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BOSTON MARATHON 2025

Kai Ho Leung

Bib: 6615•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
Masters (Masters Men)
#0 / 10463
Top 36%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:42/mi
20:50
↑ 97↓ 3451.5%
10K· 6.21 mi
6:55/mi
42:20
↑ 79↓ 1380.4%
15K· 9.32 mi
7:04/mi
1:04:17
↑ 67↓ 78
20K· 12.43 mi
7:27/mi
1:27:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:32:24
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:50:40
↑ 66↓ 880.2%
30K· 18.64 mi
8:06/mi
2:15:49
↑ 181↓ 1480.2%
20M
8:07/mi
2:26:51
↑ 64↓ 500.2%
21M
8:54/mi
2:35:45
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
2:41:46
↑ 17↓ 861.7%
23M
8:17/mi
2:52:08
↑ 23↓ 630.6%
24M
8:18/mi
3:00:26
↓ 821.3%
40K· 24.85 mi
8:26/mi
3:07:39
↓ 200.3%
25.2M
8:00/mi
3:10:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:18:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:24
Pace7:03 /mi
2nd Half
Distance13.11 mi
Time1:46:10
Pace8:06 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:4820:506:4220:50
6:42
-
10K
6.21 mi10:48:1842:206:4921:30
6:55
+0:13
15K
9.32 mi11:10:151:04:176:5421:57
7:04
+0:09
20K
12.43 mi11:33:241:27:267:0223:09
7:27
+0:23
Half
13.11 mi11:38:221:32:247:034:58
7:17
-0:10
25K
15.53 mi11:56:381:50:407:0718:16
7:32
+0:15
30K
18.64 mi12:21:472:15:497:1725:09
8:06
+0:34
20M
20.00 mi12:32:492:26:517:2111:02
8:07
+0:01
21M
21.00 mi12:41:432:35:457:258:54
8:54
+0:47
35K
21.75 mi12:47:442:41:467:266:01
8:03
-0:51
23M
23.00 mi12:58:062:52:087:2910:22
8:17
+0:14
24M
24.00 mi13:06:243:00:267:318:18
8:18
+0:01
40K
24.85 mi13:13:373:07:397:337:13
8:26
+0:08
25.2M
25.20 mi13:16:233:10:257:332:46
8:00
-0:26
Finish
26.22 mi13:24:323:18:347:358:09
8:00
0:00

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

6:42 /mi

Average Pace

7:35 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:40

56% of race

Time at Steady Pace

1:11:47

36% of race

Time at Slower Pace

16:07

8% of race

Average Pace: 7:34 /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 mi10:26:4820:506:4220:50
6:42
#5507
10K
6.21 mi10:48:1842:206:4921:30
6:55
#6433
15K
9.32 mi11:10:151:04:176:5421:57
7:04
#7052
20K
12.43 mi11:33:241:27:267:0223:09
7:27
#7726
Half
13.11 mi11:38:221:32:247:034:58
7:17
#7813
25K
15.53 mi11:56:381:50:407:0718:16
7:32
#8096
30K
18.64 mi12:21:472:15:497:1725:09
8:06
#8711
20M
20.00 mi12:32:492:26:517:2111:02
8:07
#8885
21M
21.00 mi12:41:432:35:457:258:54
8:54
#9132
35K
21.75 mi12:47:442:41:467:266:01
8:03
#9223
23M
23.00 mi12:58:062:52:087:2910:22
8:17
#9360
24M
24.00 mi13:06:243:00:267:318:18
8:18
#9532
40K
24.85 mi13:13:373:07:397:337:13
8:26
#9651
25.2M
25.20 mi13:16:233:10:257:332:46
8:00
#9565
Finish
26.22 mi13:24:323:18:347:358:09
8:00
#9705
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5507510951098080(Top 28%)7000(Top 43%)7000(Top 312%)
10K6.21 mi3.10 mi6433-9265865-7565865-7567393(Top 26%)6570(Top 41%)6570(Top 292%)
15K9.32 mi3.11 mi7052-6196327-4626327-4628080(Top 28%)7000(Top 43%)7000(Top 312%)
20K12.43 mi3.11 mi7726-6746784-4576784-45710338(Top 36%)8182(Top 51%)8182(Top 364%)
Half13.11 mi0.68 mi7813-876837-536837-539772(Top 34%)7900(Top 49%)7900(Top 352%)
25K15.53 mi2.42 mi8096-2836984-1476984-14710227(Top 36%)7996(Top 50%)7996(Top 356%)
30K18.64 mi3.11 mi8711-6157314-3307314-33012045(Top 42%)8695(Top 54%)8695(Top 387%)
20M20.00 mi1.36 mi8885-1747372-587372-5811211(Top 39%)8130(Top 50%)8130(Top 362%)
21M21.00 mi1.00 mi9132-2477478-1067478-10612880(Top 45%)8780(Top 55%)8780(Top 391%)
35K21.75 mi0.75 mi9223-917495-177495-1712484(Top 44%)8545(Top 53%)8545(Top 380%)
23M23.00 mi1.25 mi9360-1377540-457540-4511900(Top 42%)8182(Top 51%)8182(Top 364%)
24M24.00 mi1.00 mi9532-1727594-547594-5413227(Top 47%)8752(Top 54%)8752(Top 389%)
40K24.85 mi0.85 mi9651-1197624-307624-3013005(Top 46%)8520(Top 53%)8520(Top 379%)
25.2M25.20 mi0.35 mi9565+867561+637561+635931(Top 21%)4658(Top 29%)4658(Top 207%)
Finish26.22 mi1.02 mi9705-1407587-267587-2612928(Top 46%)8482(Top 53%)8482(Top 377%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

8080

Males

7000

M40-44

7000

5K→10K

3.1 - 6.2 mi

Top 26%
×5story building
+79ft-138ft

Overall

7393

Males

6570

M40-44

6570

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

8080

Males

7000

M40-44

7000

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10338

Males

8182

M40-44

8182

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9772

Males

7900

M40-44

7900

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

10227

Males

7996

M40-44

7996

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

12045

Males

8695

M40-44

8695

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11211

Males

8130

M40-44

8130

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12880

Males

8780

M40-44

8780

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

12484

Males

8545

M40-44

8545

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11900

Males

8182

M40-44

8182

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13227

Males

8752

M40-44

8752

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13005

Males

8520

M40-44

8520

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5931

Males

4658

M40-44

4658

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12928

Males

8482

M40-44

8482

Passing Analysis

Category:
Athletes Passed
648
Passed By
4846
Net Change
-4198
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5507
5K → 10K23949-926#5507#6433
10K → 15K35654-619#6433#7052
15K → 20K27701-674#7052#7726
20K → Half592-87#7726#7813
Half → 25K55338-283#7813#8096
25K → 30K78693-615#8096#8711
30K → 20M59233-174#8711#8885
20M → 21M46293-247#8885#9132
21M → 35K34125-91#9132#9223
35K → 23M78215-137#9223#9360
23M → 24M39211-172#9360#9532
24M → 40K43162-119#9532#9651
40K → 25.2M882+86#9651#9565
25.2M → Finish38178-140#9565#9705
TOTALS6484846-4198
📊

Passing Visuals

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