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BOSTON MARATHON 2026

Constantin-Radu Calomfirescu

Bib: 12520β€’M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 44%
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Top 47%
Age Group (M45-49)
#0 / 2413
Race Day Weather
51Β°/41Β°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
23:10
3.11 mi
Rank: #12407
Start β†’ 5K
23:10 | 7:28/mi
10K
46:22
6.21 mi
Rank: #12499 (-92)
5K β†’ 10K
23:12 | 7:29/mi
15K
1:09:27
9.32 mi
Rank: #12395 (+104)
10K β†’ 15K
23:05 | 7:26/mi
20K
1:33:24
12.43 mi
Rank: #12726 (-331)
15K β†’ 20K
23:57 | 7:43/mi
HALF
1:38:31
13.11 mi
Rank: #12740 (-14)
20K β†’ HALF
5:07 | 7:31/mi
25K
1:57:27
15.53 mi
Rank: #12933 (-193)
HALF β†’ 25K
18:56 | 7:49/mi
30K
2:22:41
18.64 mi
Rank: #13148 (-215)
25K β†’ 30K
25:14 | 8:08/mi
20M
2:33:54
20.00 mi
Rank: #13239 (-91)
30K β†’ 20M
11:13 | 8:16/mi
21M
2:42:51
21.00 mi
Rank: #13380 (-141)
20M β†’ 21M
8:57 | 8:57/mi
35K
2:48:50
21.75 mi
Rank: #13400 (-20)
21M β†’ 35K
5:59 | 8:00/mi
23M
2:58:53
23.00 mi
Rank: #13322 (+78)
35K β†’ 23M
10:03 | 8:02/mi
24M
3:06:27
24.00 mi
Rank: #13196 (+126)
23M β†’ 24M
7:34 | 7:34/mi
40K
3:13:06
24.85 mi
Rank: #13090 (+106)
24M β†’ 40K
6:39 | 7:47/mi
25.2M
3:15:59
25.20 mi
Rank: #13034 (+56)
40K β†’ 25.2M
2:53 | 8:22/mi
FINISH
3:23:24
26.22 mi
Rank: #12881 (+153)
25.2M β†’ FINISH
7:25 | 7:17/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:38:31
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:44:53
Pace8:01 /mi
πŸ“ŠPositive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4123:107:2823:10
7:28
-
10K
6.21 mi11:14:5346:227:2823:12
7:29
+0:01
15K
9.32 mi11:37:581:09:277:2823:05
7:26
-0:03
20K
12.43 mi12:01:551:33:247:3123:57
7:43
+0:17
HALF
13.11 mi12:07:021:38:317:315:07
7:31
-0:12
25K
15.53 mi12:25:581:57:277:3418:56
7:49
+0:18
30K
18.64 mi12:51:122:22:417:4025:14
8:08
+0:19
20M
20.00 mi13:02:252:33:547:4211:13
8:16
+0:08
21M
21.00 mi13:11:222:42:517:468:57
8:57
+0:41
35K
21.75 mi13:17:212:48:507:465:59
8:00
-0:57
23M
23.00 mi13:27:242:58:537:4710:03
8:02
+0:02
24M
24.00 mi13:34:583:06:277:477:34
7:34
-0:28
40K
24.85 mi13:41:373:13:067:476:39
7:47
+0:13
25.2M
25.20 mi13:44:303:15:597:472:53
8:22
+0:35
FINISH
26.22 mi13:51:553:23:247:467:25
7:17
-1:05

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

πŸ“ˆPace 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

7:17 /mi

Average Pace

7:46 /mi

Slowest Pace

8:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

πŸ“ŠSegments

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

1:29:33

44% of race

Time at Steady Pace

49:32

24% of race

Time at Slower Pace

1:04:19

32% of race

Average Pace: 7:45 /mi

Loading chart...
Faster pace (< avg)
Steady pace (β‰ˆ 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 mi10:51:4123:107:2823:10
7:28
#12407
10K
6.21 mi11:14:5346:227:2823:12
7:29
#12499
15K
9.32 mi11:37:581:09:277:2823:05
7:26
#12395
20K
12.43 mi12:01:551:33:247:3123:57
7:43
#12726
HALF
13.11 mi12:07:021:38:317:315:07
7:31
#12740
25K
15.53 mi12:25:581:57:277:3418:56
7:49
#12933
30K
18.64 mi12:51:122:22:417:4025:14
8:08
#13148
20M
20.00 mi13:02:252:33:547:4211:13
8:16
#13239
21M
21.00 mi13:11:222:42:517:468:57
8:57
#13380
35K
21.75 mi13:17:212:48:507:465:59
8:00
#13400
23M
23.00 mi13:27:242:58:537:4710:03
8:02
#13322
24M
24.00 mi13:34:583:06:277:477:34
7:34
#13196
40K
24.85 mi13:41:373:13:067:476:39
7:47
#13090
25.2M
25.20 mi13:44:303:15:597:472:53
8:22
#13034
FINISH
26.22 mi13:51:553:23:247:467:25
7:17
#12881
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 mi124079209920912216(Top 42%)9034(Top 55%)9034(Top 374%)
10K6.21 mi3.10 mi12499-929229-209229-2012631(Top 44%)9256(Top 57%)9256(Top 384%)
15K9.32 mi3.11 mi12395+1049164+659164+6512216(Top 42%)9034(Top 55%)9034(Top 374%)
20K12.43 mi3.11 mi12726-3319271-1079271-10713777(Top 47%)9635(Top 59%)9635(Top 399%)
HALF13.11 mi0.68 mi12740-149278-79278-713026(Top 45%)9375(Top 57%)9375(Top 389%)
25K15.53 mi2.42 mi12933-1939325-479325-4713884(Top 48%)9600(Top 59%)9600(Top 398%)
30K18.64 mi3.11 mi13148-2159361-369361-3614348(Top 49%)9693(Top 59%)9693(Top 402%)
20M20.00 mi1.36 mi13239-919384-239384-2314608(Top 50%)9725(Top 60%)9725(Top 403%)
21M21.00 mi1.00 mi13380-1419423-399423-3915827(Top 55%)10176(Top 62%)10176(Top 422%)
35K21.75 mi0.75 mi13400-209419+49419+414430(Top 50%)9499(Top 58%)9499(Top 394%)
23M23.00 mi1.25 mi13322+789364+559364+5512654(Top 44%)8668(Top 53%)8668(Top 359%)
24M24.00 mi1.00 mi13196+1269293+719293+7110610(Top 37%)7616(Top 47%)7616(Top 316%)
40K24.85 mi0.85 mi13090+1069225+689225+6810855(Top 37%)7633(Top 47%)7633(Top 316%)
25.2M25.20 mi0.35 mi13034+569189+369189+3610679(Top 37%)7486(Top 46%)7486(Top 310%)
FINISH26.22 mi1.02 mi12881+1539081+1089081+1089700(Top 33%)6972(Top 43%)6972(Top 289%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
Γ—21
+97ft-345ft

Overall

12216

Males

9034

M45-49

9034

5K→10K

3.1 - 6.2 mi

Top 44%
Γ—5
+79ft-138ft

Overall

12631

Males

9256

M45-49

9256

10K→15K

6.2 - 9.3 mi

Top 42%
Γ—3
+67ft-78ft

Overall

12216

Males

9034

M45-49

9034

15K→20K

9.3 - 12.4 mi

Top 47%
Γ—5
+106ft-86ft

Overall

13777

Males

9635

M45-49

9635

20K→HALF

12.4 - 13.1 mi

Top 45%
Γ—2
+19ft-37ft

Overall

13026

Males

9375

M45-49

9375

HALF→25K

13.1 - 15.5 mi

Top 48%
Γ—4
+66ft-88ft

Overall

13884

Males

9600

M45-49

9600

25K→30K

15.5 - 18.6 mi

Top 49%
Γ—9
+181ft-148ft

Overall

14348

Males

9693

M45-49

9693

30K→20M

18.6 - 20.0 mi

Top 50%
Γ—5
+64ft-50ft

Overall

14608

Males

9725

M45-49

9725

20M→21M

20.0 - 21.0 mi

Top 55%
Γ—8
+106ft-24ft

Overall

15827

Males

10176

M45-49

10176

21M→35K

21.0 - 21.8 mi

Top 50%
Γ—7
+17ft-86ft

Overall

14430

Males

9499

M45-49

9499

35K→23M

21.8 - 23.0 mi

Top 44%
Γ—5
+23ft-63ft

Overall

12654

Males

8668

M45-49

8668

23M→24M

23.0 - 24.0 mi

Top 37%
Γ—6
+12ft-82ft

Overall

10610

Males

7616

M45-49

7616

24M→40K

24.0 - 24.9 mi

Top 37%
Γ—1
+6ft-20ft

Overall

10855

Males

7633

M45-49

7633

40K→25.2M

24.9 - 25.2 mi

Top 37%
Γ—1
+13ft-16ft

Overall

10679

Males

7486

M45-49

7486

25.2M→FINISH

25.2 - 26.2 mi

Top 33%
Γ—2
+22ft-21ft

Overall

9700

Males

6972

M45-49

6972

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1540
Passed By
2014
Net Change
-474
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start β†’ 5K----#12407
5K β†’ 10K214306-92#12407#12499
10K β†’ 15K237133+104#12499#12395
15K β†’ 20K71402-331#12395#12726
20K β†’ HALF2741-14#12726#12740
HALF β†’ 25K77270-193#12740#12933
25K β†’ 30K123338-215#12933#13148
30K β†’ 20M79170-91#13148#13239
20M β†’ 21M44185-141#13239#13380
21M β†’ 35K5474-20#13380#13400
35K β†’ 23M13052+78#13400#13322
23M β†’ 24M13812+126#13322#13196
24M β†’ 40K11812+106#13196#13090
40K β†’ 25.2M593+56#13090#13034
25.2M β†’ FINISH16916+153#13034#12881
TOTALS15402014-474
πŸ“Š

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

πŸ“ˆPosition Graph

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🎨Heatmap Timeline

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πŸ”„Passing Circle

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🌊Position Flow

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πŸƒRace Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing