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BOSTON MARATHON 2026

Randy Sheffield

Bib: 12821•M

MS

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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
22:13
3.11 mi
Rank: #9747
Start → 5K
22:13 | 7:10/mi
10K
44:19
6.21 mi
Rank: #9590 (+157)
5K → 10K
22:06 | 7:07/mi
15K
1:08:14
9.32 mi
Rank: #11208 (-1618)
10K → 15K
23:55 | 7:42/mi
20K
1:33:10
12.43 mi
Rank: #12566 (-1358)
15K → 20K
24:56 | 8:02/mi
HALF
1:38:26
13.11 mi
Rank: #12683 (-117)
20K → HALF
5:16 | 7:44/mi
25K
1:57:45
15.53 mi
Rank: #13091 (-408)
HALF → 25K
19:19 | 7:58/mi
30K
2:27:30
18.64 mi
Rank: #15297 (-2206)
25K → 30K
29:45 | 9:35/mi
20M
2:45:53
20.00 mi
Rank: #17762 (-2465)
30K → 20M
18:23 | 13:33/mi
21M
2:58:04
21.00 mi
Rank: #18536 (-774)
20M → 21M
12:11 | 12:11/mi
35K
3:04:43
21.75 mi
Rank: #18578 (-42)
21M → 35K
6:39 | 8:54/mi
23M
3:16:41
23.00 mi
Rank: #18744 (-166)
35K → 23M
11:58 | 9:34/mi
24M
3:26:22
24.00 mi
Rank: #18938 (-194)
23M → 24M
9:41 | 9:41/mi
40K
3:34:43
24.85 mi
Rank: #19074 (-136)
24M → 40K
8:21 | 9:46/mi
25.2M
3:37:57
25.20 mi
Rank: #19032 (+42)
40K → 25.2M
3:14 | 9:23/mi
FINISH
3:46:11
26.22 mi
Rank: #18892 (+140)
25.2M → FINISH
8:14 | 8:05/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:38:26
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time2:07:45
Pace9:45 /mi
📊Positive Split: 29.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3122:137:1022:13
7:10
-
10K
6.21 mi11:12:3744:197:0822:06
7:07
-0:03
15K
9.32 mi11:36:321:08:147:2023:55
7:42
+0:35
20K
12.43 mi12:01:281:33:107:3024:56
8:02
+0:20
HALF
13.11 mi12:06:441:38:267:315:16
7:44
-0:18
25K
15.53 mi12:26:031:57:457:3519:19
7:58
+0:14
30K
18.64 mi12:55:482:27:307:5529:45
9:35
+1:37
20M
20.00 mi13:14:112:45:538:1818:23
13:33
+3:58
21M
21.00 mi13:26:222:58:048:2912:11
12:11
-1:22
35K
21.75 mi13:33:013:04:438:306:39
8:54
-3:17
23M
23.00 mi13:44:593:16:418:3411:58
9:34
+0:40
24M
24.00 mi13:54:403:26:228:369:41
9:41
+0:07
40K
24.85 mi14:03:013:34:438:398:21
9:46
+0:05
25.2M
25.20 mi14:06:153:37:578:393:14
9:23
-0:23
FINISH
26.22 mi14:14:293:46:118:388:14
8:05
-1:18

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

7:07 /mi

Average Pace

8:38 /mi

Slowest Pace

13:33 /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

1:32:49

41% of race

Time at Steady Pace

1:42:48

45% of race

Time at Slower Pace

30:34

14% of race

Average Pace: 8:38 /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 mi10:50:3122:137:1022:13
7:10
#9747
10K
6.21 mi11:12:3744:197:0822:06
7:07
#9590
15K
9.32 mi11:36:321:08:147:2023:55
7:42
#11208
20K
12.43 mi12:01:281:33:107:3024:56
8:02
#12566
HALF
13.11 mi12:06:441:38:267:315:16
7:44
#12683
25K
15.53 mi12:26:031:57:457:3519:19
7:58
#13091
30K
18.64 mi12:55:482:27:307:5529:45
9:35
#15297
20M
20.00 mi13:14:112:45:538:1818:23
13:33
#17762
21M
21.00 mi13:26:222:58:048:2912:11
12:11
#18536
35K
21.75 mi13:33:013:04:438:306:39
8:54
#18578
23M
23.00 mi13:44:593:16:418:3411:58
9:34
#18744
24M
24.00 mi13:54:403:26:228:369:41
9:41
#18938
40K
24.85 mi14:03:013:34:438:398:21
9:46
#19074
25.2M
25.20 mi14:06:153:37:578:393:14
9:23
#19032
FINISH
26.22 mi14:14:293:46:118:388:14
8:05
#18892
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 mi97477953795314523(Top 50%)10009(Top 61%)10009(Top 415%)
10K6.21 mi3.10 mi9590+1577875+787875+789501(Top 33%)7797(Top 48%)7797(Top 323%)
15K9.32 mi3.11 mi11208-16188626-7518626-75114523(Top 50%)10009(Top 61%)10009(Top 415%)
20K12.43 mi3.11 mi12566-13589208-5829208-58216287(Top 56%)10675(Top 65%)10675(Top 442%)
HALF13.11 mi0.68 mi12683-1179253-459253-4514928(Top 51%)10211(Top 62%)10211(Top 423%)
25K15.53 mi2.42 mi13091-4089388-1359388-13515139(Top 52%)10145(Top 62%)10145(Top 420%)
30K18.64 mi3.11 mi15297-220610249-86110249-86121875(Top 75%)13081(Top 80%)13081(Top 542%)
20M20.00 mi1.36 mi17762-246511274-102511274-102527812(Top 96%)15777(Top 97%)15777(Top 654%)
21M21.00 mi1.00 mi18536-77411585-31111585-31125327(Top 87%)14557(Top 89%)14557(Top 603%)
35K21.75 mi0.75 mi18578-4211595-1011595-1019542(Top 67%)11748(Top 72%)11748(Top 487%)
23M23.00 mi1.25 mi18744-16611632-3711632-3720778(Top 72%)12347(Top 76%)12347(Top 512%)
24M24.00 mi1.00 mi18938-19411703-7111703-7121919(Top 76%)12837(Top 79%)12837(Top 532%)
40K24.85 mi0.85 mi19074-13611737-3411737-3421228(Top 73%)12443(Top 76%)12443(Top 516%)
25.2M25.20 mi0.35 mi19032+4211712+2511712+2516701(Top 58%)10309(Top 63%)10309(Top 427%)
FINISH26.22 mi1.02 mi18892+14011648+6411648+6415675(Top 54%)9855(Top 60%)9855(Top 408%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21
+97ft-345ft

Overall

14523

Males

10009

M45-49

10009

5K→10K

3.1 - 6.2 mi

Top 33%
×5
+79ft-138ft

Overall

9501

Males

7797

M45-49

7797

10K→15K

6.2 - 9.3 mi

Top 50%
×3
+67ft-78ft

Overall

14523

Males

10009

M45-49

10009

15K→20K

9.3 - 12.4 mi

Top 56%
×5
+106ft-86ft

Overall

16287

Males

10675

M45-49

10675

20K→HALF

12.4 - 13.1 mi

Top 51%
×2
+19ft-37ft

Overall

14928

Males

10211

M45-49

10211

HALF→25K

13.1 - 15.5 mi

Top 52%
×4
+66ft-88ft

Overall

15139

Males

10145

M45-49

10145

25K→30K

15.5 - 18.6 mi

Top 75%
×9
+181ft-148ft

Overall

21875

Males

13081

M45-49

13081

30K→20M

18.6 - 20.0 mi

Top 96%
×5
+64ft-50ft

Overall

27812

Males

15777

M45-49

15777

20M→21M

20.0 - 21.0 mi

Top 87%
×8
+106ft-24ft

Overall

25327

Males

14557

M45-49

14557

21M→35K

21.0 - 21.8 mi

Top 67%
×7
+17ft-86ft

Overall

19542

Males

11748

M45-49

11748

35K→23M

21.8 - 23.0 mi

Top 72%
×5
+23ft-63ft

Overall

20778

Males

12347

M45-49

12347

23M→24M

23.0 - 24.0 mi

Top 76%
×6
+12ft-82ft

Overall

21919

Males

12837

M45-49

12837

24M→40K

24.0 - 24.9 mi

Top 73%
×1
+6ft-20ft

Overall

21228

Males

12443

M45-49

12443

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1
+13ft-16ft

Overall

16701

Males

10309

M45-49

10309

25.2M→FINISH

25.2 - 26.2 mi

Top 54%
×2
+22ft-21ft

Overall

15675

Males

9855

M45-49

9855

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
784*
Passed By
2167
Net Change
-9145
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9747
5K → 10K325*168+157#9747#9590
10K → 15K12200-1618#9590#11208
15K → 20K14200-1358#11208#12566
20K → HALF5122-117#12566#12683
HALF → 25K53200-408#12683#13091
25K → 30K14200-2206#13091#15297
30K → 20M0200-2465#15297#17762
20M → 21M6200-774#17762#18536
21M → 35K4890-42#18536#18578
35K → 23M51200-166#18578#18744
23M → 24M23200-194#18744#18938
24M → 40K27163-136#18938#19074
40K → 25.2M5210+42#19074#19032
25.2M → FINISH15414+140#19032#18892
TOTALS784*2167-9145

* 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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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