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BOSTON MARATHON 2025

Gwi Seob Lim

Bib: 12550•M

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:37
Rank: #7501
Start → 5K
6:57/mi
21:37 split
10K· 6.21 mi
43:46
Rank: #8206 (-705)
5K → 10K
7:08/mi
22:09 split
15K· 9.32 mi
1:06:28
Rank: #8751 (-545)
10K → 15K
7:18/mi
22:42 split
20K· 12.43 mi
1:30:07
Rank: #9427 (-676)
15K → 20K
7:37/mi
23:39 split
Half· 13.11 mi
1:35:14
Rank: #9543 (-116)
20K → Half
7:30/mi
5:07 split
25K· 15.53 mi
1:56:23
Rank: #11268 (-1725)
Half → 25K
8:43/mi
21:09 split
30K· 18.64 mi
2:26:49
Rank: #13682 (-2414)
25K → 30K
9:48/mi
30:26 split
20M
2:40:54
Rank: #14706 (-1024)
30K → 20M
10:22/mi
14:05 split
21M
2:52:50
Rank: #15613 (-907)
20M → 21M
11:56/mi
11:56 split
35K· 21.75 mi
3:00:25
Rank: #15947 (-334)
21M → 35K
10:08/mi
7:35 split
23M
3:12:28
Rank: #16125 (-178)
35K → 23M
9:37/mi
12:03 split
24M
3:21:32
Rank: #16182 (-57)
23M → 24M
9:04/mi
9:04 split
40K· 24.85 mi
3:29:41
Rank: #16313 (-131)
24M → 40K
9:32/mi
8:09 split
25.2M
3:33:08
Rank: #16325 (-12)
40K → 25.2M
10:00/mi
3:27 split
Finish· 26.22 mi
3:41:09
Rank: #16151 (+174)
25.2M → Finish
7:52/mi
8:01 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:14
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time2:05:55
Pace9:36 /mi
📊Positive Split: 32.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5321:376:5721:37
6:57
-
10K
6.21 mi11:12:0243:467:0322:09
7:08
+0:11
15K
9.32 mi11:34:441:06:287:0822:42
7:18
+0:10
20K
12.43 mi11:58:231:30:077:1523:39
7:37
+0:19
Half
13.11 mi12:03:301:35:147:165:07
7:30
-0:07
25K
15.53 mi12:24:391:56:237:3021:09
8:43
+1:13
30K
18.64 mi12:55:052:26:497:5330:26
9:48
+1:05
20M
20.00 mi13:09:102:40:548:0314:05
10:22
+0:34
21M
21.00 mi13:21:062:52:508:1411:56
11:56
+1:34
35K
21.75 mi13:28:413:00:258:187:35
10:08
-1:48
23M
23.00 mi13:40:443:12:288:2212:03
9:37
-0:31
24M
24.00 mi13:49:483:21:328:249:04
9:04
-0:33
40K
24.85 mi13:57:573:29:418:268:09
9:32
+0:28
25.2M
25.20 mi14:01:243:33:088:273:27
10:00
+0:28
Finish
26.22 mi14:09:253:41:098:268:01
7:52
-2:08

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

6:57 /mi

Average Pace

8:26 /mi

Slowest Pace

11:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:15

47% of race

Time at Steady Pace

50:25

23% of race

Time at Slower Pace

1:07:29

31% of race

Average Pace: 8:26 /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 mi10:49:5321:376:5721:37
6:57
#7501
10K
6.21 mi11:12:0243:467:0322:09
7:08
#8206
15K
9.32 mi11:34:441:06:287:0822:42
7:18
#8751
20K
12.43 mi11:58:231:30:077:1523:39
7:37
#9427
Half
13.11 mi12:03:301:35:147:165:07
7:30
#9543
25K
15.53 mi12:24:391:56:237:3021:09
8:43
#11268
30K
18.64 mi12:55:052:26:497:5330:26
9:48
#13682
20M
20.00 mi13:09:102:40:548:0314:05
10:22
#14706
21M
21.00 mi13:21:062:52:508:1411:56
11:56
#15613
35K
21.75 mi13:28:413:00:258:187:35
10:08
#15947
23M
23.00 mi13:40:443:12:288:2212:03
9:37
#16125
24M
24.00 mi13:49:483:21:328:249:04
9:04
#16182
40K
24.85 mi13:57:573:29:418:268:09
9:32
#16313
25.2M
25.20 mi14:01:243:33:088:273:27
10:00
#16325
Finish
26.22 mi14:09:253:41:098:268:01
7:52
#16151
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi75016676667610042(Top 35%)8110(Top 50%)8110(Top 340%)
10K6.21 mi3.10 mi8206-7057119-4437119-4438924(Top 31%)7562(Top 47%)7562(Top 317%)
15K9.32 mi3.11 mi8751-5457437-3187437-31810042(Top 35%)8110(Top 50%)8110(Top 340%)
20K12.43 mi3.11 mi9427-6767795-3587795-35811685(Top 41%)8829(Top 55%)8829(Top 370%)
Half13.11 mi0.68 mi9543-1167849-547849-5411707(Top 41%)8917(Top 55%)8917(Top 374%)
25K15.53 mi2.42 mi11268-17258717-8688717-86818520(Top 65%)11750(Top 73%)11750(Top 492%)
30K18.64 mi3.11 mi13682-24149718-10019718-100120970(Top 74%)12699(Top 79%)12699(Top 532%)
20M20.00 mi1.36 mi14706-102410132-41410132-41422035(Top 78%)13065(Top 81%)13065(Top 548%)
21M21.00 mi1.00 mi15613-90710487-35510487-35523468(Top 83%)13657(Top 85%)13657(Top 572%)
35K21.75 mi0.75 mi15947-33410607-12010607-12022251(Top 78%)13028(Top 81%)13028(Top 546%)
23M23.00 mi1.25 mi16125-17810655-4810655-4819157(Top 67%)11513(Top 71%)11513(Top 483%)
24M24.00 mi1.00 mi16182-5710652+310652+317672(Top 62%)10769(Top 67%)10769(Top 451%)
40K24.85 mi0.85 mi16313-13110686-3410686-3418818(Top 66%)11227(Top 70%)11227(Top 471%)
25.2M25.20 mi0.35 mi16325-1210685+110685+116996(Top 60%)10361(Top 64%)10361(Top 434%)
Finish26.22 mi1.02 mi16151+17410590+9510590+9511933(Top 42%)8014(Top 50%)8014(Top 336%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

10042

Males

8110

M45-49

8110

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8924

Males

7562

M45-49

7562

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

10042

Males

8110

M45-49

8110

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

11685

Males

8829

M45-49

8829

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11707

Males

8917

M45-49

8917

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18520

Males

11750

M45-49

11750

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

20970

Males

12699

M45-49

12699

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22035

Males

13065

M45-49

13065

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

23468

Males

13657

M45-49

13657

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

22251

Males

13028

M45-49

13028

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

19157

Males

11513

M45-49

11513

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17672

Males

10769

M45-49

10769

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18818

Males

11227

M45-49

11227

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16996

Males

10361

M45-49

10361

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11933

Males

8014

M45-49

8014

Passing Analysis

Category:
Athletes Passed
585
Passed By
9233
Net Change
-8650
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7501
5K → 10K38743-705#7501#8206
10K → 15K45590-545#8206#8751
15K → 20K52728-676#8751#9427
20K → Half8124-116#9427#9543
Half → 25K161739-1725#9543#11268
25K → 30K132427-2414#11268#13682
30K → 20M171041-1024#13682#14706
20M → 21M17924-907#14706#15613
21M → 35K15349-334#15613#15947
35K → 23M67245-178#15947#16125
23M → 24M53110-57#16125#16182
24M → 40K29160-131#16182#16313
40K → 25.2M2840-12#16313#16325
25.2M → Finish18713+174#16325#16151
TOTALS5859233-8650
📊

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