
10K6.21 mi3.10 mi13598-4883866-3103866-31014188(Top 49%)4233(Top 34%)4233(Top 244%)
15K9.32 mi3.11 mi13823-2254017-1514017-15114397(Top 50%)4382(Top 35%)4382(Top 252%)
20K12.43 mi3.11 mi13811+124036-194036-1913938(Top 48%)4189(Top 33%)4189(Top 241%)
HALF13.11 mi0.68 mi13805+64033+34033+314004(Top 48%)4166(Top 33%)4166(Top 240%)
25K15.53 mi2.42 mi13746+594020+134020+1313577(Top 47%)4064(Top 32%)4064(Top 234%)
30K18.64 mi3.11 mi13918-1724147-1274147-12714810(Top 51%)4861(Top 39%)4861(Top 280%)
20M20.00 mi1.36 mi14082-1644280-1334280-13316014(Top 55%)5645(Top 45%)5645(Top 325%)
21M21.00 mi1.00 mi14310-2284425-1454425-14517857(Top 62%)6707(Top 53%)6707(Top 386%)
35K21.75 mi0.75 mi14209+1014391+344391+3411810(Top 41%)3454(Top 27%)3454(Top 199%)
23M23.00 mi1.25 mi14680-4714709-3184709-31820150(Top 69%)8040(Top 64%)8040(Top 463%)
24M24.00 mi1.00 mi14503+1774629+804629+8011258(Top 39%)3322(Top 26%)3322(Top 191%)
40K24.85 mi0.85 mi14729-2264777-1484777-14818795(Top 65%)7462(Top 59%)7462(Top 430%)
25.2M25.20 mi0.35 mi14761-324808-314808-3116743(Top 58%)6349(Top 50%)6349(Top 366%)
FINISH26.22 mi1.02 mi14765-44829-214829-2114749(Top 51%)5302(Top 42%)5302(Top 305%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21
+97ft-345ft

Overall

14397

Females

4382

F40-44

4382

5K→10K

3.1 - 6.2 mi

Top 49%
×5
+79ft-138ft

Overall

14188

Females

4233

F40-44

4233

10K→15K

6.2 - 9.3 mi

Top 50%
×3
+67ft-78ft

Overall

14397

Females

4382

F40-44

4382

15K→20K

9.3 - 12.4 mi

Top 48%
×5
+106ft-86ft

Overall

13938

Females

4189

F40-44

4189

20K→HALF

12.4 - 13.1 mi

Top 48%
×2
+19ft-37ft

Overall

14004

Females

4166

F40-44

4166

HALF→25K

13.1 - 15.5 mi

Top 47%
×4
+66ft-88ft

Overall

13577

Females

4064

F40-44

4064

25K→30K

15.5 - 18.6 mi

Top 51%
×9
+181ft-148ft

Overall

14810

Females

4861

F40-44

4861

30K→20M

18.6 - 20.0 mi

Top 55%
×5
+64ft-50ft

Overall

16014

Females

5645

F40-44

5645

20M→21M

20.0 - 21.0 mi

Top 62%
×8
+106ft-24ft

Overall

17857

Females

6707

F40-44

6707

21M→35K

21.0 - 21.8 mi

Top 41%
×7
+17ft-86ft

Overall

11810

Females

3454

F40-44

3454

35K→23M

21.8 - 23.0 mi

Top 69%
×5
+23ft-63ft

Overall

20150

Females

8040

F40-44

8040

23M→24M

23.0 - 24.0 mi

Top 39%
×6
+12ft-82ft

Overall

11258

Females

3322

F40-44

3322

24M→40K

24.0 - 24.9 mi

Top 65%
×1
+6ft-20ft

Overall

18795

Females

7462

F40-44

7462

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1
+13ft-16ft

Overall

16743

Females

6349

F40-44

6349

25.2M→FINISH

25.2 - 26.2 mi

Top 51%
×2
+22ft-21ft

Overall

14749

Females

5302

F40-44

5302

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1288
Passed By
1825
Net Change
-1655
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13110
5K → 10K117200-488#13110#13598
10K → 15K128200-225#13598#13823
15K → 20K169157+12#13823#13811
20K → HALF3731+6#13811#13805
HALF → 25K15293+59#13805#13746
25K → 30K135200-172#13746#13918
30K → 20M63200-164#13918#14082
20M → 21M49200-228#14082#14310
21M → 35K11211+101#14310#14209
35K → 23M32200-471#14209#14680
23M → 24M1825+177#14680#14503
24M → 40K20200-226#14503#14729
40K → 25.2M2052-32#14729#14761
25.2M → FINISH7276-4#14761#14765
TOTALS12881825-1655
📊

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