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BOSTON MARATHON 2025

Gwangsu Kim

Bib: 24350•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
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
8:07/mi
25:12
↑ 97↓ 3451.5%
10K· 6.21 mi
8:13/mi
50:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:16:42
↑ 67↓ 78
20K· 12.43 mi
8:36/mi
1:43:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:49:12
↑ 19↓ 370.5%
25K· 15.53 mi
8:43/mi
2:10:20
↑ 66↓ 880.2%
30K· 18.64 mi
9:15/mi
2:39:03
↑ 181↓ 1480.2%
20M
10:03/mi
2:52:42
↑ 64↓ 500.2%
21M
12:09/mi
3:04:51
↑ 106↓ 241.6%
35K· 21.75 mi
10:59/mi
3:13:04
↑ 17↓ 861.7%
23M
12:49/mi
3:29:07
↑ 23↓ 630.6%
24M
11:27/mi
3:40:34
↓ 821.3%
40K· 24.85 mi
13:08/mi
3:51:48
↓ 200.3%
25.2M
14:10/mi
3:56:41
↑ 13↓ 160.2%
Finish· 26.22 mi
11:18/mi
4:08:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:12
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time2:19:00
Pace10:36 /mi
📊Positive Split: 27.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:2925:128:0725:12
8:07
-
10K
6.21 mi11:49:0050:438:1025:31
8:13
+0:06
15K
9.32 mi12:14:591:16:428:1425:59
8:22
+0:09
20K
12.43 mi12:41:421:43:258:1926:43
8:36
+0:14
Half
13.11 mi12:47:291:49:128:205:47
8:29
-0:07
25K
15.53 mi13:08:372:10:208:2321:08
8:43
+0:14
30K
18.64 mi13:37:202:39:038:3228:43
9:15
+0:32
20M
20.00 mi13:50:592:52:428:3813:39
10:03
+0:48
21M
21.00 mi14:03:083:04:518:4812:09
12:09
+2:06
35K
21.75 mi14:11:213:13:048:538:13
10:59
-1:10
23M
23.00 mi14:27:243:29:079:0616:03
12:49
+1:50
24M
24.00 mi14:38:513:40:349:1111:27
11:27
-1:22
40K
24.85 mi14:50:053:51:489:2011:14
13:08
+1:41
25.2M
25.20 mi14:54:583:56:419:244:53
14:10
+1:02
Finish
26.22 mi15:06:294:08:129:2811:31
11:18
-2:52

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

8:07 /mi

Average Pace

9:28 /mi

Slowest Pace

14:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:20

53% of race

Time at Steady Pace

50:35

20% of race

Time at Slower Pace

1:07:17

27% of race

Average Pace: 9:28 /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 mi11:23:2925:128:0725:12
8:07
#17431
10K
6.21 mi11:49:0050:438:1025:31
8:13
#17701
15K
9.32 mi12:14:591:16:428:1425:59
8:22
#17952
20K
12.43 mi12:41:421:43:258:1926:43
8:36
#18138
Half
13.11 mi12:47:291:49:128:205:47
8:29
#18162
25K
15.53 mi13:08:372:10:208:2321:08
8:43
#18202
30K
18.64 mi13:37:202:39:038:3228:43
9:15
#18338
20M
20.00 mi13:50:592:52:428:3813:39
10:03
#18629
21M
21.00 mi14:03:083:04:518:4812:09
12:09
#19191
35K
21.75 mi14:11:213:13:048:538:13
10:59
#19511
23M
23.00 mi14:27:243:29:079:0616:03
12:49
#20341
24M
24.00 mi14:38:513:40:349:1111:27
11:27
#20682
40K
24.85 mi14:50:053:51:489:2011:14
13:08
#21108
25.2M
25.20 mi14:54:583:56:419:244:53
14:10
#21246
Finish
26.22 mi15:06:294:08:129:2811:31
11:18
#21500
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi17431113911139118468(Top 65%)11829(Top 73%)11829(Top 1851%)
10K6.21 mi3.10 mi17701-27011503-11211503-11217975(Top 63%)11653(Top 72%)11653(Top 1824%)
15K9.32 mi3.11 mi17952-25111604-10111604-10118468(Top 65%)11829(Top 73%)11829(Top 1851%)
20K12.43 mi3.11 mi18138-18611672-6811672-6818838(Top 66%)11970(Top 74%)11970(Top 1873%)
Half13.11 mi0.68 mi18162-2411675-311675-319040(Top 67%)12080(Top 75%)12080(Top 1890%)
25K15.53 mi2.42 mi18202-4011679-411679-418498(Top 65%)11748(Top 73%)11748(Top 1838%)
30K18.64 mi3.11 mi18338-13611712-3311712-3318860(Top 66%)11771(Top 73%)11771(Top 1842%)
20M20.00 mi1.36 mi18629-29111816-10411816-10421098(Top 74%)12634(Top 78%)12634(Top 1977%)
21M21.00 mi1.00 mi19191-56212031-21512031-21523838(Top 84%)13835(Top 86%)13835(Top 2165%)
35K21.75 mi0.75 mi19511-32012148-11712148-11724147(Top 85%)13941(Top 87%)13941(Top 2182%)
23M23.00 mi1.25 mi20341-83012476-32812476-32826175(Top 92%)14924(Top 93%)14924(Top 2336%)
24M24.00 mi1.00 mi20682-34112624-14812624-14824810(Top 87%)14202(Top 88%)14202(Top 2223%)
40K24.85 mi0.85 mi21108-42612790-16612790-16626421(Top 93%)15009(Top 93%)15009(Top 2349%)
25.2M25.20 mi0.35 mi21246-13812846-5612846-5626446(Top 93%)14970(Top 93%)14970(Top 2343%)
Finish26.22 mi1.02 mi21500-25412948-10212948-10225868(Top 91%)14715(Top 91%)14715(Top 2303%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18468

Males

11829

M65-69

11829

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17975

Males

11653

M65-69

11653

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18468

Males

11829

M65-69

11829

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18838

Males

11970

M65-69

11970

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19040

Males

12080

M65-69

12080

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18498

Males

11748

M65-69

11748

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18860

Males

11771

M65-69

11771

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

21098

Males

12634

M65-69

12634

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

23838

Males

13835

M65-69

13835

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

24147

Males

13941

M65-69

13941

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

26175

Males

14924

M65-69

14924

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

24810

Males

14202

M65-69

14202

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26421

Males

15009

M65-69

15009

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26446

Males

14970

M65-69

14970

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

25868

Males

14715

M65-69

14715

Passing Analysis

Category:
Athletes Passed
915
Passed By
4984
Net Change
-4069
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17431
5K → 10K176446-270#17431#17701
10K → 15K113364-251#17701#17952
15K → 20K136322-186#17952#18138
20K → Half3458-24#18138#18162
Half → 25K152192-40#18162#18202
25K → 30K199335-136#18202#18338
30K → 20M43334-291#18338#18629
20M → 21M15577-562#18629#19191
21M → 35K8328-320#19191#19511
35K → 23M12842-830#19511#20341
23M → 24M11352-341#20341#20682
24M → 40K3429-426#20682#21108
40K → 25.2M4142-138#21108#21246
25.2M → Finish9263-254#21246#21500
TOTALS9154984-4069
📊

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