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BOSTON MARATHON 2026

Crystal Casper

Bib: 23130•F

IL

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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 48%
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
26:09
3.11 mi
Rank: #19620
Start → 5K
26:09 | 8:26/mi
10K
53:00
6.21 mi
Rank: #20334 (-714)
5K → 10K
26:51 | 8:39/mi
15K
1:18:39
9.32 mi
Rank: #19787 (+547)
10K → 15K
25:39 | 8:16/mi
20K
1:44:39
12.43 mi
Rank: #19470 (+317)
15K → 20K
26:00 | 8:23/mi
HALF
1:50:11
13.11 mi
Rank: #19405 (+65)
20K → HALF
5:32 | 8:08/mi
25K
2:10:59
15.53 mi
Rank: #19332 (+73)
HALF → 25K
20:48 | 8:35/mi
30K
2:38:13
18.64 mi
Rank: #19119 (+213)
25K → 30K
27:14 | 8:46/mi
20M
2:50:11
20.00 mi
Rank: #19039 (+80)
30K → 20M
11:58 | 8:49/mi
21M
3:00:53
21.00 mi
Rank: #19324 (-285)
20M → 21M
10:42 | 10:42/mi
35K
3:07:21
21.75 mi
Rank: #19281 (+43)
21M → 35K
6:28 | 8:39/mi
23M
3:18:02
23.00 mi
Rank: #19085 (+196)
35K → 23M
10:41 | 8:33/mi
24M
3:26:56
24.00 mi
Rank: #19089 (-4)
23M → 24M
8:54 | 8:54/mi
40K
3:34:25
24.85 mi
Rank: #19003 (+86)
24M → 40K
7:29 | 8:46/mi
25.2M
3:38:00
25.20 mi
Rank: #19045 (-42)
40K → 25.2M
3:35 | 10:24/mi
FINISH
3:46:33
26.22 mi
Rank: #18977 (+68)
25.2M → FINISH
8:33 | 8:24/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:50:11
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time1:56:22
Pace8:53 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:4326:098:2626:09
8:26
-
10K
6.21 mi11:55:3453:008:3226:51
8:39
+0:13
15K
9.32 mi12:21:131:18:398:2725:39
8:16
-0:23
20K
12.43 mi12:47:131:44:398:2626:00
8:23
+0:07
HALF
13.11 mi12:52:451:50:118:255:32
8:08
-0:15
25K
15.53 mi13:13:332:10:598:2620:48
8:35
+0:27
30K
18.64 mi13:40:472:38:138:3027:14
8:46
+0:11
20M
20.00 mi13:52:452:50:118:3111:58
8:49
+0:03
21M
21.00 mi14:03:273:00:538:3710:42
10:42
+1:53
35K
21.75 mi14:09:553:07:218:376:28
8:39
-2:03
23M
23.00 mi14:20:363:18:028:3710:41
8:33
-0:06
24M
24.00 mi14:29:303:26:568:388:54
8:54
+0:21
40K
24.85 mi14:36:593:34:258:387:29
8:46
-0:08
25.2M
25.20 mi14:40:343:38:008:403:35
10:24
+1:38
FINISH
26.22 mi14:49:073:46:338:398:33
8:24
-2:00

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

8:08 /mi

Average Pace

8:39 /mi

Slowest Pace

10:42 /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

31:11

14% of race

Time at Steady Pace

3:01:05

80% of race

Time at Slower Pace

14:17

6% of race

Average Pace: 8:38 /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 mi11:28:4326:098:2626:09
8:26
#19620
10K
6.21 mi11:55:3453:008:3226:51
8:39
#20334
15K
9.32 mi12:21:131:18:398:2725:39
8:16
#19787
20K
12.43 mi12:47:131:44:398:2626:00
8:23
#19470
HALF
13.11 mi12:52:451:50:118:255:32
8:08
#19405
25K
15.53 mi13:13:332:10:598:2620:48
8:35
#19332
30K
18.64 mi13:40:472:38:138:3027:14
8:46
#19119
20M
20.00 mi13:52:452:50:118:3111:58
8:49
#19039
21M
21.00 mi14:03:273:00:538:3710:42
10:42
#19324
35K
21.75 mi14:09:553:07:218:376:28
8:39
#19281
23M
23.00 mi14:20:363:18:028:3710:41
8:33
#19085
24M
24.00 mi14:29:303:26:568:388:54
8:54
#19089
40K
24.85 mi14:36:593:34:258:387:29
8:46
#19003
25.2M
25.20 mi14:40:343:38:008:403:35
10:24
#19045
FINISH
26.22 mi14:49:073:46:338:398:33
8:24
#18977
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 mi196207424742418724(Top 65%)6881(Top 55%)6881(Top 385%)
10K6.21 mi3.10 mi20334-7147791-3677791-36721126(Top 73%)8188(Top 65%)8188(Top 458%)
15K9.32 mi3.11 mi19787+5477494+2977494+29718724(Top 65%)6881(Top 55%)6881(Top 385%)
20K12.43 mi3.11 mi19470+3177325+1697325+16918538(Top 64%)6822(Top 54%)6822(Top 382%)
HALF13.11 mi0.68 mi19405+657288+377288+3717971(Top 62%)6461(Top 51%)6461(Top 362%)
25K15.53 mi2.42 mi19332+737255+337255+3319056(Top 66%)7154(Top 57%)7154(Top 401%)
30K18.64 mi3.11 mi19119+2137173+827173+8218397(Top 63%)6887(Top 55%)6887(Top 386%)
20M20.00 mi1.36 mi19039+807148+257148+2518048(Top 62%)6789(Top 54%)6789(Top 380%)
21M21.00 mi1.00 mi19324-2857312-1647312-16422429(Top 77%)9110(Top 72%)9110(Top 510%)
35K21.75 mi0.75 mi19281+437299+137299+1318385(Top 63%)7096(Top 56%)7096(Top 397%)
23M23.00 mi1.25 mi19085+1967215+847215+8415959(Top 55%)5831(Top 46%)5831(Top 326%)
24M24.00 mi1.00 mi19089-47244-297244-2919032(Top 66%)7534(Top 60%)7534(Top 422%)
40K24.85 mi0.85 mi19003+867209+357209+3517170(Top 59%)6612(Top 53%)6612(Top 370%)
25.2M25.20 mi0.35 mi19045-427248-397248-3920755(Top 72%)8433(Top 67%)8433(Top 472%)
FINISH26.22 mi1.02 mi18977+687216+327216+3217590(Top 61%)6834(Top 54%)6834(Top 383%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21
+97ft-345ft

Overall

18724

Females

6881

F45-49

6881

5K→10K

3.1 - 6.2 mi

Top 73%
×5
+79ft-138ft

Overall

21126

Females

8188

F45-49

8188

10K→15K

6.2 - 9.3 mi

Top 65%
×3
+67ft-78ft

Overall

18724

Females

6881

F45-49

6881

15K→20K

9.3 - 12.4 mi

Top 64%
×5
+106ft-86ft

Overall

18538

Females

6822

F45-49

6822

20K→HALF

12.4 - 13.1 mi

Top 62%
×2
+19ft-37ft

Overall

17971

Females

6461

F45-49

6461

HALF→25K

13.1 - 15.5 mi

Top 66%
×4
+66ft-88ft

Overall

19056

Females

7154

F45-49

7154

25K→30K

15.5 - 18.6 mi

Top 63%
×9
+181ft-148ft

Overall

18397

Females

6887

F45-49

6887

30K→20M

18.6 - 20.0 mi

Top 62%
×5
+64ft-50ft

Overall

18048

Females

6789

F45-49

6789

20M→21M

20.0 - 21.0 mi

Top 77%
×8
+106ft-24ft

Overall

22429

Females

9110

F45-49

9110

21M→35K

21.0 - 21.8 mi

Top 63%
×7
+17ft-86ft

Overall

18385

Females

7096

F45-49

7096

35K→23M

21.8 - 23.0 mi

Top 55%
×5
+23ft-63ft

Overall

15959

Females

5831

F45-49

5831

23M→24M

23.0 - 24.0 mi

Top 66%
×6
+12ft-82ft

Overall

19032

Females

7534

F45-49

7534

24M→40K

24.0 - 24.9 mi

Top 59%
×1
+6ft-20ft

Overall

17170

Females

6612

F45-49

6612

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1
+13ft-16ft

Overall

20755

Females

8433

F45-49

8433

25.2M→FINISH

25.2 - 26.2 mi

Top 61%
×2
+22ft-21ft

Overall

17590

Females

6834

F45-49

6834

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2253
Passed By
1610
Net Change
+643
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19620
5K → 10K67781-714#19620#20334
10K → 15K57326+547#20334#19787
15K → 20K34528+317#19787#19470
20K → HALF727+65#19470#19405
HALF → 25K15380+73#19405#19332
25K → 30K28572+213#19332#19119
30K → 20M14060+80#19119#19039
20M → 21M25310-285#19039#19324
21M → 35K8138+43#19324#19281
35K → 23M20610+196#19281#19085
23M → 24M7175-4#19085#19089
24M → 40K10923+86#19089#19003
40K → 25.2M2163-42#19003#19045
25.2M → FINISH10537+68#19045#18977
TOTALS22531610+643
📊

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