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BOSTON MARATHON 2025

Kai Lin Cho

Bib: 6337•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 43%
Gender (Male)
#0 / 16105
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
21:56
Rank: #8299
Start → 5K
21:56 | 7:04/mi
10K· 6.21 mi
43:41
Rank: #8092 (+207)
5K → 10K
21:45 | 7:00/mi
15K· 9.32 mi
1:05:42
Rank: #8103 (-11)
10K → 15K
22:01 | 7:05/mi
20K· 12.43 mi
1:28:18
Rank: #8220 (-117)
15K → 20K
22:36 | 7:16/mi
Half· 13.11 mi
1:33:11
Rank: #8225 (-5)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:51:56
Rank: #8725 (-500)
Half → 25K
18:45 | 7:44/mi
30K· 18.64 mi
2:17:00
Rank: #9270 (-545)
25K → 30K
25:04 | 8:04/mi
20M
2:27:48
Rank: #9307 (-37)
30K → 20M
10:48 | 7:57/mi
21M
2:36:27
Rank: #9401 (-94)
20M → 21M
8:39 | 8:39/mi
35K· 21.75 mi
2:44:46
Rank: #10421 (-1020)
21M → 35K
8:19 | 11:07/mi
23M
2:57:47
Rank: #11384 (-963)
35K → 23M
13:01 | 10:24/mi
24M
3:06:39
Rank: #11650 (-266)
23M → 24M
8:52 | 8:52/mi
40K· 24.85 mi
3:14:32
Rank: #11915 (-265)
24M → 40K
7:53 | 9:13/mi
25.2M
3:18:03
Rank: #12029 (-114)
40K → 25.2M
3:31 | 10:12/mi
Finish· 26.22 mi
3:26:31
Rank: #12133 (-104)
25.2M → Finish
8:28 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:11
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:53:20
Pace8:39 /mi
📊Positive Split: 21.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:5021:567:0421:56
7:04
-
10K
6.21 mi10:48:3543:417:0221:45
7:00
-0:04
15K
9.32 mi11:10:361:05:427:0322:01
7:05
+0:05
20K
12.43 mi11:33:121:28:187:0622:36
7:16
+0:11
Half
13.11 mi11:38:051:33:117:064:53
7:09
-0:07
25K
15.53 mi11:56:501:51:567:1218:45
7:44
+0:35
30K
18.64 mi12:21:542:17:007:2125:04
8:04
+0:20
20M
20.00 mi12:32:422:27:487:2310:48
7:57
-0:07
21M
21.00 mi12:41:212:36:277:278:39
8:39
+0:42
35K
21.75 mi12:49:402:44:467:358:19
11:07
+2:28
23M
23.00 mi13:02:412:57:477:4413:01
10:24
-0:43
24M
24.00 mi13:11:333:06:397:478:52
8:52
-1:32
40K
24.85 mi13:19:263:14:327:507:53
9:13
+0:21
25.2M
25.20 mi13:22:573:18:037:523:31
10:12
+0:59
Finish
26.22 mi13:31:253:26:317:538:28
8:19
-1:53

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

7:00 /mi

Average Pace

7:53 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:11

45% of race

Time at Steady Pace

1:11:44

35% of race

Time at Slower Pace

41:36

20% of race

Average Pace: 7:53 /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 mi10:26:5021:567:0421:56
7:04
#8299
10K
6.21 mi10:48:3543:417:0221:45
7:00
#8092
15K
9.32 mi11:10:361:05:427:0322:01
7:05
#8103
20K
12.43 mi11:33:121:28:187:0622:36
7:16
#8220
Half
13.11 mi11:38:051:33:117:064:53
7:09
#8225
25K
15.53 mi11:56:501:51:567:1218:45
7:44
#8725
30K
18.64 mi12:21:542:17:007:2125:04
8:04
#9270
20M
20.00 mi12:32:422:27:487:2310:48
7:57
#9307
21M
21.00 mi12:41:212:36:277:278:39
8:39
#9401
35K
21.75 mi12:49:402:44:467:358:19
11:07
#10421
23M
23.00 mi13:02:412:57:477:4413:01
10:24
#11384
24M
24.00 mi13:11:333:06:397:478:52
8:52
#11650
40K
24.85 mi13:19:263:14:327:507:53
9:13
#11915
25.2M
25.20 mi13:22:573:18:037:523:31
10:12
#12029
Finish
26.22 mi13:31:253:26:317:538:28
8:19
#12133
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8299718771878252(Top 29%)7097(Top 44%)7097(Top 126%)
10K6.21 mi3.10 mi8092+2077047+1407047+1407927(Top 28%)6934(Top 43%)6934(Top 123%)
15K9.32 mi3.11 mi8103-117038+97038+98252(Top 29%)7097(Top 44%)7097(Top 126%)
20K12.43 mi3.11 mi8220-1177087-497087-498835(Top 31%)7362(Top 46%)7362(Top 130%)
Half13.11 mi0.68 mi8225-5708770878745(Top 31%)7357(Top 46%)7357(Top 130%)
25K15.53 mi2.42 mi8725-5007376-2897376-28911802(Top 42%)8753(Top 54%)8753(Top 155%)
30K18.64 mi3.11 mi9270-5457616-2407616-24011860(Top 42%)8605(Top 53%)8605(Top 153%)
20M20.00 mi1.36 mi9307-377605+117605+1110087(Top 36%)7597(Top 47%)7597(Top 135%)
21M21.00 mi1.00 mi9401-947622-177622-1711358(Top 40%)8056(Top 50%)8056(Top 143%)
35K21.75 mi0.75 mi10421-10208121-4998121-49924450(Top 86%)14078(Top 87%)14078(Top 250%)
23M23.00 mi1.25 mi11384-9638533-4128533-41221711(Top 76%)12732(Top 79%)12732(Top 226%)
24M24.00 mi1.00 mi11650-2668622-898622-8916642(Top 59%)10307(Top 64%)10307(Top 183%)
40K24.85 mi0.85 mi11915-2658715-938715-9317412(Top 61%)10550(Top 66%)10550(Top 187%)
25.2M25.20 mi0.35 mi12029-1148760-458760-4517815(Top 63%)10717(Top 67%)10717(Top 190%)
Finish26.22 mi1.02 mi12133-1048789-298789-2914935(Top 53%)9445(Top 59%)9445(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

8252

Males

7097

M18-39

7097

5K→10K

3.1 - 6.2 mi

Top 28%
×5stories
+79ft-138ft

Overall

7927

Males

6934

M18-39

6934

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

8252

Males

7097

M18-39

7097

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8835

Males

7362

M18-39

7362

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8745

Males

7357

M18-39

7357

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

11802

Males

8753

M18-39

8753

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11860

Males

8605

M18-39

8605

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

10087

Males

7597

M18-39

7597

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

11358

Males

8056

M18-39

8056

21M→35K

21.0 - 21.8 mi

Top 86%
×7stories
+17ft-86ft

Overall

24450

Males

14078

M18-39

14078

35K→23M

21.8 - 23.0 mi

Top 76%
×5stories
+23ft-63ft

Overall

21711

Males

12732

M18-39

12732

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

16642

Males

10307

M18-39

10307

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17412

Males

10550

M18-39

10550

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17815

Males

10717

M18-39

10717

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14935

Males

9445

M18-39

9445

Passing Analysis

Category:
Athletes Passed
1016
Passed By
4848
Net Change
-3834
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8299
5K → 10K334127+207#8299#8092
10K → 15K136147-11#8092#8103
15K → 20K114231-117#8103#8220
20K → Half1722-5#8220#8225
Half → 25K45545-500#8225#8725
25K → 30K100645-545#8725#9270
30K → 20M86123-37#9270#9307
20M → 21M60154-94#9307#9401
21M → 35K21020-1020#9401#10421
35K → 23M7970-963#10421#11384
23M → 24M38304-266#11384#11650
24M → 40K28293-265#11650#11915
40K → 25.2M10124-114#11915#12029
25.2M → Finish39143-104#12029#12133
TOTALS10164848-3834
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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