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BOSTON MARATHON 2023

Simon Rennocks

OH

Bib: 15421 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 35%
Gender (Male)
#0 / 15176
Top 50%
Masters (Masters Men)
#0 / 9891
Top 39%
Division (M55-59)
#0 / 1422
Top 20%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:31/mi
23:22
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:22/mi
46:15
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:22/mi
1:09:09
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:32/mi
1:32:33
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:29/mi
1:37:39
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:33/mi
1:55:58
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:50/mi
2:20:17
↑ 181↓ 1480.2%
138 ft elev
20M
7:41/mi
2:30:44
↑ 64↓ 500.2%
148 ft elev
21M
8:32/mi
2:39:16
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:37/mi
2:44:58
↑ 17↓ 861.7%
156 ft elev
23M
8:08/mi
2:55:09
↑ 23↓ 630.6%
116 ft elev
24M
7:59/mi
3:03:08
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:54/mi
3:09:53
↓ 200.3%
20 ft elev
25.2M
8:56/mi
3:12:58
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:43/mi
3:20:50
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:37:397:27 /mi⚡ faster
2nd Half
1:43:117:52 /mi+5.7%
Positive split — 5.7% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4923:227:3123:22
7:31
-
10K
6.21 mi11:15:4246:157:2722:53
7:22
-0:09
15K
9.32 mi11:38:361:09:097:2522:54
7:22
0:00
20K
12.43 mi12:02:001:32:337:2723:24
7:32
+0:10
Half
13.11 mi12:07:061:37:397:275:06
7:29
-0:03
25K
15.53 mi12:25:251:55:587:2818:19
7:33
+0:04
30K
18.64 mi12:49:442:20:177:3224:19
7:50
+0:17
20M
20.00 mi13:00:112:30:447:3210:27
7:41
-0:09
21M
21.00 mi13:08:432:39:167:358:32
8:32
+0:51
35K
21.75 mi13:14:252:44:587:355:42
7:37
-0:55
23M
23.00 mi13:24:362:55:097:3710:11
8:08
+0:31
24M
24.00 mi13:32:353:03:087:387:59
7:59
-0:09
40K
24.85 mi13:39:203:09:537:386:45
7:54
-0:05
25.2M
25.20 mi13:42:253:12:587:393:05
8:56
+1:02
Finish
26.22 mi13:50:173:20:507:407:52
7:43
-1:13

Checkpoints & Pacing

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

7:22 /mi

Average Pace

7:40 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

45:47

23% of race

Time at Steady Pace

1:58:31

59% of race

Time at Slower Pace

36:32

18% of race

Average Pace: 7:40 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:52:4923:227:3123:22
7:31
#9790
10K
6.21 mi11:15:4246:157:2722:53
7:22
#9524
15K
9.32 mi11:38:361:09:097:2522:54
7:22
#9345
20K
12.43 mi12:02:001:32:337:2723:24
7:32
#9391
Half
13.11 mi12:07:061:37:397:275:06
7:29
#9416
25K
15.53 mi12:25:251:55:587:2818:19
7:33
#9350
30K
18.64 mi12:49:442:20:177:3224:19
7:50
#9358
20M
20.00 mi13:00:112:30:447:3210:27
7:41
#9248
21M
21.00 mi13:08:432:39:167:358:32
8:32
#9293
35K
21.75 mi13:14:252:44:587:355:42
7:37
#9283
23M
23.00 mi13:24:362:55:097:3710:11
8:08
#9322
24M
24.00 mi13:32:353:03:087:387:59
7:59
#9391
40K
24.85 mi13:39:203:09:537:386:45
7:54
#9370
25.2M
25.20 mi13:42:253:12:587:393:05
8:56
#9398
Finish
26.22 mi13:50:173:20:507:407:52
7:43
#9412
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi979080258025909675997599
10K6.21 mi3.10 mi9524+2667889+1367889+136934877727772
15K9.32 mi3.11 mi9345+1797775+1147775+114909675997599
20K12.43 mi3.11 mi9391-467790-157790-15955078277827
Half13.11 mi0.68 mi9416-257802-127802-12996280728072
25K15.53 mi2.42 mi9350+667754+487754+48918375457545
30K18.64 mi3.11 mi9358-87715+397715+39955775997599
20M20.00 mi1.36 mi9248+1107622+937622+93810366636663
21M21.00 mi1.00 mi9293-457629-77629-71065079307930
35K21.75 mi0.75 mi9283+107608+217608+21937772827282
23M23.00 mi1.25 mi9322-397607+17607+11067678007800
24M24.00 mi1.00 mi9391-697619-127619-121108879307930
40K24.85 mi0.85 mi9370+217582+377582+37927969656965
25.2M25.20 mi0.35 mi9398-287584-27584-21209082848284
Finish26.22 mi1.02 mi9412-147576+87576+81007173257325

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9096

Males

7599

M55-59

7599

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9348

Males

7772

M55-59

7772

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9096

Males

7599

M55-59

7599

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

9550

Males

7827

M55-59

7827

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

9962

Males

8072

M55-59

8072

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9183

Males

7545

M55-59

7545

25K→30K

15.5 - 18.6 mi

Top 36%
×9story building
+181ft-148ft

Overall

9557

Males

7599

M55-59

7599

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8103

Males

6663

M55-59

6663

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

10650

Males

7930

M55-59

7930

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9377

Males

7282

M55-59

7282

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10676

Males

7800

M55-59

7800

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11088

Males

7930

M55-59

7930

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9279

Males

6965

M55-59

6965

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12090

Males

8284

M55-59

8284

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10071

Males

7325

M55-59

7325

Passing Analysis

Category:
Athletes Passed
1677*
Passed By
1299
Net Change
+378
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9790
5K → 10K454188+266#9790#9524
10K → 15K25576+179#9524#9345
15K → 20K119165-46#9345#9391
20K → Half1540-25#9391#9416
Half → 25K14882+66#9416#9350
25K → 30K169*177-8#9350#9358
30K → 20M13525+110#9358#9248
20M → 21M74119-45#9248#9293
21M → 35K5040+10#9293#9283
35K → 23M69108-39#9283#9322
23M → 24M46115-69#9322#9391
24M → 40K7554+21#9391#9370
40K → 25.2M2048-28#9370#9398
25.2M → Finish4862-14#9398#9412
TOTALS1677*1299+378

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

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing