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BOSTON MARATHON 2023

Brock Leiendecker

Bib: 24894•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
35:12
Rank: #26066
Start → 5K
35:12 | 11:20/mi
10K· 6.21 mi
1:10:21
Rank: #25944 (+122)
5K → 10K
35:09 | 11:19/mi
15K· 9.32 mi
1:45:39
Rank: #25831 (+113)
10K → 15K
35:18 | 11:22/mi
20K· 12.43 mi
2:22:43
Rank: #25779 (+52)
15K → 20K
37:04 | 11:56/mi
Half· 13.11 mi
2:30:30
Rank: #25754 (+25)
20K → Half
7:47 | 11:24/mi
25K· 15.53 mi
2:58:21
Rank: #25587 (+167)
Half → 25K
27:51 | 11:29/mi
30K· 18.64 mi
3:43:17
Rank: #25772 (-185)
25K → 30K
44:56 | 14:28/mi
20M
4:08:22
Rank: #26010 (-238)
30K → 20M
25:05 | 18:27/mi
21M
4:23:38
Rank: #26012 (-2)
20M → 21M
15:16 | 15:16/mi
35K· 21.75 mi
4:31:55
Rank: #25955 (+57)
21M → 35K
8:17 | 11:04/mi
23M
4:48:27
Rank: #25930 (+25)
35K → 23M
16:32 | 13:12/mi
24M
5:00:59
Rank: #25905 (+25)
23M → 24M
12:32 | 12:32/mi
40K· 24.85 mi
5:11:40
Rank: #25875 (+30)
24M → 40K
10:41 | 12:30/mi
25.2M
5:17:28
Rank: #25890 (-15)
40K → 25.2M
5:48 | 16:49/mi
Finish· 26.22 mi
5:28:33
Rank: #25842 (+48)
25.2M → Finish
11:05 | 10:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:30:30
Pace11:29 /mi
2nd Half
Distance13.11 mi
Time2:58:03
Pace13:35 /mi
📊Positive Split: 18.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:1335:1211:2035:12
11:20
-
10K
6.21 mi12:32:221:10:2111:1935:09
11:19
-0:01
15K
9.32 mi13:07:401:45:3911:2035:18
11:22
+0:03
20K
12.43 mi13:44:442:22:4311:2937:04
11:56
+0:34
Half
13.11 mi13:52:312:30:3011:297:47
11:24
-0:32
25K
15.53 mi14:20:222:58:2111:2927:51
11:29
+0:05
30K
18.64 mi15:05:183:43:1711:5944:56
14:28
+2:59
20M
20.00 mi15:30:234:08:2212:2525:05
18:27
+3:59
21M
21.00 mi15:45:394:23:3812:3315:16
15:16
-3:11
35K
21.75 mi15:53:564:31:5512:308:17
11:04
-4:12
23M
23.00 mi16:10:284:48:2712:3216:32
13:12
+2:08
24M
24.00 mi16:23:005:00:5912:3212:32
12:32
-0:40
40K
24.85 mi16:33:415:11:4012:3210:41
12:30
-0:02
25.2M
25.20 mi16:39:295:17:2812:365:48
16:49
+4:19
Finish
26.22 mi16:50:345:28:3312:3211:05
10:53
-5:56

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

10:53 /mi

Average Pace

12:32 /mi

Slowest Pace

18:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:40:56

67% of race

Time at Slower Pace

1:47:37

33% of race

Average Pace: 12:32 /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 mi11:57:1335:1211:2035:12
11:20
#26066
10K
6.21 mi12:32:221:10:2111:1935:09
11:19
#25944
15K
9.32 mi13:07:401:45:3911:2035:18
11:22
#25831
20K
12.43 mi13:44:442:22:4311:2937:04
11:56
#25779
Half
13.11 mi13:52:312:30:3011:297:47
11:24
#25754
25K
15.53 mi14:20:222:58:2111:2927:51
11:29
#25587
30K
18.64 mi15:05:183:43:1711:5944:56
14:28
#25772
20M
20.00 mi15:30:234:08:2212:2525:05
18:27
#26010
21M
21.00 mi15:45:394:23:3812:3315:16
15:16
#26012
35K
21.75 mi15:53:564:31:5512:308:17
11:04
#25955
23M
23.00 mi16:10:284:48:2712:3216:32
13:12
#25930
24M
24.00 mi16:23:005:00:5912:3212:32
12:32
#25905
40K
24.85 mi16:33:415:11:4012:3210:41
12:30
#25875
25.2M
25.20 mi16:39:295:17:2812:365:48
16:49
#25890
Finish
26.22 mi16:50:345:28:3312:3211:05
10:53
#25842
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26066149511495125566(Top 96%)14756(Top 97%)14756(Top 279%)
10K6.21 mi3.10 mi25944+12214915+3614915+3625806(Top 97%)14867(Top 98%)14867(Top 281%)
15K9.32 mi3.11 mi25831+11314878+3714878+3725566(Top 96%)14756(Top 97%)14756(Top 279%)
20K12.43 mi3.11 mi25779+5214842+3614842+3625610(Top 96%)14754(Top 97%)14754(Top 279%)
Half13.11 mi0.68 mi25754+2514826+1614826+1625392(Top 95%)14649(Top 97%)14649(Top 277%)
25K15.53 mi2.42 mi25587+16714758+6814758+6824645(Top 93%)14316(Top 94%)14316(Top 271%)
30K18.64 mi3.11 mi25772-18514829-7114829-7126226(Top 99%)14989(Top 99%)14989(Top 284%)
20M20.00 mi1.36 mi26010-23814929-10014929-10026597(Top 100%)15159(Top 100%)15159(Top 287%)
21M21.00 mi1.00 mi26012-214926+314926+325880(Top 97%)14817(Top 98%)14817(Top 280%)
35K21.75 mi0.75 mi25955+5714895+3114895+3123433(Top 88%)13580(Top 89%)13580(Top 257%)
23M23.00 mi1.25 mi25930+2514882+1314882+1325276(Top 95%)14476(Top 95%)14476(Top 274%)
24M24.00 mi1.00 mi25905+2514868+1414868+1425084(Top 94%)14334(Top 94%)14334(Top 271%)
40K24.85 mi0.85 mi25875+3014855+1314855+1324437(Top 92%)14007(Top 92%)14007(Top 265%)
25.2M25.20 mi0.35 mi25890-1514860-514860-526333(Top 99%)14989(Top 99%)14989(Top 284%)
Finish26.22 mi1.02 mi25842+4814831+2914831+2923746(Top 89%)13701(Top 90%)13701(Top 259%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21stories
+97ft-345ft

Overall

25566

Males

14756

M18-39

14756

5K→10K

3.1 - 6.2 mi

Top 97%
×5stories
+79ft-138ft

Overall

25806

Males

14867

M18-39

14867

10K→15K

6.2 - 9.3 mi

Top 96%
×3stories
+67ft-78ft

Overall

25566

Males

14756

M18-39

14756

15K→20K

9.3 - 12.4 mi

Top 96%
×5stories
+106ft-86ft

Overall

25610

Males

14754

M18-39

14754

20K→Half

12.4 - 13.1 mi

Top 95%
×2stories
+19ft-37ft

Overall

25392

Males

14649

M18-39

14649

Half→25K

13.1 - 15.5 mi

Top 93%
×4stories
+66ft-88ft

Overall

24645

Males

14316

M18-39

14316

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

26226

Males

14989

M18-39

14989

30K→20M

18.6 - 20.0 mi

Top 100%
×5stories
+64ft-50ft

Overall

26597

Males

15159

M18-39

15159

20M→21M

20.0 - 21.0 mi

Top 97%
×8stories
+106ft-24ft

Overall

25880

Males

14817

M18-39

14817

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

23433

Males

13580

M18-39

13580

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

25276

Males

14476

M18-39

14476

23M→24M

23.0 - 24.0 mi

Top 94%
×6stories
+12ft-82ft

Overall

25084

Males

14334

M18-39

14334

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24437

Males

14007

M18-39

14007

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

26333

Males

14989

M18-39

14989

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23746

Males

13701

M18-39

13701

Passing Analysis

Category:
Athletes Passed
840
Passed By
616
Net Change
+224
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26066
5K → 10K17149+122#26066#25944
10K → 15K13926+113#25944#25831
15K → 20K9947+52#25831#25779
20K → Half305+25#25779#25754
Half → 25K1681+167#25754#25587
25K → 30K17202-185#25587#25772
30K → 20M1239-238#25772#26010
20M → 21M1315-2#26010#26012
21M → 35K570+57#26012#25955
35K → 23M316+25#25955#25930
23M → 24M283+25#25930#25905
24M → 40K366+30#25905#25875
40K → 25.2M015-15#25875#25890
25.2M → Finish502+48#25890#25842
TOTALS840616+224
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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