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BOSTON MARATHON 2026

Deirdre Claassen

Bib: 24562•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
Age Group (F55-59)
#0 / 951
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
27:23
3.11 mi
Rank: #21765
Start → 5K
27:23 | 8:49/mi
10K
54:42
6.21 mi
Rank: #21836 (-71)
5K → 10K
27:19 | 8:48/mi
15K
1:22:30
9.32 mi
Rank: #22009 (-173)
10K → 15K
27:48 | 8:57/mi
20K
1:50:31
12.43 mi
Rank: #21999 (+10)
15K → 20K
28:01 | 9:02/mi
HALF
1:56:29
13.11 mi
Rank: #21973 (+26)
20K → HALF
5:58 | 8:46/mi
25K
2:18:20
15.53 mi
Rank: #21819 (+154)
HALF → 25K
21:51 | 9:01/mi
30K
2:47:22
18.64 mi
Rank: #21673 (+146)
25K → 30K
29:02 | 9:21/mi
20M
2:59:59
20.00 mi
Rank: #21543 (+130)
30K → 20M
12:37 | 9:18/mi
21M
3:10:02
21.00 mi
Rank: #21498 (+45)
20M → 21M
10:03 | 10:03/mi
35K
3:16:45
21.75 mi
Rank: #21448 (+50)
21M → 35K
6:43 | 8:59/mi
23M
3:28:15
23.00 mi
Rank: #21332 (+116)
35K → 23M
11:30 | 9:12/mi
24M
3:37:10
24.00 mi
Rank: #21246 (+86)
23M → 24M
8:55 | 8:55/mi
40K
3:44:55
24.85 mi
Rank: #21157 (+89)
24M → 40K
7:45 | 9:04/mi
25.2M
3:48:15
25.20 mi
Rank: #21109 (+48)
40K → 25.2M
3:20 | 9:40/mi
FINISH
3:57:09
26.22 mi
Rank: #21048 (+61)
25.2M → FINISH
8:54 | 8:45/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:56:29
Pace8:54 /mi
2nd Half
Distance13.11 mi
Time2:00:40
Pace9:13 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:31:4927:238:4927:23
8:49
-
10K
6.21 mi11:59:0854:428:4927:19
8:48
-0:01
15K
9.32 mi12:26:561:22:308:5227:48
8:57
+0:09
20K
12.43 mi12:54:571:50:318:5428:01
9:02
+0:05
HALF
13.11 mi13:00:551:56:298:545:58
8:46
-0:16
25K
15.53 mi13:22:462:18:208:5521:51
9:01
+0:15
30K
18.64 mi13:51:482:47:228:5929:02
9:21
+0:20
20M
20.00 mi14:04:252:59:599:0012:37
9:18
-0:03
21M
21.00 mi14:14:283:10:029:0310:03
10:03
+0:45
35K
21.75 mi14:21:113:16:459:036:43
8:59
-1:04
23M
23.00 mi14:32:413:28:159:0411:30
9:12
+0:13
24M
24.00 mi14:41:363:37:109:038:55
8:55
-0:17
40K
24.85 mi14:49:213:44:559:037:45
9:04
+0:09
25.2M
25.20 mi14:52:413:48:159:043:20
9:40
+0:36
FINISH
26.22 mi15:01:353:57:099:048:54
8:45
-0:55

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

8:45 /mi

Average Pace

9:03 /mi

Slowest Pace

10:03 /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

3:43:46

94% of race

Time at Steady Pace

13:23

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:03 /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 mi11:31:4927:238:4927:23
8:49
#21765
10K
6.21 mi11:59:0854:428:4927:19
8:48
#21836
15K
9.32 mi12:26:561:22:308:5227:48
8:57
#22009
20K
12.43 mi12:54:571:50:318:5428:01
9:02
#21999
HALF
13.11 mi13:00:551:56:298:545:58
8:46
#21973
25K
15.53 mi13:22:462:18:208:5521:51
9:01
#21819
30K
18.64 mi13:51:482:47:228:5929:02
9:21
#21673
20M
20.00 mi14:04:252:59:599:0012:37
9:18
#21543
21M
21.00 mi14:14:283:10:029:0310:03
10:03
#21498
35K
21.75 mi14:21:113:16:459:036:43
8:59
#21448
23M
23.00 mi14:32:413:28:159:0411:30
9:12
#21332
24M
24.00 mi14:41:363:37:109:038:55
8:55
#21246
40K
24.85 mi14:49:213:44:559:037:45
9:04
#21157
25.2M
25.20 mi14:52:413:48:159:043:20
9:40
#21109
FINISH
26.22 mi15:01:353:57:099:048:54
8:45
#21048
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi217658564856422446(Top 77%)8845(Top 70%)8845(Top 930%)
10K6.21 mi3.10 mi21836-718583-198583-1921886(Top 75%)8594(Top 68%)8594(Top 904%)
15K9.32 mi3.11 mi22009-1738662-798662-7922446(Top 77%)8845(Top 70%)8845(Top 930%)
20K12.43 mi3.11 mi21999+108655+78655+721987(Top 76%)8650(Top 69%)8650(Top 910%)
HALF13.11 mi0.68 mi21973+268642+138642+1321612(Top 74%)8437(Top 67%)8437(Top 887%)
25K15.53 mi2.42 mi21819+1548569+738569+7321239(Top 73%)8288(Top 66%)8288(Top 872%)
30K18.64 mi3.11 mi21673+1468510+598510+5921123(Top 73%)8323(Top 66%)8323(Top 875%)
20M20.00 mi1.36 mi21543+1308470+408470+4020265(Top 70%)7955(Top 63%)7955(Top 836%)
21M21.00 mi1.00 mi21498+458458+128458+1220603(Top 71%)8167(Top 65%)8167(Top 859%)
35K21.75 mi0.75 mi21448+508435+238435+2319978(Top 69%)7935(Top 63%)7935(Top 834%)
23M23.00 mi1.25 mi21332+1168382+538382+5319401(Top 67%)7682(Top 61%)7682(Top 808%)
24M24.00 mi1.00 mi21246+868355+278355+2719121(Top 66%)7578(Top 60%)7578(Top 797%)
40K24.85 mi0.85 mi21157+898316+398316+3918735(Top 65%)7449(Top 59%)7449(Top 783%)
25.2M25.20 mi0.35 mi21109+488297+198297+1918158(Top 63%)7136(Top 57%)7136(Top 750%)
FINISH26.22 mi1.02 mi21048+618280+178280+1719363(Top 67%)7746(Top 62%)7746(Top 815%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21
+97ft-345ft

Overall

22446

Females

8845

F55-59

8845

5K→10K

3.1 - 6.2 mi

Top 75%
×5
+79ft-138ft

Overall

21886

Females

8594

F55-59

8594

10K→15K

6.2 - 9.3 mi

Top 77%
×3
+67ft-78ft

Overall

22446

Females

8845

F55-59

8845

15K→20K

9.3 - 12.4 mi

Top 76%
×5
+106ft-86ft

Overall

21987

Females

8650

F55-59

8650

20K→HALF

12.4 - 13.1 mi

Top 74%
×2
+19ft-37ft

Overall

21612

Females

8437

F55-59

8437

HALF→25K

13.1 - 15.5 mi

Top 73%
×4
+66ft-88ft

Overall

21239

Females

8288

F55-59

8288

25K→30K

15.5 - 18.6 mi

Top 73%
×9
+181ft-148ft

Overall

21123

Females

8323

F55-59

8323

30K→20M

18.6 - 20.0 mi

Top 70%
×5
+64ft-50ft

Overall

20265

Females

7955

F55-59

7955

20M→21M

20.0 - 21.0 mi

Top 71%
×8
+106ft-24ft

Overall

20603

Females

8167

F55-59

8167

21M→35K

21.0 - 21.8 mi

Top 69%
×7
+17ft-86ft

Overall

19978

Females

7935

F55-59

7935

35K→23M

21.8 - 23.0 mi

Top 67%
×5
+23ft-63ft

Overall

19401

Females

7682

F55-59

7682

23M→24M

23.0 - 24.0 mi

Top 66%
×6
+12ft-82ft

Overall

19121

Females

7578

F55-59

7578

24M→40K

24.0 - 24.9 mi

Top 65%
×1
+6ft-20ft

Overall

18735

Females

7449

F55-59

7449

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1
+13ft-16ft

Overall

18158

Females

7136

F55-59

7136

25.2M→FINISH

25.2 - 26.2 mi

Top 67%
×2
+22ft-21ft

Overall

19363

Females

7746

F55-59

7746

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1747*
Passed By
887
Net Change
+717
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21765
5K → 10K200200-71#21765#21836
10K → 15K99200-173#21836#22009
15K → 20K169159+10#22009#21999
20K → HALF4418+26#21999#21973
HALF → 25K202*48+154#21973#21819
25K → 30K236*90+146#21819#21673
30K → 20M15121+130#21673#21543
20M → 21M11065+45#21543#21498
21M → 35K599+50#21498#21448
35K → 23M13620+116#21448#21332
23M → 24M10923+86#21332#21246
24M → 40K956+89#21246#21157
40K → 25.2M557+48#21157#21109
25.2M → FINISH8221+61#21109#21048
TOTALS1747*887+717

* 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