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BOSTON MARATHON 2026

Carlos Alfieri

Bib: 32901•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
31:24
3.11 mi
Rank: #26233
Start → 5K
31:24 | 10:07/mi
10K
1:02:35
6.21 mi
Rank: #26090 (+143)
5K → 10K
31:11 | 10:03/mi
15K
1:32:35
9.32 mi
Rank: #25659 (+431)
10K → 15K
30:00 | 9:40/mi
20K
2:02:00
12.43 mi
Rank: #25164 (+495)
15K → 20K
29:25 | 9:29/mi
HALF
2:08:18
13.11 mi
Rank: #25084 (+80)
20K → HALF
6:18 | 9:15/mi
25K
2:31:00
15.53 mi
Rank: #24699 (+385)
HALF → 25K
22:42 | 9:22/mi
30K
3:00:32
18.64 mi
Rank: #24155 (+544)
25K → 30K
29:32 | 9:31/mi
20M
3:13:10
20.00 mi
Rank: #23892 (+263)
30K → 20M
12:38 | 9:19/mi
21M
3:22:55
21.00 mi
Rank: #23665 (+227)
20M → 21M
9:45 | 9:45/mi
35K
3:29:53
21.75 mi
Rank: #23569 (+96)
21M → 35K
6:58 | 9:19/mi
23M
3:41:47
23.00 mi
Rank: #23378 (+191)
35K → 23M
11:54 | 9:31/mi
24M
3:51:07
24.00 mi
Rank: #23259 (+119)
23M → 24M
9:20 | 9:20/mi
40K
3:59:26
24.85 mi
Rank: #23156 (+103)
24M → 40K
8:19 | 9:44/mi
25.2M
4:02:49
25.20 mi
Rank: #23096 (+60)
40K → 25.2M
3:23 | 9:49/mi
FINISH
4:11:24
26.22 mi
Rank: #22949 (+147)
25.2M → FINISH
8:35 | 8:26/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time2:08:18
Pace9:48 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:03:06
Pace9:24 /mi
📊Negative Split: 4.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:01:0931:2410:0731:24
10:07
-
10K
6.21 mi12:32:201:02:3510:0531:11
10:03
-0:04
15K
9.32 mi13:02:201:32:359:5630:00
9:40
-0:23
20K
12.43 mi13:31:452:02:009:5029:25
9:29
-0:11
HALF
13.11 mi13:38:032:08:189:486:18
9:15
-0:14
25K
15.53 mi14:00:452:31:009:4422:42
9:22
+0:07
30K
18.64 mi14:30:173:00:329:4229:32
9:31
+0:09
20M
20.00 mi14:42:553:13:109:4012:38
9:19
-0:12
21M
21.00 mi14:52:403:22:559:409:45
9:45
+0:26
35K
21.75 mi14:59:383:29:539:406:58
9:19
-0:26
23M
23.00 mi15:11:323:41:479:3911:54
9:31
+0:12
24M
24.00 mi15:20:523:51:079:389:20
9:20
-0:11
40K
24.85 mi15:29:113:59:269:388:19
9:44
+0:24
25.2M
25.20 mi15:32:344:02:499:393:23
9:49
+0:05
FINISH
26.22 mi15:41:094:11:249:368:35
8:26
-1:23

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

8:26 /mi

Average Pace

9:36 /mi

Slowest Pace

10:07 /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

14:53

6% of race

Time at Steady Pace

2:53:56

69% of race

Time at Slower Pace

1:02:35

25% of race

Average Pace: 9:35 /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 mi12:01:0931:2410:0731:24
10:07
#26233
10K
6.21 mi12:32:201:02:3510:0531:11
10:03
#26090
15K
9.32 mi13:02:201:32:359:5630:00
9:40
#25659
20K
12.43 mi13:31:452:02:009:5029:25
9:29
#25164
HALF
13.11 mi13:38:032:08:189:486:18
9:15
#25084
25K
15.53 mi14:00:452:31:009:4422:42
9:22
#24699
30K
18.64 mi14:30:173:00:329:4229:32
9:31
#24155
20M
20.00 mi14:42:553:13:109:4012:38
9:19
#23892
21M
21.00 mi14:52:403:22:559:409:45
9:45
#23665
35K
21.75 mi14:59:383:29:539:406:58
9:19
#23569
23M
23.00 mi15:11:323:41:479:3911:54
9:31
#23378
24M
24.00 mi15:20:523:51:079:389:20
9:20
#23259
40K
24.85 mi15:29:113:59:269:388:19
9:44
#23156
25.2M
25.20 mi15:32:344:02:499:393:23
9:49
#23096
FINISH
26.22 mi15:41:094:11:249:368:35
8:26
#22949
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 mi26233153011530124845(Top 86%)14651(Top 90%)14651(Top 607%)
10K6.21 mi3.10 mi26090+14315223+7815223+7825939(Top 89%)15147(Top 93%)15147(Top 628%)
15K9.32 mi3.11 mi25659+43115028+19515028+19524845(Top 86%)14651(Top 90%)14651(Top 607%)
20K12.43 mi3.11 mi25164+49514784+24414784+24423663(Top 82%)14043(Top 86%)14043(Top 582%)
HALF13.11 mi0.68 mi25084+8014754+3014754+3023596(Top 81%)14021(Top 86%)14021(Top 581%)
25K15.53 mi2.42 mi24699+38514570+18414570+18422579(Top 78%)13513(Top 83%)13513(Top 560%)
30K18.64 mi3.11 mi24155+54414281+28914281+28921664(Top 75%)12978(Top 79%)12978(Top 538%)
20M20.00 mi1.36 mi23892+26314144+13714144+13720289(Top 70%)12247(Top 75%)12247(Top 508%)
21M21.00 mi1.00 mi23665+22714012+13214012+13219569(Top 67%)11879(Top 73%)11879(Top 492%)
35K21.75 mi0.75 mi23569+9613948+6413948+6421197(Top 73%)12586(Top 77%)12586(Top 522%)
23M23.00 mi1.25 mi23378+19113840+10813840+10820627(Top 71%)12283(Top 75%)12283(Top 509%)
24M24.00 mi1.00 mi23259+11913769+7113769+7120741(Top 71%)12255(Top 75%)12255(Top 508%)
40K24.85 mi0.85 mi23156+10313703+6613703+6621118(Top 73%)12405(Top 76%)12405(Top 514%)
25.2M25.20 mi0.35 mi23096+6013673+3013673+3018671(Top 64%)11237(Top 69%)11237(Top 466%)
FINISH26.22 mi1.02 mi22949+14713587+8613587+8617746(Top 61%)10778(Top 66%)10778(Top 447%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21
+97ft-345ft

Overall

24845

Males

14651

M45-49

14651

5K→10K

3.1 - 6.2 mi

Top 89%
×5
+79ft-138ft

Overall

25939

Males

15147

M45-49

15147

10K→15K

6.2 - 9.3 mi

Top 86%
×3
+67ft-78ft

Overall

24845

Males

14651

M45-49

14651

15K→20K

9.3 - 12.4 mi

Top 82%
×5
+106ft-86ft

Overall

23663

Males

14043

M45-49

14043

20K→HALF

12.4 - 13.1 mi

Top 81%
×2
+19ft-37ft

Overall

23596

Males

14021

M45-49

14021

HALF→25K

13.1 - 15.5 mi

Top 78%
×4
+66ft-88ft

Overall

22579

Males

13513

M45-49

13513

25K→30K

15.5 - 18.6 mi

Top 75%
×9
+181ft-148ft

Overall

21664

Males

12978

M45-49

12978

30K→20M

18.6 - 20.0 mi

Top 70%
×5
+64ft-50ft

Overall

20289

Males

12247

M45-49

12247

20M→21M

20.0 - 21.0 mi

Top 67%
×8
+106ft-24ft

Overall

19569

Males

11879

M45-49

11879

21M→35K

21.0 - 21.8 mi

Top 73%
×7
+17ft-86ft

Overall

21197

Males

12586

M45-49

12586

35K→23M

21.8 - 23.0 mi

Top 71%
×5
+23ft-63ft

Overall

20627

Males

12283

M45-49

12283

23M→24M

23.0 - 24.0 mi

Top 71%
×6
+12ft-82ft

Overall

20741

Males

12255

M45-49

12255

24M→40K

24.0 - 24.9 mi

Top 73%
×1
+6ft-20ft

Overall

21118

Males

12405

M45-49

12405

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1
+13ft-16ft

Overall

18671

Males

11237

M45-49

11237

25.2M→FINISH

25.2 - 26.2 mi

Top 61%
×2
+22ft-21ft

Overall

17746

Males

10778

M45-49

10778

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3457
Passed By
173
Net Change
+3284
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26233
5K → 10K273130+143#26233#26090
10K → 15K4398+431#26090#25659
15K → 20K4994+495#25659#25164
20K → HALF844+80#25164#25084
HALF → 25K3850+385#25084#24699
25K → 30K5440+544#24699#24155
30K → 20M2641+263#24155#23892
20M → 21M2303+227#23892#23665
21M → 35K1015+96#23665#23569
35K → 23M1932+191#23569#23378
23M → 24M1267+119#23378#23259
24M → 40K1107+103#23259#23156
40K → 25.2M611+60#23156#23096
25.2M → FINISH1481+147#23096#22949
TOTALS3457173+3284
📊

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