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BOSTON MARATHON 2026

Alex Defronzo

Bib: 33286•M

MA

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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Age Group (M18-39)
#0 / 5723
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
30:59
3.11 mi
Rank: #25876
Start → 5K
30:59 | 9:59/mi
10K
1:02:47
6.21 mi
Rank: #26169 (-293)
5K → 10K
31:48 | 10:15/mi
15K
1:35:44
9.32 mi
Rank: #26458 (-289)
10K → 15K
32:57 | 10:37/mi
20K
2:08:14
12.43 mi
Rank: #26349 (+109)
15K → 20K
32:30 | 10:28/mi
HALF
2:15:37
13.11 mi
Rank: #26403 (-54)
20K → HALF
7:23 | 10:50/mi
25K
2:43:38
15.53 mi
Rank: #26538 (-135)
HALF → 25K
28:01 | 11:34/mi
30K
3:24:36
18.64 mi
Rank: #26956 (-418)
25K → 30K
40:58 | 13:12/mi
20M
3:42:37
20.00 mi
Rank: #27047 (-91)
30K → 20M
18:01 | 13:16/mi
21M
3:57:12
21.00 mi
Rank: #27141 (-94)
20M → 21M
14:35 | 14:35/mi
35K
4:08:03
21.75 mi
Rank: #27238 (-97)
21M → 35K
10:51 | 14:31/mi
23M
4:25:31
23.00 mi
Rank: #27337 (-99)
35K → 23M
17:28 | 13:58/mi
24M
4:40:47
24.00 mi
Rank: #27481 (-144)
23M → 24M
15:16 | 15:16/mi
40K
4:56:51
24.85 mi
Rank: #27695 (-214)
24M → 40K
16:04 | 18:48/mi
25.2M
5:03:04
25.20 mi
Rank: #27738 (-43)
40K → 25.2M
6:13 | 18:02/mi
FINISH
5:16:41
26.22 mi
Rank: #27777 (-39)
25.2M → FINISH
13:37 | 13:22/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time2:15:37
Pace10:21 /mi
2nd Half
Distance13.11 mi
Time3:01:04
Pace13:49 /mi
📊Positive Split: 33.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:01:2730:599:5930:59
9:59
-
10K
6.21 mi12:33:151:02:4710:0731:48
10:15
+0:16
15K
9.32 mi13:06:121:35:4410:1732:57
10:37
+0:22
20K
12.43 mi13:38:422:08:1410:2032:30
10:28
-0:09
HALF
13.11 mi13:46:052:15:3710:217:23
10:50
+0:22
25K
15.53 mi14:14:062:43:3810:3328:01
11:34
+0:44
30K
18.64 mi14:55:043:24:3610:5940:58
13:12
+1:38
20M
20.00 mi15:13:053:42:3711:0818:01
13:16
+0:04
21M
21.00 mi15:27:403:57:1211:1814:35
14:35
+1:19
35K
21.75 mi15:38:314:08:0311:2510:51
14:31
-0:04
23M
23.00 mi15:55:594:25:3111:3317:28
13:58
-0:33
24M
24.00 mi16:11:154:40:4711:4215:16
15:16
+1:18
40K
24.85 mi16:27:194:56:5111:5716:04
18:48
+3:32
25.2M
25.20 mi16:33:325:03:0412:026:13
18:02
-0:46
FINISH
26.22 mi16:47:095:16:4112:0613:37
13:22
-4:40

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

9:59 /mi

Average Pace

12:05 /mi

Slowest Pace

18:48 /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

2:43:38

52% of race

Time at Steady Pace

1:55:30

36% of race

Time at Slower Pace

37:33

12% of race

Average Pace: 12:05 /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 mi12:01:2730:599:5930:59
9:59
#25876
10K
6.21 mi12:33:151:02:4710:0731:48
10:15
#26169
15K
9.32 mi13:06:121:35:4410:1732:57
10:37
#26458
20K
12.43 mi13:38:422:08:1410:2032:30
10:28
#26349
HALF
13.11 mi13:46:052:15:3710:217:23
10:50
#26403
25K
15.53 mi14:14:062:43:3810:3328:01
11:34
#26538
30K
18.64 mi14:55:043:24:3610:5940:58
13:12
#26956
20M
20.00 mi15:13:053:42:3711:0818:01
13:16
#27047
21M
21.00 mi15:27:403:57:1211:1814:35
14:35
#27141
35K
21.75 mi15:38:314:08:0311:2510:51
14:31
#27238
23M
23.00 mi15:55:594:25:3111:3317:28
13:58
#27337
24M
24.00 mi16:11:154:40:4711:4215:16
15:16
#27481
40K
24.85 mi16:27:194:56:5111:5716:04
18:48
#27695
25.2M
25.20 mi16:33:325:03:0412:026:13
18:02
#27738
FINISH
26.22 mi16:47:095:16:4112:0613:37
13:22
#27777
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25876151431514326873(Top 93%)15549(Top 95%)15549(Top 272%)
10K6.21 mi3.10 mi26169-29315260-11715260-11726389(Top 91%)15343(Top 94%)15343(Top 268%)
15K9.32 mi3.11 mi26458-28915383-12315383-12326873(Top 93%)15549(Top 95%)15549(Top 272%)
20K12.43 mi3.11 mi26349+10915321+6215321+6226041(Top 90%)15181(Top 93%)15181(Top 265%)
HALF13.11 mi0.68 mi26403-5415345-2415345-2427165(Top 94%)15608(Top 96%)15608(Top 273%)
25K15.53 mi2.42 mi26538-13515396-5115396-5127072(Top 93%)15565(Top 95%)15565(Top 272%)
30K18.64 mi3.11 mi26956-41815540-14415540-14427865(Top 96%)15847(Top 97%)15847(Top 277%)
20M20.00 mi1.36 mi27047-9115568-2815568-2827633(Top 95%)15696(Top 96%)15696(Top 274%)
21M21.00 mi1.00 mi27141-9415602-3415602-3427786(Top 96%)15737(Top 96%)15737(Top 275%)
35K21.75 mi0.75 mi27238-9715646-4415646-4428562(Top 98%)16077(Top 98%)16077(Top 281%)
23M23.00 mi1.25 mi27337-9915671-2515671-2528116(Top 97%)15864(Top 97%)15864(Top 277%)
24M24.00 mi1.00 mi27481-14415718-4715718-4728772(Top 99%)16189(Top 99%)16189(Top 283%)
40K24.85 mi0.85 mi27695-21415809-9115809-9128966(Top 100%)16303(Top 100%)16303(Top 285%)
25.2M25.20 mi0.35 mi27738-4315825-1615825-1628862(Top 99%)16231(Top 99%)16231(Top 284%)
FINISH26.22 mi1.02 mi27777-3915833-815833-828428(Top 98%)16004(Top 98%)16004(Top 280%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21
+97ft-345ft

Overall

26873

Males

15549

M18-39

15549

5K→10K

3.1 - 6.2 mi

Top 91%
×5
+79ft-138ft

Overall

26389

Males

15343

M18-39

15343

10K→15K

6.2 - 9.3 mi

Top 93%
×3
+67ft-78ft

Overall

26873

Males

15549

M18-39

15549

15K→20K

9.3 - 12.4 mi

Top 90%
×5
+106ft-86ft

Overall

26041

Males

15181

M18-39

15181

20K→HALF

12.4 - 13.1 mi

Top 94%
×2
+19ft-37ft

Overall

27165

Males

15608

M18-39

15608

HALF→25K

13.1 - 15.5 mi

Top 93%
×4
+66ft-88ft

Overall

27072

Males

15565

M18-39

15565

25K→30K

15.5 - 18.6 mi

Top 96%
×9
+181ft-148ft

Overall

27865

Males

15847

M18-39

15847

30K→20M

18.6 - 20.0 mi

Top 95%
×5
+64ft-50ft

Overall

27633

Males

15696

M18-39

15696

20M→21M

20.0 - 21.0 mi

Top 96%
×8
+106ft-24ft

Overall

27786

Males

15737

M18-39

15737

21M→35K

21.0 - 21.8 mi

Top 98%
×7
+17ft-86ft

Overall

28562

Males

16077

M18-39

16077

35K→23M

21.8 - 23.0 mi

Top 97%
×5
+23ft-63ft

Overall

28116

Males

15864

M18-39

15864

23M→24M

23.0 - 24.0 mi

Top 99%
×6
+12ft-82ft

Overall

28772

Males

16189

M18-39

16189

24M→40K

24.0 - 24.9 mi

Top 100%
×1
+6ft-20ft

Overall

28966

Males

16303

M18-39

16303

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1
+13ft-16ft

Overall

28862

Males

16231

M18-39

16231

25.2M→FINISH

25.2 - 26.2 mi

Top 98%
×2
+22ft-21ft

Overall

28428

Males

16004

M18-39

16004

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
454
Passed By
1770
Net Change
-1901
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25876
5K → 10K94200-293#25876#26169
10K → 15K51200-289#26169#26458
15K → 20K16556+109#26458#26349
20K → HALF862-54#26349#26403
HALF → 25K54189-135#26403#26538
25K → 30K25200-418#26538#26956
30K → 20M13104-91#26956#27047
20M → 21M12106-94#27047#27141
21M → 35K7104-97#27141#27238
35K → 23M7106-99#27238#27337
23M → 24M6150-144#27337#27481
24M → 40K1200-214#27481#27695
40K → 25.2M144-43#27695#27738
25.2M → FINISH1049-39#27738#27777
TOTALS4541770-1901
📊

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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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing