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BOSTON MARATHON 2025

Sum Ko

Bib: 24953•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M70-74)
#0 / 228
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
9:41/mi
30:04
↑ 97↓ 3451.5%
10K· 6.21 mi
10:04/mi
1:01:19
↑ 79↓ 1380.4%
15K· 9.32 mi
10:36/mi
1:34:16
↑ 67↓ 78
20K· 12.43 mi
12:12/mi
2:12:10
↑ 106↓ 860.1%
Half· 13.11 mi
11:01/mi
2:19:41
↑ 19↓ 370.5%
25K· 15.53 mi
12:29/mi
2:49:57
↑ 66↓ 880.2%
30K· 18.64 mi
15:04/mi
3:36:45
↑ 181↓ 1480.2%
20M
13:35/mi
3:55:12
↑ 64↓ 500.2%
21M
14:56/mi
4:10:08
↑ 106↓ 241.6%
35K· 21.75 mi
12:59/mi
4:19:51
↑ 17↓ 861.7%
23M
13:48/mi
4:37:08
↑ 23↓ 630.6%
24M
14:40/mi
4:51:48
↓ 821.3%
40K· 24.85 mi
14:51/mi
5:04:30
↓ 200.3%
25.2M
16:55/mi
5:10:20
↑ 13↓ 160.2%
Finish· 26.22 mi
12:34/mi
5:23:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:19:41
Pace10:39 /mi
2nd Half
Distance13.11 mi
Time3:03:27
Pace14:00 /mi
📊Positive Split: 31.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:29:5730:049:4130:04
9:41
-
10K
6.21 mi12:01:121:01:199:5231:15
10:04
+0:23
15K
9.32 mi12:34:091:34:1610:0732:57
10:36
+0:32
20K
12.43 mi13:12:032:12:1010:3837:54
12:12
+1:36
Half
13.11 mi13:19:342:19:4110:397:31
11:01
-1:11
25K
15.53 mi13:49:502:49:5710:5630:16
12:29
+1:28
30K
18.64 mi14:36:383:36:4511:3846:48
15:04
+2:35
20M
20.00 mi14:55:053:55:1211:4618:27
13:35
-1:29
21M
21.00 mi15:10:014:10:0811:5514:56
14:56
+1:21
35K
21.75 mi15:19:444:19:5111:579:43
12:59
-1:57
23M
23.00 mi15:37:014:37:0812:0317:17
13:48
+0:49
24M
24.00 mi15:51:414:51:4812:1014:40
14:40
+0:52
40K
24.85 mi16:04:235:04:3012:1512:42
14:51
+0:11
25.2M
25.20 mi16:10:135:10:2012:195:50
16:55
+2:04
Finish
26.22 mi16:23:015:23:0812:2012:48
12:34
-4:21

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

9:41 /mi

Average Pace

12:20 /mi

Slowest Pace

16:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:47

31% of race

Time at Steady Pace

2:06:25

39% of race

Time at Slower Pace

1:34:56

29% of race

Average Pace: 12:19 /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 mi11:29:5730:049:4130:04
9:41
#24783
10K
6.21 mi12:01:121:01:199:5231:15
10:04
#25111
15K
9.32 mi12:34:091:34:1610:0732:57
10:36
#25563
20K
12.43 mi13:12:032:12:1010:3837:54
12:12
#26217
Half
13.11 mi13:19:342:19:4110:397:31
11:01
#26242
25K
15.53 mi13:49:502:49:5710:5630:16
12:29
#26404
30K
18.64 mi14:36:383:36:4511:3846:48
15:04
#26935
20M
20.00 mi14:55:053:55:1211:4618:27
13:35
#26956
21M
21.00 mi15:10:014:10:0811:5514:56
14:56
#26983
35K
21.75 mi15:19:444:19:5111:579:43
12:59
#27001
23M
23.00 mi15:37:014:37:0812:0317:17
13:48
#27022
24M
24.00 mi15:51:414:51:4812:1014:40
14:40
#27088
40K
24.85 mi16:04:235:04:3012:1512:42
14:51
#27122
25.2M
25.20 mi16:10:135:10:2012:195:50
16:55
#27156
Finish
26.22 mi16:23:015:23:0812:2012:48
12:34
#27172
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi24783146191461926119(Top 92%)15199(Top 94%)15199(Top 6666%)
10K6.21 mi3.10 mi25111-32814763-14414763-14425439(Top 90%)14890(Top 92%)14890(Top 6531%)
15K9.32 mi3.11 mi25563-45214963-20014963-20026119(Top 92%)15199(Top 94%)15199(Top 6666%)
20K12.43 mi3.11 mi26217-65415256-29315256-29327274(Top 96%)15638(Top 97%)15638(Top 6859%)
Half13.11 mi0.68 mi26242-2515258-215258-226533(Top 93%)15328(Top 95%)15328(Top 6723%)
25K15.53 mi2.42 mi26404-16215318-6015318-6026915(Top 95%)15468(Top 96%)15468(Top 6784%)
30K18.64 mi3.11 mi26935-53115511-19315511-19328056(Top 99%)15903(Top 99%)15903(Top 6975%)
20M20.00 mi1.36 mi26956-2115512-115512-126974(Top 95%)15362(Top 95%)15362(Top 6738%)
21M21.00 mi1.00 mi26983-2715513-115513-127093(Top 95%)15414(Top 96%)15414(Top 6761%)
35K21.75 mi0.75 mi27001-1815517-415517-426954(Top 95%)15320(Top 95%)15320(Top 6719%)
23M23.00 mi1.25 mi27022-2115514+315514+327161(Top 96%)15408(Top 96%)15408(Top 6758%)
24M24.00 mi1.00 mi27088-6615531-1715531-1727941(Top 98%)15795(Top 98%)15795(Top 6928%)
40K24.85 mi0.85 mi27122-3415541-1015541-1027707(Top 98%)15666(Top 97%)15666(Top 6871%)
25.2M25.20 mi0.35 mi27156-3415557-1615557-1628043(Top 99%)15847(Top 98%)15847(Top 6950%)
Finish26.22 mi1.02 mi27172-1615558-115558-127336(Top 96%)15480(Top 96%)15480(Top 6789%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

26119

Males

15199

M70-74

15199

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

25439

Males

14890

M70-74

14890

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

26119

Males

15199

M70-74

15199

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

27274

Males

15638

M70-74

15638

20K→Half

12.4 - 13.1 mi

Top 93%
×2story building
+19ft-37ft

Overall

26533

Males

15328

M70-74

15328

Half→25K

13.1 - 15.5 mi

Top 95%
×4story building
+66ft-88ft

Overall

26915

Males

15468

M70-74

15468

25K→30K

15.5 - 18.6 mi

Top 99%
×9story building
+181ft-148ft

Overall

28056

Males

15903

M70-74

15903

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

26974

Males

15362

M70-74

15362

20M→21M

20.0 - 21.0 mi

Top 95%
×8story building
+106ft-24ft

Overall

27093

Males

15414

M70-74

15414

21M→35K

21.0 - 21.8 mi

Top 95%
×7story building
+17ft-86ft

Overall

26954

Males

15320

M70-74

15320

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27161

Males

15408

M70-74

15408

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

27941

Males

15795

M70-74

15795

24M→40K

24.0 - 24.9 mi

Top 98%
×1story
+6ft-20ft

Overall

27707

Males

15666

M70-74

15666

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

28043

Males

15847

M70-74

15847

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2story building
+22ft-21ft

Overall

27336

Males

15480

M70-74

15480

Passing Analysis

Category:
Athletes Passed
299
Passed By
2688
Net Change
-2389
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24783
5K → 10K83411-328#24783#25111
10K → 15K34486-452#25111#25563
15K → 20K19673-654#25563#26217
20K → Half1742-25#26217#26242
Half → 25K39201-162#26242#26404
25K → 30K10541-531#26404#26935
30K → 20M2748-21#26935#26956
20M → 21M1441-27#26956#26983
21M → 35K523-18#26983#27001
35K → 23M2041-21#27001#27022
23M → 24M571-66#27022#27088
24M → 40K1246-34#27088#27122
40K → 25.2M135-34#27122#27156
25.2M → Finish1329-16#27156#27172
TOTALS2992688-2389
📊

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