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BOSTON MARATHON 2026

Ron Claassen

Bib: 24938•M

AB

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M65-69)
#0 / 774
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
27:51
3.11 mi
Rank: #22481
Start → 5K
27:51 | 8:58/mi
10K
55:17
6.21 mi
Rank: #22274 (+207)
5K → 10K
27:26 | 8:50/mi
15K
1:23:08
9.32 mi
Rank: #22352 (-78)
10K → 15K
27:51 | 8:58/mi
20K
1:52:33
12.43 mi
Rank: #22732 (-380)
15K → 20K
29:25 | 9:29/mi
HALF
1:58:44
13.11 mi
Rank: #22763 (-31)
20K → HALF
6:11 | 9:05/mi
25K
2:21:29
15.53 mi
Rank: #22744 (+19)
HALF → 25K
22:45 | 9:23/mi
30K
2:52:38
18.64 mi
Rank: #22853 (-109)
25K → 30K
31:09 | 10:02/mi
20M
3:06:13
20.00 mi
Rank: #22822 (+31)
30K → 20M
13:35 | 10:01/mi
21M
3:17:34
21.00 mi
Rank: #22865 (-43)
20M → 21M
11:21 | 11:21/mi
35K
3:24:55
21.75 mi
Rank: #22869 (-4)
21M → 35K
7:21 | 9:50/mi
23M
3:38:00
23.00 mi
Rank: #22899 (-30)
35K → 23M
13:05 | 10:28/mi
24M
3:47:40
24.00 mi
Rank: #22842 (+57)
23M → 24M
9:40 | 9:40/mi
40K
3:55:41
24.85 mi
Rank: #22729 (+113)
24M → 40K
8:01 | 9:23/mi
25.2M
3:59:18
25.20 mi
Rank: #22701 (+28)
40K → 25.2M
3:37 | 10:30/mi
FINISH
4:08:36
26.22 mi
Rank: #22643 (+58)
25.2M → FINISH
9:18 | 9:08/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:58:44
Pace9:04 /mi
2nd Half
Distance13.11 mi
Time2:09:52
Pace9:55 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:33:1927:518:5827:51
8:58
-
10K
6.21 mi12:00:4555:178:5427:26
8:50
-0:08
15K
9.32 mi12:28:361:23:088:5627:51
8:58
+0:08
20K
12.43 mi12:58:011:52:339:0429:25
9:29
+0:31
HALF
13.11 mi13:04:121:58:449:046:11
9:05
-0:24
25K
15.53 mi13:26:572:21:299:0722:45
9:23
+0:18
30K
18.64 mi13:58:062:52:389:1631:09
10:02
+0:39
20M
20.00 mi14:11:413:06:139:1913:35
10:01
-0:01
21M
21.00 mi14:23:023:17:349:2511:21
11:21
+1:20
35K
21.75 mi14:30:233:24:559:267:21
9:50
-1:31
23M
23.00 mi14:43:283:38:009:2913:05
10:28
+0:38
24M
24.00 mi14:53:083:47:409:309:40
9:40
-0:48
40K
24.85 mi15:01:093:55:419:298:01
9:23
-0:17
25.2M
25.20 mi15:04:463:59:189:303:37
10:30
+1:07
FINISH
26.22 mi15:14:044:08:369:309:18
9:08
-1:22

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

8:50 /mi

Average Pace

9:29 /mi

Slowest Pace

11:21 /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

1:38:37

40% of race

Time at Steady Pace

1:09:51

28% of race

Time at Slower Pace

1:20:08

32% of race

Average Pace: 9:29 /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 mi11:33:1927:518:5827:51
8:58
#22481
10K
6.21 mi12:00:4555:178:5427:26
8:50
#22274
15K
9.32 mi12:28:361:23:088:5627:51
8:58
#22352
20K
12.43 mi12:58:011:52:339:0429:25
9:29
#22732
HALF
13.11 mi13:04:121:58:449:046:11
9:05
#22763
25K
15.53 mi13:26:572:21:299:0722:45
9:23
#22744
30K
18.64 mi13:58:062:52:389:1631:09
10:02
#22853
20M
20.00 mi14:11:413:06:139:1913:35
10:01
#22822
21M
21.00 mi14:23:023:17:349:2511:21
11:21
#22865
35K
21.75 mi14:30:233:24:559:267:21
9:50
#22869
23M
23.00 mi14:43:283:38:009:2913:05
10:28
#22899
24M
24.00 mi14:53:083:47:409:309:40
9:40
#22842
40K
24.85 mi15:01:093:55:419:298:01
9:23
#22729
25.2M
25.20 mi15:04:463:59:189:303:37
10:30
#22701
FINISH
26.22 mi15:14:044:08:369:309:18
9:08
#22643
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi22481134681346822524(Top 78%)13543(Top 83%)13543(Top 1750%)
10K6.21 mi3.10 mi22274+20713381+8713381+8722043(Top 76%)13277(Top 81%)13277(Top 1715%)
15K9.32 mi3.11 mi22352-7813422-4113422-4122524(Top 78%)13543(Top 83%)13543(Top 1750%)
20K12.43 mi3.11 mi22732-38013625-20313625-20323661(Top 82%)14041(Top 86%)14041(Top 1814%)
HALF13.11 mi0.68 mi22763-3113642-1713642-1723019(Top 79%)13749(Top 84%)13749(Top 1776%)
25K15.53 mi2.42 mi22744+1913610+3213610+3222653(Top 78%)13548(Top 83%)13548(Top 1750%)
30K18.64 mi3.11 mi22853-10913633-2313633-2323202(Top 80%)13716(Top 84%)13716(Top 1772%)
20M20.00 mi1.36 mi22822+3113600+3313600+3322567(Top 78%)13335(Top 82%)13335(Top 1723%)
21M21.00 mi1.00 mi22865-4313604-413604-423845(Top 82%)13871(Top 85%)13871(Top 1792%)
35K21.75 mi0.75 mi22869-413598+613598+622682(Top 78%)13295(Top 81%)13295(Top 1718%)
23M23.00 mi1.25 mi22899-3013591+713591+723272(Top 80%)13528(Top 83%)13528(Top 1748%)
24M24.00 mi1.00 mi22842+5713550+4113550+4121871(Top 75%)12819(Top 78%)12819(Top 1656%)
40K24.85 mi0.85 mi22729+11313479+7113479+7119930(Top 69%)11820(Top 72%)11820(Top 1527%)
25.2M25.20 mi0.35 mi22701+2813463+1613463+1620997(Top 72%)12361(Top 76%)12361(Top 1597%)
FINISH26.22 mi1.02 mi22643+5813424+3913424+3921025(Top 72%)12364(Top 76%)12364(Top 1597%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21
+97ft-345ft

Overall

22524

Males

13543

M65-69

13543

5K→10K

3.1 - 6.2 mi

Top 76%
×5
+79ft-138ft

Overall

22043

Males

13277

M65-69

13277

10K→15K

6.2 - 9.3 mi

Top 78%
×3
+67ft-78ft

Overall

22524

Males

13543

M65-69

13543

15K→20K

9.3 - 12.4 mi

Top 82%
×5
+106ft-86ft

Overall

23661

Males

14041

M65-69

14041

20K→HALF

12.4 - 13.1 mi

Top 79%
×2
+19ft-37ft

Overall

23019

Males

13749

M65-69

13749

HALF→25K

13.1 - 15.5 mi

Top 78%
×4
+66ft-88ft

Overall

22653

Males

13548

M65-69

13548

25K→30K

15.5 - 18.6 mi

Top 80%
×9
+181ft-148ft

Overall

23202

Males

13716

M65-69

13716

30K→20M

18.6 - 20.0 mi

Top 78%
×5
+64ft-50ft

Overall

22567

Males

13335

M65-69

13335

20M→21M

20.0 - 21.0 mi

Top 82%
×8
+106ft-24ft

Overall

23845

Males

13871

M65-69

13871

21M→35K

21.0 - 21.8 mi

Top 78%
×7
+17ft-86ft

Overall

22682

Males

13295

M65-69

13295

35K→23M

21.8 - 23.0 mi

Top 80%
×5
+23ft-63ft

Overall

23272

Males

13528

M65-69

13528

23M→24M

23.0 - 24.0 mi

Top 75%
×6
+12ft-82ft

Overall

21871

Males

12819

M65-69

12819

24M→40K

24.0 - 24.9 mi

Top 69%
×1
+6ft-20ft

Overall

19930

Males

11820

M65-69

11820

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1
+13ft-16ft

Overall

20997

Males

12361

M65-69

12361

25.2M→FINISH

25.2 - 26.2 mi

Top 72%
×2
+22ft-21ft

Overall

21025

Males

12364

M65-69

12364

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1430
Passed By
1592
Net Change
-162
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22481
5K → 10K373166+207#22481#22274
10K → 15K140218-78#22274#22352
15K → 20K75455-380#22352#22732
20K → HALF1849-31#22732#22763
HALF → 25K134115+19#22763#22744
25K → 30K146255-109#22744#22853
30K → 20M8554+31#22853#22822
20M → 21M63106-43#22822#22865
21M → 35K3943-4#22865#22869
35K → 23M5484-30#22869#22899
23M → 24M7720+57#22899#22842
24M → 40K1196+113#22842#22729
40K → 25.2M379+28#22729#22701
25.2M → FINISH7012+58#22701#22643
TOTALS14301592-162
📊

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