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BOSTON MARATHON 2026

Chatchalerm Niponcharoensri

Bib: 29827•M

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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 (M45-49)
#0 / 2413
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
27:16
3.11 mi
Rank: #21568
Start → 5K
27:16 | 8:47/mi
10K
52:48
6.21 mi
Rank: #20155 (+1413)
5K → 10K
25:32 | 8:14/mi
15K
1:17:55
9.32 mi
Rank: #19345 (+810)
10K → 15K
25:07 | 8:06/mi
20K
1:43:41
12.43 mi
Rank: #19029 (+316)
15K → 20K
25:46 | 8:18/mi
HALF
1:49:10
13.11 mi
Rank: #18940 (+89)
20K → HALF
5:29 | 8:03/mi
25K
2:09:51
15.53 mi
Rank: #18893 (+47)
HALF → 25K
20:41 | 8:32/mi
30K
2:38:14
18.64 mi
Rank: #19122 (-229)
25K → 30K
28:23 | 9:09/mi
20M
2:50:17
20.00 mi
Rank: #19077 (+45)
30K → 20M
12:03 | 8:53/mi
21M
2:59:58
21.00 mi
Rank: #19081 (-4)
20M → 21M
9:41 | 9:41/mi
35K
3:06:14
21.75 mi
Rank: #18986 (+95)
21M → 35K
6:16 | 8:23/mi
23M
3:17:25
23.00 mi
Rank: #18918 (+68)
35K → 23M
11:11 | 8:57/mi
24M
3:25:54
24.00 mi
Rank: #18824 (+94)
23M → 24M
8:29 | 8:29/mi
40K
3:33:50
24.85 mi
Rank: #18853 (-29)
24M → 40K
7:56 | 9:17/mi
25.2M
3:37:02
25.20 mi
Rank: #18806 (+47)
40K → 25.2M
3:12 | 9:17/mi
FINISH
3:45:45
26.22 mi
Rank: #18795 (+11)
25.2M → FINISH
8:43 | 8:34/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:49:10
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time1:56:35
Pace8:54 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:3427:168:4727:16
8:47
-
10K
6.21 mi12:17:0652:488:3025:32
8:14
-0:33
15K
9.32 mi12:42:131:17:558:2225:07
8:06
-0:08
20K
12.43 mi13:07:591:43:418:2125:46
8:18
+0:12
HALF
13.11 mi13:13:281:49:108:205:29
8:03
-0:15
25K
15.53 mi13:34:092:09:518:2220:41
8:32
+0:29
30K
18.64 mi14:02:322:38:148:3028:23
9:09
+0:37
20M
20.00 mi14:14:352:50:178:3112:03
8:53
-0:16
21M
21.00 mi14:24:162:59:588:359:41
9:41
+0:48
35K
21.75 mi14:30:323:06:148:346:16
8:23
-1:18
23M
23.00 mi14:41:433:17:258:3611:11
8:57
+0:34
24M
24.00 mi14:50:123:25:548:358:29
8:29
-0:28
40K
24.85 mi14:58:083:33:508:377:56
9:17
+0:48
25.2M
25.20 mi15:01:203:37:028:373:12
9:17
0:00
FINISH
26.22 mi15:10:033:45:458:378:43
8:34
-0:43

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

8:03 /mi

Average Pace

8:37 /mi

Slowest Pace

9:41 /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

1:21:54

36% of race

Time at Steady Pace

1:11:25

32% of race

Time at Slower Pace

1:12:26

32% of race

Average Pace: 8:37 /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 mi11:51:3427:168:4727:16
8:47
#21568
10K
6.21 mi12:17:0652:488:3025:32
8:14
#20155
15K
9.32 mi12:42:131:17:558:2225:07
8:06
#19345
20K
12.43 mi13:07:591:43:418:2125:46
8:18
#19029
HALF
13.11 mi13:13:281:49:108:205:29
8:03
#18940
25K
15.53 mi13:34:092:09:518:2220:41
8:32
#18893
30K
18.64 mi14:02:322:38:148:3028:23
9:09
#19122
20M
20.00 mi14:14:352:50:178:3112:03
8:53
#19077
21M
21.00 mi14:24:162:59:588:359:41
9:41
#19081
35K
21.75 mi14:30:323:06:148:346:16
8:23
#18986
23M
23.00 mi14:41:433:17:258:3611:11
8:57
#18918
24M
24.00 mi14:50:123:25:548:358:29
8:29
#18824
40K
24.85 mi14:58:083:33:508:377:56
9:17
#18853
25.2M
25.20 mi15:01:203:37:028:373:12
9:17
#18806
FINISH
26.22 mi15:10:033:45:458:378:43
8:34
#18795
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 mi21568129991299917590(Top 61%)11269(Top 69%)11269(Top 467%)
10K6.21 mi3.10 mi20155+141312378+62112378+62118672(Top 64%)11757(Top 72%)11757(Top 487%)
15K9.32 mi3.11 mi19345+81012022+35612022+35617590(Top 61%)11269(Top 69%)11269(Top 467%)
20K12.43 mi3.11 mi19029+31611871+15111871+15118054(Top 62%)11433(Top 70%)11433(Top 474%)
HALF13.11 mi0.68 mi18940+8911826+4511826+4517400(Top 60%)11191(Top 68%)11191(Top 464%)
25K15.53 mi2.42 mi18893+4711798+2811798+2818727(Top 65%)11677(Top 71%)11677(Top 484%)
30K18.64 mi3.11 mi19122-22911867-6911867-6920213(Top 70%)12286(Top 75%)12286(Top 509%)
20M20.00 mi1.36 mi19077+4511830+3711830+3718306(Top 63%)11302(Top 69%)11302(Top 468%)
21M21.00 mi1.00 mi19081-411822+811822+819306(Top 67%)11747(Top 72%)11747(Top 487%)
35K21.75 mi0.75 mi18986+9511759+6311759+6316887(Top 58%)10573(Top 65%)10573(Top 438%)
23M23.00 mi1.25 mi18918+6811717+4211717+4218174(Top 63%)11060(Top 68%)11060(Top 458%)
24M24.00 mi1.00 mi18824+9411654+6311654+6316789(Top 58%)10392(Top 64%)10392(Top 431%)
40K24.85 mi0.85 mi18853-2911651+311651+319568(Top 67%)11631(Top 71%)11631(Top 482%)
25.2M25.20 mi0.35 mi18806+4711622+2911622+2916177(Top 56%)10070(Top 62%)10070(Top 417%)
FINISH26.22 mi1.02 mi18795+1111606+1611606+1618415(Top 63%)11092(Top 68%)11092(Top 460%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21
+97ft-345ft

Overall

17590

Males

11269

M45-49

11269

5K→10K

3.1 - 6.2 mi

Top 64%
×5
+79ft-138ft

Overall

18672

Males

11757

M45-49

11757

10K→15K

6.2 - 9.3 mi

Top 61%
×3
+67ft-78ft

Overall

17590

Males

11269

M45-49

11269

15K→20K

9.3 - 12.4 mi

Top 62%
×5
+106ft-86ft

Overall

18054

Males

11433

M45-49

11433

20K→HALF

12.4 - 13.1 mi

Top 60%
×2
+19ft-37ft

Overall

17400

Males

11191

M45-49

11191

HALF→25K

13.1 - 15.5 mi

Top 65%
×4
+66ft-88ft

Overall

18727

Males

11677

M45-49

11677

25K→30K

15.5 - 18.6 mi

Top 70%
×9
+181ft-148ft

Overall

20213

Males

12286

M45-49

12286

30K→20M

18.6 - 20.0 mi

Top 63%
×5
+64ft-50ft

Overall

18306

Males

11302

M45-49

11302

20M→21M

20.0 - 21.0 mi

Top 67%
×8
+106ft-24ft

Overall

19306

Males

11747

M45-49

11747

21M→35K

21.0 - 21.8 mi

Top 58%
×7
+17ft-86ft

Overall

16887

Males

10573

M45-49

10573

35K→23M

21.8 - 23.0 mi

Top 63%
×5
+23ft-63ft

Overall

18174

Males

11060

M45-49

11060

23M→24M

23.0 - 24.0 mi

Top 58%
×6
+12ft-82ft

Overall

16789

Males

10392

M45-49

10392

24M→40K

24.0 - 24.9 mi

Top 67%
×1
+6ft-20ft

Overall

19568

Males

11631

M45-49

11631

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1
+13ft-16ft

Overall

16177

Males

10070

M45-49

10070

25.2M→FINISH

25.2 - 26.2 mi

Top 63%
×2
+22ft-21ft

Overall

18415

Males

11092

M45-49

11092

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3688
Passed By
915
Net Change
+2773
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21568
5K → 10K144330+1413#21568#20155
10K → 15K82414+810#20155#19345
15K → 20K34226+316#19345#19029
20K → HALF901+89#19029#18940
HALF → 25K14699+47#18940#18893
25K → 30K129358-229#18893#19122
30K → 20M12479+45#19122#19077
20M → 21M8387-4#19077#19081
21M → 35K10510+95#19081#18986
35K → 23M11345+68#18986#18918
23M → 24M11824+94#18918#18824
24M → 40K5382-29#18824#18853
40K → 25.2M525+47#18853#18806
25.2M → FINISH6655+11#18806#18795
TOTALS3688915+2773
📊

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