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BOSTON MARATHON 2025

Leo Tchong

Bib: 26426•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:01
Rank: #19158
Start → 5K
26:01 | 8:22/mi
10K· 6.21 mi
53:45
Rank: #20655 (-1497)
5K → 10K
27:44 | 8:56/mi
15K· 9.32 mi
1:22:24
Rank: #21484 (-829)
10K → 15K
28:39 | 9:13/mi
20K· 12.43 mi
1:52:34
Rank: #22195 (-711)
15K → 20K
30:10 | 9:43/mi
Half· 13.11 mi
1:59:08
Rank: #22295 (-100)
20K → Half
6:34 | 9:37/mi
25K· 15.53 mi
2:24:15
Rank: #22740 (-445)
Half → 25K
25:07 | 10:22/mi
30K· 18.64 mi
2:58:52
Rank: #23075 (-335)
25K → 30K
34:37 | 11:09/mi
20M
3:13:31
Rank: #23078 (-3)
30K → 20M
14:39 | 10:47/mi
21M
3:24:30
Rank: #22972 (+106)
20M → 21M
10:59 | 10:59/mi
35K· 21.75 mi
3:31:42
Rank: #22895 (+77)
21M → 35K
7:12 | 9:37/mi
23M
3:44:29
Rank: #22786 (+109)
35K → 23M
12:47 | 10:13/mi
24M
3:54:23
Rank: #22679 (+107)
23M → 24M
9:54 | 9:54/mi
40K· 24.85 mi
4:03:20
Rank: #22644 (+35)
24M → 40K
8:57 | 10:28/mi
25.2M
4:07:07
Rank: #22613 (+31)
40K → 25.2M
3:47 | 10:58/mi
Finish· 26.22 mi
4:16:16
Rank: #22503 (+110)
25.2M → Finish
9:09 | 8:59/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:08
Pace9:05 /mi
2nd Half
Distance13.11 mi
Time2:17:08
Pace10:28 /mi
📊Positive Split: 15.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:0826:018:2226:01
8:22
-
10K
6.21 mi12:08:5253:458:3927:44
8:56
+0:34
15K
9.32 mi12:37:311:22:248:5028:39
9:13
+0:17
20K
12.43 mi13:07:411:52:349:0330:10
9:43
+0:30
Half
13.11 mi13:14:151:59:089:056:34
9:37
-0:06
25K
15.53 mi13:39:222:24:159:1725:07
10:22
+0:45
30K
18.64 mi14:13:592:58:529:3634:37
11:09
+0:47
20M
20.00 mi14:28:383:13:319:4114:39
10:47
-0:22
21M
21.00 mi14:39:373:24:309:4410:59
10:59
+0:12
35K
21.75 mi14:46:493:31:429:447:12
9:37
-1:22
23M
23.00 mi14:59:363:44:299:4612:47
10:13
+0:36
24M
24.00 mi15:09:303:54:239:469:54
9:54
-0:19
40K
24.85 mi15:18:274:03:209:478:57
10:28
+0:34
25.2M
25.20 mi15:22:144:07:079:483:47
10:58
+0:30
Finish
26.22 mi15:31:234:16:169:479:09
8:59
-1:59

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

8:22 /mi

Average Pace

9:47 /mi

Slowest Pace

11:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:33

36% of race

Time at Steady Pace

1:06:37

26% of race

Time at Slower Pace

1:38:06

38% of race

Average Pace: 9:46 /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 mi11:41:0826:018:2226:01
8:22
#19158
10K
6.21 mi12:08:5253:458:3927:44
8:56
#20655
15K
9.32 mi12:37:311:22:248:5028:39
9:13
#21484
20K
12.43 mi13:07:411:52:349:0330:10
9:43
#22195
Half
13.11 mi13:14:151:59:089:056:34
9:37
#22295
25K
15.53 mi13:39:222:24:159:1725:07
10:22
#22740
30K
18.64 mi14:13:592:58:529:3634:37
11:09
#23075
20M
20.00 mi14:28:383:13:319:4114:39
10:47
#23078
21M
21.00 mi14:39:373:24:309:4410:59
10:59
#22972
35K
21.75 mi14:46:493:31:429:447:12
9:37
#22895
23M
23.00 mi14:59:363:44:299:4612:47
10:13
#22786
24M
24.00 mi15:09:303:54:239:469:54
9:54
#22679
40K
24.85 mi15:18:274:03:209:478:57
10:28
#22644
25.2M
25.20 mi15:22:144:07:079:483:47
10:58
#22613
Finish
26.22 mi15:31:234:16:169:479:09
8:59
#22503
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi19158121091210922926(Top 81%)13802(Top 86%)13802(Top 691%)
10K6.21 mi3.10 mi20655-149712733-62412733-62422064(Top 78%)13372(Top 83%)13372(Top 670%)
15K9.32 mi3.11 mi21484-82913131-39813131-39822926(Top 81%)13802(Top 86%)13802(Top 691%)
20K12.43 mi3.11 mi22195-71113435-30413435-30423515(Top 83%)14022(Top 87%)14022(Top 703%)
Half13.11 mi0.68 mi22295-10013471-3613471-3623891(Top 84%)14181(Top 88%)14181(Top 710%)
25K15.53 mi2.42 mi22740-44513682-21113682-21124087(Top 85%)14234(Top 88%)14234(Top 713%)
30K18.64 mi3.11 mi23075-33513788-10613788-10624278(Top 85%)14202(Top 88%)14202(Top 712%)
20M20.00 mi1.36 mi23078-313760+2813760+2823130(Top 81%)13587(Top 84%)13587(Top 681%)
21M21.00 mi1.00 mi22972+10613699+6113699+6121342(Top 75%)12671(Top 79%)12671(Top 635%)
35K21.75 mi0.75 mi22895+7713651+4813651+4820766(Top 73%)12342(Top 77%)12342(Top 618%)
23M23.00 mi1.25 mi22786+10913578+7313578+7321145(Top 74%)12467(Top 77%)12467(Top 625%)
24M24.00 mi1.00 mi22679+10713504+7413504+7421063(Top 74%)12379(Top 77%)12379(Top 620%)
40K24.85 mi0.85 mi22644+3513473+3113473+3121827(Top 77%)12668(Top 79%)12668(Top 635%)
25.2M25.20 mi0.35 mi22613+3113448+2513448+2520521(Top 72%)12054(Top 75%)12054(Top 604%)
Finish26.22 mi1.02 mi22503+11013380+6813380+6818928(Top 67%)11328(Top 70%)11328(Top 568%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

22926

Males

13802

M50-54

13802

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

22064

Males

13372

M50-54

13372

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

22926

Males

13802

M50-54

13802

15K→20K

9.3 - 12.4 mi

Top 83%
×5stories
+106ft-86ft

Overall

23515

Males

14022

M50-54

14022

20K→Half

12.4 - 13.1 mi

Top 84%
×2stories
+19ft-37ft

Overall

23891

Males

14181

M50-54

14181

Half→25K

13.1 - 15.5 mi

Top 85%
×4stories
+66ft-88ft

Overall

24087

Males

14234

M50-54

14234

25K→30K

15.5 - 18.6 mi

Top 85%
×9stories
+181ft-148ft

Overall

24278

Males

14202

M50-54

14202

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

23130

Males

13587

M50-54

13587

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21342

Males

12671

M50-54

12671

21M→35K

21.0 - 21.8 mi

Top 73%
×7stories
+17ft-86ft

Overall

20766

Males

12342

M50-54

12342

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

21145

Males

12467

M50-54

12467

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

21063

Males

12379

M50-54

12379

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21827

Males

12668

M50-54

12668

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20521

Males

12054

M50-54

12054

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

18928

Males

11328

M50-54

11328

Passing Analysis

Category:
Athletes Passed
999
Passed By
4344
Net Change
-3345
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19158
5K → 10K171514-1497#19158#20655
10K → 15K49878-829#20655#21484
15K → 20K58769-711#21484#22195
20K → Half10110-100#22195#22295
Half → 25K49494-445#22295#22740
25K → 30K69404-335#22740#23075
30K → 20M7780-3#23075#23078
20M → 21M13024+106#23078#22972
21M → 35K869+77#22972#22895
35K → 23M12314+109#22895#22786
23M → 24M11710+107#22786#22679
24M → 40K6126+35#22679#22644
40K → 25.2M365+31#22644#22613
25.2M → Finish1177+110#22613#22503
TOTALS9994344-3345
📊

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