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BOSTON MARATHON 2025

Kwang-Youn Kim

Bib: 5723•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 33%
Gender (Male)
#0 / 16105
Top 46%
Masters (Masters Men)
#0 / 10463
Top 35%
Division (M45-49)
#0 / 2386
Top 50%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:29
Rank: #12714
Start → 5K
23:29 | 7:34/mi
10K· 6.21 mi
47:15
Rank: #13069 (-355)
5K → 10K
23:46 | 7:39/mi
15K· 9.32 mi
1:10:40
Rank: #12697 (+372)
10K → 15K
23:25 | 7:32/mi
20K· 12.43 mi
1:34:19
Rank: #12394 (+303)
15K → 20K
23:39 | 7:37/mi
Half· 13.11 mi
1:39:30
Rank: #12399 (-5)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:57:45
Rank: #12000 (+399)
Half → 25K
18:15 | 7:32/mi
30K· 18.64 mi
2:21:14
Rank: #11245 (+755)
25K → 30K
23:29 | 7:34/mi
20M
2:31:32
Rank: #10904 (+341)
30K → 20M
10:18 | 7:35/mi
21M
2:39:25
Rank: #10605 (+299)
20M → 21M
7:53 | 7:53/mi
35K· 21.75 mi
2:44:46
Rank: #10418 (+187)
21M → 35K
5:21 | 7:09/mi
23M
2:54:02
Rank: #10064 (+354)
35K → 23M
9:16 | 7:24/mi
24M
3:01:16
Rank: #9823 (+241)
23M → 24M
7:14 | 7:14/mi
40K· 24.85 mi
3:07:36
Rank: #9629 (+194)
24M → 40K
6:20 | 7:24/mi
25.2M
3:10:28
Rank: #9583 (+46)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:17:59
Rank: #9509 (+74)
25.2M → Finish
7:31 | 7:23/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:30
Pace7:35 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:29
Pace7:31 /mi
📊Negative Split: 1.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:30:0123:297:3423:29
7:34
-
10K
6.21 mi10:53:4747:157:3623:46
7:39
+0:05
15K
9.32 mi11:17:121:10:407:3523:25
7:32
-0:07
20K
12.43 mi11:40:511:34:197:3523:39
7:37
+0:05
Half
13.11 mi11:46:021:39:307:355:11
7:36
-0:01
25K
15.53 mi12:04:171:57:457:3518:15
7:32
-0:04
30K
18.64 mi12:27:462:21:147:3523:29
7:34
+0:02
20M
20.00 mi12:38:042:31:327:3510:18
7:35
+0:01
21M
21.00 mi12:45:572:39:257:357:53
7:53
+0:18
35K
21.75 mi12:51:182:44:467:355:21
7:09
-0:44
23M
23.00 mi13:00:342:54:027:349:16
7:24
+0:15
24M
24.00 mi13:07:483:01:167:337:14
7:14
-0:10
40K
24.85 mi13:14:083:07:367:336:20
7:24
+0:10
25.2M
25.20 mi13:17:003:10:287:332:52
8:19
+0:55
Finish
26.22 mi13:24:313:17:597:337:31
7:23
-0:56

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

7:09 /mi

Average Pace

7:33 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:14

95% of race

Time at Steady Pace

10:45

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:33 /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 mi10:30:0123:297:3423:29
7:34
#12714
10K
6.21 mi10:53:4747:157:3623:46
7:39
#13069
15K
9.32 mi11:17:121:10:407:3523:25
7:32
#12697
20K
12.43 mi11:40:511:34:197:3523:39
7:37
#12394
Half
13.11 mi11:46:021:39:307:355:11
7:36
#12399
25K
15.53 mi12:04:171:57:457:3518:15
7:32
#12000
30K
18.64 mi12:27:462:21:147:3523:29
7:34
#11245
20M
20.00 mi12:38:042:31:327:3510:18
7:35
#10904
21M
21.00 mi12:45:572:39:257:357:53
7:53
#10605
35K
21.75 mi12:51:182:44:467:355:21
7:09
#10418
23M
23.00 mi13:00:342:54:027:349:16
7:24
#10064
24M
24.00 mi13:07:483:01:167:337:14
7:14
#9823
40K
24.85 mi13:14:083:07:367:336:20
7:24
#9629
25.2M
25.20 mi13:17:003:10:287:332:52
8:19
#9583
Finish
26.22 mi13:24:313:17:597:337:31
7:23
#9509
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi127149504950412071(Top 42%)9096(Top 56%)9096(Top 381%)
10K6.21 mi3.10 mi13069-3559647-1439647-14313436(Top 47%)9767(Top 61%)9767(Top 409%)
15K9.32 mi3.11 mi12697+3729455+1929455+19212071(Top 42%)9096(Top 56%)9096(Top 381%)
20K12.43 mi3.11 mi12394+3039274+1819274+18111677(Top 41%)8821(Top 55%)8821(Top 370%)
Half13.11 mi0.68 mi12399-59267+79267+712470(Top 44%)9200(Top 57%)9200(Top 386%)
25K15.53 mi2.42 mi12000+3999047+2209047+22010178(Top 36%)7973(Top 50%)7973(Top 334%)
30K18.64 mi3.11 mi11245+7558625+4228625+4228142(Top 29%)6668(Top 41%)6668(Top 279%)
20M20.00 mi1.36 mi10904+3418417+2088417+2087541(Top 27%)6170(Top 38%)6170(Top 259%)
21M21.00 mi1.00 mi10605+2998229+1888229+1886697(Top 24%)5508(Top 34%)5508(Top 231%)
35K21.75 mi0.75 mi10418+1878118+1118118+1116300(Top 22%)5273(Top 33%)5273(Top 221%)
23M23.00 mi1.25 mi10064+3547902+2167902+2166068(Top 21%)5013(Top 31%)5013(Top 210%)
24M24.00 mi1.00 mi9823+2417746+1567746+1566033(Top 21%)4947(Top 31%)4947(Top 207%)
40K24.85 mi0.85 mi9629+1947610+1367610+1366254(Top 22%)5014(Top 31%)5014(Top 210%)
25.2M25.20 mi0.35 mi9583+467570+407570+407695(Top 27%)5754(Top 36%)5754(Top 241%)
Finish26.22 mi1.02 mi9509+747486+847486+848318(Top 29%)6094(Top 38%)6094(Top 255%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

12071

Males

9096

M45-49

9096

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

13436

Males

9767

M45-49

9767

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

12071

Males

9096

M45-49

9096

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

11677

Males

8821

M45-49

8821

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12470

Males

9200

M45-49

9200

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

10178

Males

7973

M45-49

7973

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

8142

Males

6668

M45-49

6668

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7541

Males

6170

M45-49

6170

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6697

Males

5508

M45-49

5508

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

6300

Males

5273

M45-49

5273

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

6068

Males

5013

M45-49

5013

23M→24M

23.0 - 24.0 mi

Top 21%
×6stories
+12ft-82ft

Overall

6033

Males

4947

M45-49

4947

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

6254

Males

5014

M45-49

5014

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7695

Males

5754

M45-49

5754

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8318

Males

6094

M45-49

6094

Passing Analysis

Category:
Athletes Passed
3939*
Passed By
734
Net Change
+3205
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12714
5K → 10K146501-355#12714#13069
10K → 15K43361+372#13069#12697
15K → 20K36158+303#12697#12394
20K → Half2631-5#12394#12399
Half → 25K40910+399#12399#12000
25K → 30K7627+755#12000#11245
30K → 20M3421+341#11245#10904
20M → 21M3045+299#10904#10605
21M → 35K1881+187#10605#10418
35K → 23M3562+354#10418#10064
23M → 24M245*4+241#10064#9823
24M → 40K1984+194#9823#9629
40K → 25.2M5711+46#9629#9583
25.2M → Finish11238+74#9583#9509
TOTALS3939*734+3205

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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