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BOSTON MARATHON 2025

Darren Khou

Bib: 3997•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 29%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:26
Rank: #7048
Start → 5K
21:26 | 6:54/mi
10K· 6.21 mi
42:41
Rank: #6916 (+132)
5K → 10K
21:15 | 6:50/mi
15K· 9.32 mi
1:03:57
Rank: #6754 (+162)
10K → 15K
21:16 | 6:51/mi
20K· 12.43 mi
1:25:16
Rank: #6508 (+246)
15K → 20K
21:19 | 6:52/mi
Half· 13.11 mi
1:29:57
Rank: #6510 (-2)
20K → Half
4:41 | 6:52/mi
25K· 15.53 mi
1:46:35
Rank: #6263 (+247)
Half → 25K
16:38 | 6:52/mi
30K· 18.64 mi
2:08:07
Rank: #5768 (+495)
25K → 30K
21:32 | 6:56/mi
20M
2:17:29
Rank: #5559 (+209)
30K → 20M
9:22 | 6:54/mi
21M
2:24:36
Rank: #5319 (+240)
20M → 21M
7:07 | 7:07/mi
35K· 21.75 mi
2:29:39
Rank: #5236 (+83)
21M → 35K
5:03 | 6:45/mi
23M
2:38:21
Rank: #5082 (+154)
35K → 23M
8:42 | 6:57/mi
24M
2:45:23
Rank: #5057 (+25)
23M → 24M
7:02 | 7:02/mi
40K· 24.85 mi
2:51:35
Rank: #5038 (+19)
24M → 40K
6:12 | 7:15/mi
25.2M
2:54:33
Rank: #5071 (-33)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:02:17
Rank: #5174 (-103)
25.2M → Finish
7:44 | 7:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:57
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:32:20
Pace7:03 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:0621:266:5421:26
6:54
-
10K
6.21 mi10:48:2142:416:5221:15
6:50
-0:04
15K
9.32 mi11:09:371:03:576:5221:16
6:51
+0:01
20K
12.43 mi11:30:561:25:166:5221:19
6:52
+0:01
Half
13.11 mi11:35:371:29:576:524:41
6:52
0:00
25K
15.53 mi11:52:151:46:356:5216:38
6:52
0:00
30K
18.64 mi12:13:472:08:076:5221:32
6:56
+0:04
20M
20.00 mi12:23:092:17:296:529:22
6:54
-0:02
21M
21.00 mi12:30:162:24:366:537:07
7:07
+0:13
35K
21.75 mi12:35:192:29:396:535:03
6:45
-0:22
23M
23.00 mi12:44:012:38:216:538:42
6:57
+0:12
24M
24.00 mi12:51:032:45:236:537:02
7:02
+0:05
40K
24.85 mi12:57:152:51:356:546:12
7:15
+0:13
25.2M
25.20 mi13:00:132:54:336:562:58
8:36
+1:21
Finish
26.22 mi13:07:573:02:176:577:44
7:35
-1:01

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

6:45 /mi

Average Pace

6:57 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:45:23

91% of race

Time at Slower Pace

16:54

9% of race

Average Pace: 6:57 /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 mi10:27:0621:266:5421:26
6:54
#7048
10K
6.21 mi10:48:2142:416:5221:15
6:50
#6916
15K
9.32 mi11:09:371:03:576:5221:16
6:51
#6754
20K
12.43 mi11:30:561:25:166:5221:19
6:52
#6508
Half
13.11 mi11:35:371:29:576:524:41
6:52
#6510
25K
15.53 mi11:52:151:46:356:5216:38
6:52
#6263
30K
18.64 mi12:13:472:08:076:5221:32
6:56
#5768
20M
20.00 mi12:23:092:17:296:529:22
6:54
#5559
21M
21.00 mi12:30:162:24:366:537:07
7:07
#5319
35K
21.75 mi12:35:192:29:396:535:03
6:45
#5236
23M
23.00 mi12:44:012:38:216:538:42
6:57
#5082
24M
24.00 mi12:51:032:45:236:537:02
7:02
#5057
40K
24.85 mi12:57:152:51:356:546:12
7:15
#5038
25.2M
25.20 mi13:00:132:54:336:562:58
8:36
#5071
Finish
26.22 mi13:07:573:02:176:577:44
7:35
#5174
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7048633563356504(Top 23%)5866(Top 36%)5866(Top 104%)
10K6.21 mi3.10 mi6916+1326230+1056230+1056765(Top 24%)6094(Top 38%)6094(Top 108%)
15K9.32 mi3.11 mi6754+1626088+1426088+1426504(Top 23%)5866(Top 36%)5866(Top 104%)
20K12.43 mi3.11 mi6508+2465886+2025886+2025861(Top 21%)5321(Top 33%)5321(Top 94%)
Half13.11 mi0.68 mi6510-25881+55881+56581(Top 23%)5877(Top 36%)5877(Top 104%)
25K15.53 mi2.42 mi6263+2475668+2135668+2135354(Top 19%)4882(Top 30%)4882(Top 87%)
30K18.64 mi3.11 mi5768+4955251+4175251+4174276(Top 15%)3926(Top 24%)3926(Top 70%)
20M20.00 mi1.36 mi5559+2095078+1735078+1733478(Top 12%)3214(Top 20%)3214(Top 57%)
21M21.00 mi1.00 mi5319+2404864+2144864+2142764(Top 10%)2567(Top 16%)2567(Top 45%)
35K21.75 mi0.75 mi5236+834794+704794+703806(Top 13%)3428(Top 21%)3428(Top 61%)
23M23.00 mi1.25 mi5082+1544652+1424652+1423465(Top 12%)3148(Top 20%)3148(Top 56%)
24M24.00 mi1.00 mi5057+254620+324620+324808(Top 17%)4122(Top 26%)4122(Top 73%)
40K24.85 mi0.85 mi5038+194595+254595+255325(Top 19%)4426(Top 27%)4426(Top 78%)
25.2M25.20 mi0.35 mi5071-334618-234618-239299(Top 33%)6551(Top 41%)6551(Top 116%)
Finish26.22 mi1.02 mi5174-1034692-744692-749801(Top 35%)6862(Top 43%)6862(Top 122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6504

Males

5866

M18-39

5866

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6765

Males

6094

M18-39

6094

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6504

Males

5866

M18-39

5866

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5861

Males

5321

M18-39

5321

20K→Half

12.4 - 13.1 mi

Top 23%
×2stories
+19ft-37ft

Overall

6581

Males

5877

M18-39

5877

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5354

Males

4882

M18-39

4882

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4276

Males

3926

M18-39

3926

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3478

Males

3214

M18-39

3214

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2764

Males

2567

M18-39

2567

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3806

Males

3428

M18-39

3428

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3465

Males

3148

M18-39

3148

23M→24M

23.0 - 24.0 mi

Top 17%
×6stories
+12ft-82ft

Overall

4808

Males

4122

M18-39

4122

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5325

Males

4426

M18-39

4426

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9299

Males

6551

M18-39

6551

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9801

Males

6862

M18-39

6862

Passing Analysis

Category:
Athletes Passed
2431
Passed By
557
Net Change
+1874
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7048
5K → 10K259127+132#7048#6916
10K → 15K23674+162#6916#6754
15K → 20K27832+246#6754#6508
20K → Half2527-2#6508#6510
Half → 25K26619+247#6510#6263
25K → 30K5016+495#6263#5768
30K → 20M2145+209#5768#5559
20M → 21M2411+240#5559#5319
21M → 35K918+83#5319#5236
35K → 23M16511+154#5236#5082
23M → 24M6641+25#5082#5057
24M → 40K6142+19#5057#5038
40K → 25.2M1346-33#5038#5071
25.2M → Finish15118-103#5071#5174
TOTALS2431557+1874
📊

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