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BOSTON MARATHON 2026

Sam Chelanga

CO

Bib: 31 M

0:00
0:00
/ mi
MastersOTQ
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Overall
#0 / 29021
Top 0.1%
Gender (Male)
#0 / 16340
Top 0.3%
Masters (Masters Men)
#0 / 10617
Top 0.1%
Division (M40-44)
#0 / 2198
Top 0.1%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
4:40/mi
14:28
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
4:49/mi
29:23
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
4:51/mi
44:24
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
4:54/mi
59:37
↑ 106↓ 860.1%
165 ft elev
HALF· 13.11 mi
4:55/mi
1:02:58
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
4:58/mi
1:14:59
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
5:07/mi
1:30:50
↑ 181↓ 1480.2%
138 ft elev
20M
5:21/mi
1:38:06
↑ 64↓ 500.2%
148 ft elev
21M
6:00/mi
1:44:06
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
5:28/mi
1:48:11
↑ 17↓ 861.7%
156 ft elev
23M
5:54/mi
1:55:34
↑ 23↓ 630.6%
116 ft elev
24M
5:50/mi
2:01:24
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:07/mi
2:06:37
↓ 200.3%
20 ft elev
25.2M
6:44/mi
2:08:56
↑ 13↓ 160.2%
18 ft elev
FINISH· 26.22 mi
5:57/mi
2:14:59
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via HALF
1:02:584:49 /mi⚡ faster
2nd Half
1:12:015:30 /mi+14.4%
Positive split — 14.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
14:284:403.11 mi14:28
4:40
-
10K
29:234:443.10 mi14:55
4:49
+0:09
15K
44:244:463.11 mi15:01
4:51
+0:02
20K
59:374:483.11 mi15:13
4:54
+0:03
HALF(13.11 mi)
1:02:584:490.68 mi3:21
4:55
+0:01
25K
1:14:594:502.42 mi12:01
4:58
+0:03
30K
1:30:504:533.11 mi15:51
5:07
+0:09
20M
1:38:064:551.36 mi7:16
5:21
+0:14
21M
1:44:064:581.00 mi6:00
6:00
+0:39
35K
1:48:114:590.75 mi4:05
5:28
-0:32
23M
1:55:345:021.25 mi7:23
5:54
+0:26
24M
2:01:245:041.00 mi5:50
5:50
-0:04
40K
2:06:375:060.85 mi5:13
6:07
+0:17
25.2M
2:08:565:070.35 mi2:19
6:44
+0:37
FINISH(26.22 mi)
2:14:595:101.02 mi6:03
5:57
-0:47
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

4:40 /mi

Average Pace

5:09 /mi

Slowest Pace

6:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:14:59

56% of race

Time at Steady Pace

27:12

20% of race

Time at Slower Pace

32:48

24% of race

Average Pace: 5:09 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi242424232323
10K3.10 mi25-125-125-1252525
15K3.11 mi252525232323
20K3.11 mi23+223+223+2232323
HALF(13.11 mi)0.68 mi232323292929
25K2.42 mi232323272727
30K3.11 mi24-124-124-1323232
20M1.36 mi27-327-327-3595555
21M1.00 mi28-128-128-1281266266
35K0.75 mi29-129-129-1195180180
23M1.25 mi35-635-635-6489465465
24M1.00 mi40-540-540-5650618618
40K0.85 mi41-141-141-1105910071007
25.2M0.35 mi414141164215311531
FINISH(26.22 mi)1.02 mi43-243-243-2144113611361

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.08%
×21story building
+97ft-345ft

Overall

23

Males

23

M40-44

23

5K→10K

3.1 - 6.2 mi

Top 0.09%
×5story building
+79ft-138ft

Overall

25

Males

25

M40-44

25

10K→15K

6.2 - 9.3 mi

Top 0.08%
×3story building
+67ft-78ft

Overall

23

Males

23

M40-44

23

15K→20K

9.3 - 12.4 mi

Top 0.08%
×5story building
+106ft-86ft

Overall

23

Males

23

M40-44

23

20K→HALF

12.4 - 13.1 mi

Top 0.10%
×2story building
+19ft-37ft

Overall

29

Males

29

M40-44

29

HALF→25K

13.1 - 15.5 mi

Top 0.09%
×4story building
+66ft-88ft

Overall

27

Males

27

M40-44

27

25K→30K

15.5 - 18.6 mi

Top 0.1%
×9story building
+181ft-148ft

Overall

32

Males

32

M40-44

32

30K→20M

18.6 - 20.0 mi

Top 0.2%
×5story building
+64ft-50ft

Overall

59

Males

55

M40-44

55

20M→21M

20.0 - 21.0 mi

Top 1.0%
×8story building
+106ft-24ft

Overall

281

Males

266

M40-44

266

21M→35K

21.0 - 21.8 mi

Top 0.7%
×7story building
+17ft-86ft

Overall

195

Males

180

M40-44

180

35K→23M

21.8 - 23.0 mi

Top 2%
×5story building
+23ft-63ft

Overall

489

Males

465

M40-44

465

23M→24M

23.0 - 24.0 mi

Top 2%
×6story building
+12ft-82ft

Overall

650

Males

618

M40-44

618

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1059

Males

1007

M40-44

1007

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1642

Males

1531

M40-44

1531

25.2M→FINISH

25.2 - 26.2 mi

Top 5%
×2story building
+22ft-21ft

Overall

1441

Males

1361

M40-44

1361

Passing Analysis

Category:
Passed
2
Passed By
21
Net Change
-19
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24
5K → 10K01-1#24#25
10K → 15K000#25#25
15K → 20K20+2#25#23
20K → HALF000#23#23
HALF → 25K000#23#23
25K → 30K01-1#23#24
30K → 20M03-3#24#27
20M → 21M01-1#27#28
21M → 35K01-1#28#29
35K → 23M06-6#29#35
23M → 24M05-5#35#40
24M → 40K01-1#40#41
40K → 25.2M000#41#41
25.2M → FINISH02-2#41#43
TOTALS221-19

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing