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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Stephen Klepfer

Bib: 27840 •M •Age: N/A

MA

Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Age Group (M18-39)
#0 / 5723
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
30:38
3.11 mi
Rank: #25543
Start → 5K
30:38 | 9:52/mi
10K
1:01:45
6.21 mi
Rank: #25756 (-213)
5K → 10K
31:07 | 10:01/mi
15K
1:32:13
9.32 mi
Rank: #25564 (+192)
10K → 15K
30:28 | 9:49/mi
20K
2:02:08
12.43 mi
Rank: #25199 (+365)
15K → 20K
29:55 | 9:38/mi
HALF
2:08:16
13.11 mi
Rank: #25070 (+129)
20K → HALF
6:08 | 9:00/mi
25K
2:32:12
15.53 mi
Rank: #24902 (+168)
HALF → 25K
23:56 | 9:53/mi
30K
3:03:00
18.64 mi
Rank: #24540 (+362)
25K → 30K
30:48 | 9:55/mi
20M
3:16:44
20.00 mi
Rank: #24411 (+129)
30K → 20M
13:44 | 10:07/mi
21M
3:27:29
21.00 mi
Rank: #24288 (+123)
20M → 21M
10:45 | 10:45/mi
35K
3:35:12
21.75 mi
Rank: #24283 (+5)
21M → 35K
7:43 | 10:19/mi
23M
3:48:25
23.00 mi
Rank: #24221 (+62)
35K → 23M
13:13 | 10:34/mi
24M
4:00:02
24.00 mi
Rank: #24327 (-106)
23M → 24M
11:37 | 11:37/mi
40K
4:09:29
24.85 mi
Rank: #24318 (+9)
24M → 40K
9:27 | 11:04/mi
25.2M
4:13:28
25.20 mi
Rank: #24307 (+11)
40K → 25.2M
3:59 | 11:34/mi
FINISH
4:23:18
26.22 mi
Rank: #24245 (+62)
25.2M → FINISH
9:50 | 9:39/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time2:08:16
Pace9:48 /mi
2nd Half
Distance13.11 mi
Time2:15:02
Pace10:19 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:00:3930:389:5230:38
9:52
-
10K
6.21 mi12:31:461:01:459:5731:07
10:01
+0:09
15K
9.32 mi13:02:141:32:139:5430:28
9:49
-0:12
20K
12.43 mi13:32:092:02:089:5029:55
9:38
-0:11
HALF
13.11 mi13:38:172:08:169:486:08
9:00
-0:38
25K
15.53 mi14:02:132:32:129:4823:56
9:53
+0:53
30K
18.64 mi14:33:013:03:009:5030:48
9:55
+0:02
20M
20.00 mi14:46:453:16:449:5113:44
10:07
+0:12
21M
21.00 mi14:57:303:27:299:5310:45
10:45
+0:38
35K
21.75 mi15:05:133:35:129:547:43
10:19
-0:26
23M
23.00 mi15:18:263:48:259:5613:13
10:34
+0:15
24M
24.00 mi15:30:034:00:0210:0111:37
11:37
+1:03
40K
24.85 mi15:39:304:09:2910:039:27
11:04
-0:33
25.2M
25.20 mi15:43:294:13:2810:043:59
11:34
+0:30
FINISH
26.22 mi15:53:194:23:1810:039:50
9:39
-1:55

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

9:00 /mi

Average Pace

10:03 /mi

Slowest Pace

11:37 /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

45:53

17% of race

Time at Steady Pace

2:48:24

64% of race

Time at Slower Pace

49:01

19% of race

Average Pace: 10:03 /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 mi12:00:3930:389:5230:38
9:52
#25543
10K
6.21 mi12:31:461:01:459:5731:07
10:01
#25756
15K
9.32 mi13:02:141:32:139:5430:28
9:49
#25564
20K
12.43 mi13:32:092:02:089:5029:55
9:38
#25199
HALF
13.11 mi13:38:172:08:169:486:08
9:00
#25070
25K
15.53 mi14:02:132:32:129:4823:56
9:53
#24902
30K
18.64 mi14:33:013:03:009:5030:48
9:55
#24540
20M
20.00 mi14:46:453:16:449:5113:44
10:07
#24411
21M
21.00 mi14:57:303:27:299:5310:45
10:45
#24288
35K
21.75 mi15:05:133:35:129:547:43
10:19
#24283
23M
23.00 mi15:18:263:48:259:5613:13
10:34
#24221
24M
24.00 mi15:30:034:00:0210:0111:37
11:37
#24327
40K
24.85 mi15:39:304:09:2910:039:27
11:04
#24318
25.2M
25.20 mi15:43:294:13:2810:043:59
11:34
#24307
FINISH
26.22 mi15:53:194:23:1810:039:50
9:39
#24245
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25543149731497325228(Top 87%)14834(Top 91%)14834(Top 259%)
10K6.21 mi3.10 mi25756-21315063-9015063-9025871(Top 89%)15117(Top 93%)15117(Top 264%)
15K9.32 mi3.11 mi25564+19214978+8514978+8525228(Top 87%)14834(Top 91%)14834(Top 259%)
20K12.43 mi3.11 mi25199+36514805+17314805+17324113(Top 83%)14279(Top 87%)14279(Top 250%)
HALF13.11 mi0.68 mi25070+12914746+5914746+5922754(Top 78%)13632(Top 83%)13632(Top 238%)
25K15.53 mi2.42 mi24902+16814673+7314673+7323963(Top 83%)14175(Top 87%)14175(Top 248%)
30K18.64 mi3.11 mi24540+36214471+20214471+20222894(Top 79%)13572(Top 83%)13572(Top 237%)
20M20.00 mi1.36 mi24411+12914390+8114390+8122875(Top 79%)13485(Top 83%)13485(Top 236%)
21M21.00 mi1.00 mi24288+12314316+7414316+7422526(Top 78%)13280(Top 81%)13280(Top 232%)
35K21.75 mi0.75 mi24283+514305+1114305+1123910(Top 82%)13881(Top 85%)13881(Top 243%)
23M23.00 mi1.25 mi24221+6214251+5414251+5423524(Top 81%)13646(Top 84%)13646(Top 238%)
24M24.00 mi1.00 mi24327-10614280-2914280-2926099(Top 90%)14842(Top 91%)14842(Top 259%)
40K24.85 mi0.85 mi24318+914259+2114259+2124354(Top 84%)13954(Top 85%)13954(Top 244%)
25.2M25.20 mi0.35 mi24307+1114251+814251+823578(Top 81%)13580(Top 83%)13580(Top 237%)
FINISH26.22 mi1.02 mi24245+6214206+4514206+4522819(Top 79%)13230(Top 81%)13230(Top 231%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21
+97ft-345ft

Overall

25228

Males

14834

M18-39

14834

5K→10K

3.1 - 6.2 mi

Top 89%
×5
+79ft-138ft

Overall

25871

Males

15117

M18-39

15117

10K→15K

6.2 - 9.3 mi

Top 87%
×3
+67ft-78ft

Overall

25228

Males

14834

M18-39

14834

15K→20K

9.3 - 12.4 mi

Top 83%
×5
+106ft-86ft

Overall

24113

Males

14279

M18-39

14279

20K→HALF

12.4 - 13.1 mi

Top 78%
×2
+19ft-37ft

Overall

22754

Males

13632

M18-39

13632

HALF→25K

13.1 - 15.5 mi

Top 83%
×4
+66ft-88ft

Overall

23963

Males

14175

M18-39

14175

25K→30K

15.5 - 18.6 mi

Top 79%
×9
+181ft-148ft

Overall

22894

Males

13572

M18-39

13572

30K→20M

18.6 - 20.0 mi

Top 79%
×5
+64ft-50ft

Overall

22875

Males

13485

M18-39

13485

20M→21M

20.0 - 21.0 mi

Top 78%
×8
+106ft-24ft

Overall

22526

Males

13280

M18-39

13280

21M→35K

21.0 - 21.8 mi

Top 82%
×7
+17ft-86ft

Overall

23910

Males

13881

M18-39

13881

35K→23M

21.8 - 23.0 mi

Top 81%
×5
+23ft-63ft

Overall

23524

Males

13646

M18-39

13646

23M→24M

23.0 - 24.0 mi

Top 90%
×6
+12ft-82ft

Overall

26099

Males

14842

M18-39

14842

24M→40K

24.0 - 24.9 mi

Top 84%
×1
+6ft-20ft

Overall

24354

Males

13954

M18-39

13954

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1
+13ft-16ft

Overall

23578

Males

13580

M18-39

13580

25.2M→FINISH

25.2 - 26.2 mi

Top 79%
×2
+22ft-21ft

Overall

22819

Males

13230

M18-39

13230

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1989*
Passed By
558
Net Change
+1298
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25543
5K → 10K120200-213#25543#25756
10K → 15K235*43+192#25756#25564
15K → 20K373*8+365#25564#25199
20K → HALF1301+129#25199#25070
HALF → 25K18315+168#25070#24902
25K → 30K371*9+362#24902#24540
30K → 20M13910+129#24540#24411
20M → 21M1307+123#24411#24288
21M → 35K3429+5#24288#24283
35K → 23M10038+62#24283#24221
23M → 24M22128-106#24221#24327
24M → 40K5344+9#24327#24318
40K → 25.2M2110+11#24318#24307
25.2M → FINISH7816+62#24307#24245
TOTALS1989*558+1298

* 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

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OTQ

Olympic Trials Qualifying analysis available

Activity Data

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