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BOSTON MARATHON 2026

Sebastian Perez

Bib: 12378•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 36%
Gender (Male)
#0 / 16340
Top 49%
Masters (Masters Men)
#0 / 10617
Top 38%
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
21:32
3.11 mi
Rank: #7991
Start → 5K
21:32 | 6:56/mi
10K
43:09
6.21 mi
Rank: #8178 (-187)
5K → 10K
21:37 | 6:58/mi
15K
1:04:40
9.32 mi
Rank: #8108 (+70)
10K → 15K
21:31 | 6:56/mi
20K
1:26:09
12.43 mi
Rank: #7860 (+248)
15K → 20K
21:29 | 6:55/mi
HALF
1:30:48
13.11 mi
Rank: #7833 (+27)
20K → HALF
4:39 | 6:50/mi
25K
1:47:31
15.53 mi
Rank: #7563 (+270)
HALF → 25K
16:43 | 6:54/mi
30K
2:09:08
18.64 mi
Rank: #7170 (+393)
25K → 30K
21:37 | 6:58/mi
20M
2:19:11
20.00 mi
Rank: #7213 (-43)
30K → 20M
10:03 | 7:24/mi
21M
2:27:23
21.00 mi
Rank: #7360 (-147)
20M → 21M
8:12 | 8:12/mi
35K
2:33:01
21.75 mi
Rank: #7462 (-102)
21M → 35K
5:38 | 7:32/mi
23M
2:44:22
23.00 mi
Rank: #8097 (-635)
35K → 23M
11:21 | 9:05/mi
24M
2:53:20
24.00 mi
Rank: #8641 (-544)
23M → 24M
8:58 | 8:58/mi
40K
3:01:03
24.85 mi
Rank: #9006 (-365)
24M → 40K
7:43 | 9:02/mi
25.2M
3:05:33
25.20 mi
Rank: #9542 (-536)
40K → 25.2M
4:30 | 13:03/mi
FINISH
3:15:38
26.22 mi
Rank: #10427 (-885)
25.2M → FINISH
10:05 | 9:54/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:30:48
Pace6:56 /mi
2nd Half
Distance13.11 mi
Time1:44:50
Pace8:00 /mi
📊Positive Split: 15.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:4621:326:5621:32
6:56
-
10K
6.21 mi11:11:2343:096:5721:37
6:58
+0:02
15K
9.32 mi11:32:541:04:406:5721:31
6:56
-0:02
20K
12.43 mi11:54:231:26:096:5621:29
6:55
-0:01
HALF
13.11 mi11:59:021:30:486:564:39
6:50
-0:05
25K
15.53 mi12:15:451:47:316:5616:43
6:54
+0:04
30K
18.64 mi12:37:222:09:086:5621:37
6:58
+0:04
20M
20.00 mi12:47:252:19:116:5810:03
7:24
+0:26
21M
21.00 mi12:55:372:27:237:028:12
8:12
+0:48
35K
21.75 mi13:01:152:33:017:035:38
7:32
-0:40
23M
23.00 mi13:12:362:44:227:0911:21
9:05
+1:33
24M
24.00 mi13:21:342:53:207:148:58
8:58
-0:07
40K
24.85 mi13:29:173:01:037:187:43
9:02
+0:04
25.2M
25.20 mi13:33:473:05:337:224:30
13:03
+4:01
FINISH
26.22 mi13:43:523:15:387:2910:05
9:54
-3:09

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

6:50 /mi

Average Pace

7:28 /mi

Slowest Pace

13:03 /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

0:00

0% of race

Time at Steady Pace

2:33:01

78% of race

Time at Slower Pace

42:37

22% of race

Average Pace: 7:28 /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 mi10:49:4621:326:5621:32
6:56
#7991
10K
6.21 mi11:11:2343:096:5721:37
6:58
#8178
15K
9.32 mi11:32:541:04:406:5721:31
6:56
#8108
20K
12.43 mi11:54:231:26:096:5621:29
6:55
#7860
HALF
13.11 mi11:59:021:30:486:564:39
6:50
#7833
25K
15.53 mi12:15:451:47:316:5616:43
6:54
#7563
30K
18.64 mi12:37:222:09:086:5621:37
6:58
#7170
20M
20.00 mi12:47:252:19:116:5810:03
7:24
#7213
21M
21.00 mi12:55:372:27:237:028:12
8:12
#7360
35K
21.75 mi13:01:152:33:017:035:38
7:32
#7462
23M
23.00 mi13:12:362:44:227:0911:21
9:05
#8097
24M
24.00 mi13:21:342:53:207:148:58
8:58
#8641
40K
24.85 mi13:29:173:01:037:187:43
9:02
#9006
25.2M
25.20 mi13:33:473:05:337:224:30
13:03
#9542
FINISH
26.22 mi13:43:523:15:387:2910:05
9:54
#10427
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 mi7991689368938014(Top 28%)6878(Top 42%)6878(Top 285%)
10K6.21 mi3.10 mi8178-1877011-1187011-1188379(Top 29%)7126(Top 44%)7126(Top 295%)
15K9.32 mi3.11 mi8108+706952+596952+598014(Top 28%)6878(Top 42%)6878(Top 285%)
20K12.43 mi3.11 mi7860+2486785+1676785+1677223(Top 25%)6319(Top 39%)6319(Top 262%)
HALF13.11 mi0.68 mi7833+276768+176768+177353(Top 25%)6438(Top 39%)6438(Top 267%)
25K15.53 mi2.42 mi7563+2706570+1986570+1986643(Top 23%)5847(Top 36%)5847(Top 242%)
30K18.64 mi3.11 mi7170+3936291+2796291+2795597(Top 19%)5007(Top 31%)5007(Top 208%)
20M20.00 mi1.36 mi7213-436303-126303-128383(Top 29%)6711(Top 41%)6711(Top 278%)
21M21.00 mi1.00 mi7360-1476381-786381-7811158(Top 38%)8051(Top 49%)8051(Top 334%)
35K21.75 mi0.75 mi7462-1026439-586439-5811052(Top 38%)7980(Top 49%)7980(Top 331%)
23M23.00 mi1.25 mi8097-6356791-3526791-35218816(Top 65%)11363(Top 70%)11363(Top 471%)
24M24.00 mi1.00 mi8641-5447069-2787069-27819281(Top 66%)11544(Top 71%)11544(Top 478%)
40K24.85 mi0.85 mi9006-3657255-1867255-18618498(Top 64%)11109(Top 68%)11109(Top 460%)
25.2M25.20 mi0.35 mi9542-5367548-2937548-29326091(Top 90%)14828(Top 91%)14828(Top 615%)
FINISH26.22 mi1.02 mi10427-8857962-4147962-41423531(Top 81%)13550(Top 83%)13550(Top 562%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21
+97ft-345ft

Overall

8014

Males

6878

M45-49

6878

5K→10K

3.1 - 6.2 mi

Top 29%
×5
+79ft-138ft

Overall

8379

Males

7126

M45-49

7126

10K→15K

6.2 - 9.3 mi

Top 28%
×3
+67ft-78ft

Overall

8014

Males

6878

M45-49

6878

15K→20K

9.3 - 12.4 mi

Top 25%
×5
+106ft-86ft

Overall

7223

Males

6319

M45-49

6319

20K→HALF

12.4 - 13.1 mi

Top 25%
×2
+19ft-37ft

Overall

7353

Males

6438

M45-49

6438

HALF→25K

13.1 - 15.5 mi

Top 23%
×4
+66ft-88ft

Overall

6643

Males

5847

M45-49

5847

25K→30K

15.5 - 18.6 mi

Top 19%
×9
+181ft-148ft

Overall

5597

Males

5007

M45-49

5007

30K→20M

18.6 - 20.0 mi

Top 29%
×5
+64ft-50ft

Overall

8383

Males

6711

M45-49

6711

20M→21M

20.0 - 21.0 mi

Top 38%
×8
+106ft-24ft

Overall

11158

Males

8051

M45-49

8051

21M→35K

21.0 - 21.8 mi

Top 38%
×7
+17ft-86ft

Overall

11052

Males

7980

M45-49

7980

35K→23M

21.8 - 23.0 mi

Top 65%
×5
+23ft-63ft

Overall

18816

Males

11363

M45-49

11363

23M→24M

23.0 - 24.0 mi

Top 66%
×6
+12ft-82ft

Overall

19281

Males

11544

M45-49

11544

24M→40K

24.0 - 24.9 mi

Top 64%
×1
+6ft-20ft

Overall

18498

Males

11109

M45-49

11109

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1
+13ft-16ft

Overall

26091

Males

14828

M45-49

14828

25.2M→FINISH

25.2 - 26.2 mi

Top 81%
×2
+22ft-21ft

Overall

23531

Males

13550

M45-49

13550

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1475*
Passed By
1775
Net Change
-2436
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7991
5K → 10K134200-187#7991#8178
10K → 15K171101+70#8178#8108
15K → 20K280*32+248#8108#7860
20K → HALF4013+27#7860#7833
HALF → 25K282*12+270#7833#7563
25K → 30K404*11+393#7563#7170
30K → 20M5497-43#7170#7213
20M → 21M38185-147#7213#7360
21M → 35K22124-102#7360#7462
35K → 23M23200-635#7462#8097
23M → 24M8200-544#8097#8641
24M → 40K11200-365#8641#9006
40K → 25.2M3200-536#9006#9542
25.2M → FINISH5200-885#9542#10427
TOTALS1475*1775-2436

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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