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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Jelger Groenland

Bib: 8864 •M •Age: N/A

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 21%
Gender (Male)
#0 / 16340
Top 33%
Masters (Masters Men)
#0 / 10617
Top 18%
Age Group (M45-49)
#0 / 2413
Top 26%
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
21:04
3.11 mi
Rank: #6676
Start → 5K
21:04 | 6:47/mi
10K
42:10
6.21 mi
Rank: #6736 (-60)
5K → 10K
21:06 | 6:48/mi
15K
1:03:33
9.32 mi
Rank: #7019 (-283)
10K → 15K
21:23 | 6:53/mi
20K
1:24:54
12.43 mi
Rank: #6946 (+73)
15K → 20K
21:21 | 6:53/mi
HALF
1:29:30
13.11 mi
Rank: #6939 (+7)
20K → HALF
4:36 | 6:45/mi
25K
1:46:10
15.53 mi
Rank: #6831 (+108)
HALF → 25K
16:40 | 6:53/mi
30K
2:07:59
18.64 mi
Rank: #6655 (+176)
25K → 30K
21:49 | 7:02/mi
20M
2:17:33
20.00 mi
Rank: #6564 (+91)
30K → 20M
9:34 | 7:03/mi
21M
2:24:51
21.00 mi
Rank: #6463 (+101)
20M → 21M
7:18 | 7:18/mi
35K
2:29:52
21.75 mi
Rank: #6385 (+78)
21M → 35K
5:01 | 6:43/mi
23M
2:38:27
23.00 mi
Rank: #6247 (+138)
35K → 23M
8:35 | 6:52/mi
24M
2:45:05
24.00 mi
Rank: #6123 (+124)
23M → 24M
6:38 | 6:38/mi
40K
2:50:57
24.85 mi
Rank: #6021 (+102)
24M → 40K
5:52 | 6:52/mi
25.2M
2:53:38
25.20 mi
Rank: #6033 (-12)
40K → 25.2M
2:41 | 7:47/mi
FINISH
3:00:45
26.22 mi
Rank: #6054 (-21)
25.2M → FINISH
7:07 | 7:00/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
Time1:29:30
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:31:15
Pace6:58 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:36:5821:046:4721:04
6:47
-
10K
6.21 mi10:58:0442:106:4821:06
6:48
+0:01
15K
9.32 mi11:19:271:03:336:5021:23
6:53
+0:05
20K
12.43 mi11:40:481:24:546:5021:21
6:53
0:00
HALF
13.11 mi11:45:241:29:306:504:36
6:45
-0:08
25K
15.53 mi12:02:041:46:106:5116:40
6:53
+0:08
30K
18.64 mi12:23:532:07:596:5221:49
7:02
+0:09
20M
20.00 mi12:33:272:17:336:539:34
7:03
+0:01
21M
21.00 mi12:40:452:24:516:547:18
7:18
+0:15
35K
21.75 mi12:45:462:29:526:545:01
6:43
-0:35
23M
23.00 mi12:54:212:38:276:548:35
6:52
+0:09
24M
24.00 mi13:00:592:45:056:536:38
6:38
-0:14
40K
24.85 mi13:06:512:50:576:535:52
6:52
+0:14
25.2M
25.20 mi13:09:322:53:386:542:41
7:47
+0:55
FINISH
26.22 mi13:16:393:00:456:547:07
7:00
-0:47

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

6:38 /mi

Average Pace

6:54 /mi

Slowest Pace

7:47 /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

2:50:46

94% of race

Time at Steady Pace

9:59

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:54 /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 mi10:36:5821:046:4721:04
6:47
#6676
10K
6.21 mi10:58:0442:106:4821:06
6:48
#6736
15K
9.32 mi11:19:271:03:336:5021:23
6:53
#7019
20K
12.43 mi11:40:481:24:546:5021:21
6:53
#6946
HALF
13.11 mi11:45:241:29:306:504:36
6:45
#6939
25K
15.53 mi12:02:041:46:106:5116:40
6:53
#6831
30K
18.64 mi12:23:532:07:596:5221:49
7:02
#6655
20M
20.00 mi12:33:272:17:336:539:34
7:03
#6564
21M
21.00 mi12:40:452:24:516:547:18
7:18
#6463
35K
21.75 mi12:45:462:29:526:545:01
6:43
#6385
23M
23.00 mi12:54:212:38:276:548:35
6:52
#6247
24M
24.00 mi13:00:592:45:056:536:38
6:38
#6123
40K
24.85 mi13:06:512:50:576:535:52
6:52
#6021
25.2M
25.20 mi13:09:322:53:386:542:41
7:47
#6033
FINISH
26.22 mi13:16:393:00:456:547:07
7:00
#6054
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6676598059807613(Top 26%)6604(Top 40%)6604(Top 274%)
10K6.21 mi3.10 mi6736-606023-436023-436889(Top 24%)6119(Top 37%)6119(Top 254%)
15K9.32 mi3.11 mi7019-2836211-1886211-1887613(Top 26%)6604(Top 40%)6604(Top 274%)
20K12.43 mi3.11 mi6946+736146+656146+656832(Top 24%)6026(Top 37%)6026(Top 250%)
HALF13.11 mi0.68 mi6939+76140+66140+66578(Top 23%)5858(Top 36%)5858(Top 243%)
25K15.53 mi2.42 mi6831+1086062+786062+786425(Top 22%)5683(Top 35%)5683(Top 236%)
30K18.64 mi3.11 mi6655+1765914+1485914+1486081(Top 21%)5365(Top 33%)5365(Top 222%)
20M20.00 mi1.36 mi6564+915831+835831+835857(Top 20%)5139(Top 31%)5139(Top 213%)
21M21.00 mi1.00 mi6463+1015747+845747+845273(Top 18%)4616(Top 28%)4616(Top 191%)
35K21.75 mi0.75 mi6385+785678+695678+695018(Top 17%)4445(Top 27%)4445(Top 184%)
23M23.00 mi1.25 mi6247+1385570+1085570+1084494(Top 15%)4000(Top 24%)4000(Top 166%)
24M24.00 mi1.00 mi6123+1245463+1075463+1073984(Top 14%)3568(Top 22%)3568(Top 148%)
40K24.85 mi0.85 mi6021+1025375+885375+884608(Top 16%)4003(Top 24%)4003(Top 166%)
25.2M25.20 mi0.35 mi6033-125381-65381-66866(Top 24%)5457(Top 33%)5457(Top 226%)
FINISH26.22 mi1.02 mi6054-215387-65387-67398(Top 25%)5713(Top 35%)5713(Top 237%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21
+97ft-345ft

Overall

7613

Males

6604

M45-49

6604

5K→10K

3.1 - 6.2 mi

Top 24%
×5
+79ft-138ft

Overall

6889

Males

6119

M45-49

6119

10K→15K

6.2 - 9.3 mi

Top 26%
×3
+67ft-78ft

Overall

7613

Males

6604

M45-49

6604

15K→20K

9.3 - 12.4 mi

Top 24%
×5
+106ft-86ft

Overall

6832

Males

6026

M45-49

6026

20K→HALF

12.4 - 13.1 mi

Top 23%
×2
+19ft-37ft

Overall

6578

Males

5858

M45-49

5858

HALF→25K

13.1 - 15.5 mi

Top 22%
×4
+66ft-88ft

Overall

6425

Males

5683

M45-49

5683

25K→30K

15.5 - 18.6 mi

Top 21%
×9
+181ft-148ft

Overall

6081

Males

5365

M45-49

5365

30K→20M

18.6 - 20.0 mi

Top 20%
×5
+64ft-50ft

Overall

5857

Males

5139

M45-49

5139

20M→21M

20.0 - 21.0 mi

Top 18%
×8
+106ft-24ft

Overall

5273

Males

4616

M45-49

4616

21M→35K

21.0 - 21.8 mi

Top 17%
×7
+17ft-86ft

Overall

5018

Males

4445

M45-49

4445

35K→23M

21.8 - 23.0 mi

Top 15%
×5
+23ft-63ft

Overall

4494

Males

4000

M45-49

4000

23M→24M

23.0 - 24.0 mi

Top 14%
×6
+12ft-82ft

Overall

3984

Males

3568

M45-49

3568

24M→40K

24.0 - 24.9 mi

Top 16%
×1
+6ft-20ft

Overall

4608

Males

4003

M45-49

4003

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1
+13ft-16ft

Overall

6866

Males

5457

M45-49

5457

25.2M→FINISH

25.2 - 26.2 mi

Top 25%
×2
+22ft-21ft

Overall

7398

Males

5713

M45-49

5713

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1643*
Passed By
857
Net Change
+622
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6676
5K → 10K169200-60#6676#6736
10K → 15K52200-283#6736#7019
15K → 20K190117+73#7019#6946
20K → HALF3427+7#6946#6939
HALF → 25K15850+108#6939#6831
25K → 30K232*56+176#6831#6655
30K → 20M12029+91#6655#6564
20M → 21M12019+101#6564#6463
21M → 35K846+78#6463#6385
35K → 23M15214+138#6385#6247
23M → 24M1328+124#6247#6123
24M → 40K12523+102#6123#6021
40K → 25.2M2032-12#6021#6033
25.2M → FINISH5576-21#6033#6054
TOTALS1643*857+622

* 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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