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BOSTON MARATHON 2026

Sam Blom

Bib: 8539•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 43%
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Top 46%
Age Group (M55-59)
#0 / 1491
Top 34%
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
24:11
3.11 mi
Rank: #15256
Start → 5K
24:11 | 7:48/mi
10K
48:40
6.21 mi
Rank: #15753 (-497)
5K → 10K
24:29 | 7:53/mi
15K
1:12:48
9.32 mi
Rank: #15503 (+250)
10K → 15K
24:08 | 7:47/mi
20K
1:36:54
12.43 mi
Rank: #15141 (+362)
15K → 20K
24:06 | 7:46/mi
HALF
1:42:00
13.11 mi
Rank: #15011 (+130)
20K → HALF
5:06 | 7:29/mi
25K
2:00:46
15.53 mi
Rank: #14712 (+299)
HALF → 25K
18:46 | 7:45/mi
30K
2:24:44
18.64 mi
Rank: #14044 (+668)
25K → 30K
23:58 | 7:43/mi
20M
2:35:18
20.00 mi
Rank: #13792 (+252)
30K → 20M
10:34 | 7:47/mi
21M
2:43:12
21.00 mi
Rank: #13514 (+278)
20M → 21M
7:54 | 7:54/mi
35K
2:48:44
21.75 mi
Rank: #13363 (+151)
21M → 35K
5:32 | 7:24/mi
23M
2:58:23
23.00 mi
Rank: #13164 (+199)
35K → 23M
9:39 | 7:43/mi
24M
3:05:47
24.00 mi
Rank: #12995 (+169)
23M → 24M
7:24 | 7:24/mi
40K
3:12:12
24.85 mi
Rank: #12816 (+179)
24M → 40K
6:25 | 7:31/mi
25.2M
3:14:52
25.20 mi
Rank: #12691 (+125)
40K → 25.2M
2:40 | 7:44/mi
FINISH
3:22:18
26.22 mi
Rank: #12562 (+129)
25.2M → FINISH
7:26 | 7:18/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time1:42:00
Pace7:47 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:40:18
Pace7:40 /mi
📊Negative Split: 1.7% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:39:2224:117:4824:11
7:48
-
10K
6.21 mi11:03:5148:407:5024:29
7:53
+0:05
15K
9.32 mi11:27:591:12:487:4924:08
7:47
-0:06
20K
12.43 mi11:52:051:36:547:4824:06
7:46
-0:01
HALF
13.11 mi11:57:111:42:007:475:06
7:29
-0:17
25K
15.53 mi12:15:572:00:467:4718:46
7:45
+0:16
30K
18.64 mi12:39:552:24:447:4623:58
7:43
-0:02
20M
20.00 mi12:50:292:35:187:4610:34
7:47
+0:04
21M
21.00 mi12:58:232:43:127:477:54
7:54
+0:07
35K
21.75 mi13:03:552:48:447:465:32
7:24
-0:30
23M
23.00 mi13:13:342:58:237:469:39
7:43
+0:19
24M
24.00 mi13:20:583:05:477:457:24
7:24
-0:19
40K
24.85 mi13:27:233:12:127:446:25
7:31
+0:07
25.2M
25.20 mi13:30:033:14:527:442:40
7:44
+0:13
FINISH
26.22 mi13:37:293:22:187:447:26
7:18
-0:26

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

7:18 /mi

Average Pace

7:43 /mi

Slowest Pace

7:54 /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

31:53

16% of race

Time at Steady Pace

2:50:25

84% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:43 /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 mi10:39:2224:117:4824:11
7:48
#15256
10K
6.21 mi11:03:5148:407:5024:29
7:53
#15753
15K
9.32 mi11:27:591:12:487:4924:08
7:47
#15503
20K
12.43 mi11:52:051:36:547:4824:06
7:46
#15141
HALF
13.11 mi11:57:111:42:007:475:06
7:29
#15011
25K
15.53 mi12:15:572:00:467:4718:46
7:45
#14712
30K
18.64 mi12:39:552:24:447:4623:58
7:43
#14044
20M
20.00 mi12:50:292:35:187:4610:34
7:47
#13792
21M
21.00 mi12:58:232:43:127:477:54
7:54
#13514
35K
21.75 mi13:03:552:48:447:465:32
7:24
#13363
23M
23.00 mi13:13:342:58:237:469:39
7:43
#13164
24M
24.00 mi13:20:583:05:477:457:24
7:24
#12995
40K
24.85 mi13:27:233:12:127:446:25
7:31
#12816
25.2M
25.20 mi13:30:033:14:527:442:40
7:44
#12691
FINISH
26.22 mi13:37:293:22:187:447:26
7:18
#12562
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15256103441034415058(Top 52%)10211(Top 62%)10211(Top 685%)
10K6.21 mi3.10 mi15753-49710510-16610510-16616282(Top 56%)10722(Top 66%)10722(Top 719%)
15K9.32 mi3.11 mi15503+25010387+12310387+12315058(Top 52%)10211(Top 62%)10211(Top 685%)
20K12.43 mi3.11 mi15141+36210241+14610241+14614176(Top 49%)9806(Top 60%)9806(Top 658%)
HALF13.11 mi0.68 mi15011+13010197+4410197+4412765(Top 44%)9234(Top 57%)9234(Top 619%)
25K15.53 mi2.42 mi14712+29910067+13010067+13013328(Top 46%)9356(Top 57%)9356(Top 627%)
30K18.64 mi3.11 mi14044+6689767+3009767+30011335(Top 39%)8354(Top 51%)8354(Top 560%)
20M20.00 mi1.36 mi13792+2529634+1339634+13311140(Top 38%)8129(Top 50%)8129(Top 545%)
21M21.00 mi1.00 mi13514+2789489+1459489+1459161(Top 32%)7014(Top 43%)7014(Top 470%)
35K21.75 mi0.75 mi13363+1519400+899400+899990(Top 34%)7448(Top 46%)7448(Top 500%)
23M23.00 mi1.25 mi13164+1999292+1089292+10810337(Top 36%)7522(Top 46%)7522(Top 504%)
24M24.00 mi1.00 mi12995+1699201+919201+919282(Top 32%)6917(Top 42%)6917(Top 464%)
40K24.85 mi0.85 mi12816+1799094+1079094+1078820(Top 30%)6587(Top 40%)6587(Top 442%)
25.2M25.20 mi0.35 mi12691+1259028+669028+666491(Top 22%)5205(Top 32%)5205(Top 349%)
FINISH26.22 mi1.02 mi12562+1298944+848944+849784(Top 34%)6989(Top 43%)6989(Top 469%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21
+97ft-345ft

Overall

15058

Males

10211

M55-59

10211

5K→10K

3.1 - 6.2 mi

Top 56%
×5
+79ft-138ft

Overall

16282

Males

10722

M55-59

10722

10K→15K

6.2 - 9.3 mi

Top 52%
×3
+67ft-78ft

Overall

15058

Males

10211

M55-59

10211

15K→20K

9.3 - 12.4 mi

Top 49%
×5
+106ft-86ft

Overall

14176

Males

9806

M55-59

9806

20K→HALF

12.4 - 13.1 mi

Top 44%
×2
+19ft-37ft

Overall

12765

Males

9234

M55-59

9234

HALF→25K

13.1 - 15.5 mi

Top 46%
×4
+66ft-88ft

Overall

13328

Males

9356

M55-59

9356

25K→30K

15.5 - 18.6 mi

Top 39%
×9
+181ft-148ft

Overall

11335

Males

8354

M55-59

8354

30K→20M

18.6 - 20.0 mi

Top 38%
×5
+64ft-50ft

Overall

11140

Males

8129

M55-59

8129

20M→21M

20.0 - 21.0 mi

Top 32%
×8
+106ft-24ft

Overall

9161

Males

7014

M55-59

7014

21M→35K

21.0 - 21.8 mi

Top 34%
×7
+17ft-86ft

Overall

9990

Males

7448

M55-59

7448

35K→23M

21.8 - 23.0 mi

Top 36%
×5
+23ft-63ft

Overall

10337

Males

7522

M55-59

7522

23M→24M

23.0 - 24.0 mi

Top 32%
×6
+12ft-82ft

Overall

9282

Males

6917

M55-59

6917

24M→40K

24.0 - 24.9 mi

Top 30%
×1
+6ft-20ft

Overall

8820

Males

6587

M55-59

6587

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1
+13ft-16ft

Overall

6491

Males

5205

M55-59

5205

25.2M→FINISH

25.2 - 26.2 mi

Top 34%
×2
+22ft-21ft

Overall

9784

Males

6989

M55-59

6989

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3535*
Passed By
410
Net Change
+2694
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15256
5K → 10K134200-497#15256#15753
10K → 15K341*91+250#15753#15503
15K → 20K402*40+362#15503#15141
20K → HALF1344+130#15141#15011
HALF → 25K323*24+299#15011#14712
25K → 30K675*7+668#14712#14044
30K → 20M260*8+252#14044#13792
20M → 21M279*1+278#13792#13514
21M → 35K1554+151#13514#13363
35K → 23M210*11+199#13363#13164
23M → 24M1745+169#13164#12995
24M → 40K1790+179#12995#12816
40K → 25.2M1250+125#12816#12691
25.2M → FINISH14415+129#12691#12562
TOTALS3535*410+2694

* 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