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BOSTON MARATHON 2025

Andrew Ko

Bib: 28130•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
9:17/mi
28:49
↑ 97↓ 3451.5%
10K· 6.21 mi
8:59/mi
56:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:24:08
↑ 67↓ 78
20K· 12.43 mi
8:58/mi
1:52:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:56/mi
1:58:06
↑ 19↓ 370.5%
25K· 15.53 mi
9:19/mi
2:20:41
↑ 66↓ 880.2%
30K· 18.64 mi
10:07/mi
2:52:08
↑ 181↓ 1480.2%
20M
11:04/mi
3:07:11
↑ 64↓ 500.2%
21M
11:37/mi
3:18:48
↑ 106↓ 241.6%
35K· 21.75 mi
11:10/mi
3:27:09
↑ 17↓ 861.7%
23M
11:39/mi
3:41:44
↑ 23↓ 630.6%
24M
10:54/mi
3:52:38
↓ 821.3%
40K· 24.85 mi
11:05/mi
4:02:07
↓ 200.3%
25.2M
11:42/mi
4:06:09
↑ 13↓ 160.2%
Finish· 26.22 mi
10:04/mi
4:16:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:06
Pace9:01 /mi
2nd Half
Distance13.11 mi
Time2:18:18
Pace10:33 /mi
📊Positive Split: 17.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:3528:499:1728:49
9:17
-
10K
6.21 mi12:19:2956:439:0827:54
8:59
-0:18
15K
9.32 mi12:46:541:24:089:0227:25
8:49
-0:10
20K
12.43 mi13:14:461:52:009:0127:52
8:58
+0:09
Half
13.11 mi13:20:521:58:069:016:06
8:56
-0:02
25K
15.53 mi13:43:272:20:419:0322:35
9:19
+0:23
30K
18.64 mi14:14:542:52:089:1431:27
10:07
+0:48
20M
20.00 mi14:29:573:07:119:2215:03
11:04
+0:57
21M
21.00 mi14:41:343:18:489:2811:37
11:37
+0:33
35K
21.75 mi14:49:553:27:099:328:21
11:10
-0:27
23M
23.00 mi15:04:303:41:449:3814:35
11:39
+0:29
24M
24.00 mi15:15:243:52:389:4210:54
10:54
-0:45
40K
24.85 mi15:24:534:02:079:449:29
11:05
+0:11
25.2M
25.20 mi15:28:554:06:099:464:02
11:42
+0:37
Finish
26.22 mi15:39:104:16:249:4710:15
10:04
-1:38

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

8:49 /mi

Average Pace

9:47 /mi

Slowest Pace

11:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:20:41

55% of race

Time at Steady Pace

41:42

16% of race

Time at Slower Pace

1:14:01

29% of race

Average Pace: 9:47 /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 mi11:51:3528:499:1728:49
9:17
#23477
10K
6.21 mi12:19:2956:439:0827:54
8:59
#22928
15K
9.32 mi12:46:541:24:089:0227:25
8:49
#22396
20K
12.43 mi13:14:461:52:009:0127:52
8:58
#21991
Half
13.11 mi13:20:521:58:069:016:06
8:56
#21964
25K
15.53 mi13:43:272:20:419:0322:35
9:19
#21819
30K
18.64 mi14:14:542:52:089:1431:27
10:07
#21918
20M
20.00 mi14:29:573:07:119:2215:03
11:04
#22113
21M
21.00 mi14:41:343:18:489:2811:37
11:37
#22134
35K
21.75 mi14:49:553:27:099:328:21
11:10
#22260
23M
23.00 mi15:04:303:41:449:3814:35
11:39
#22417
24M
24.00 mi15:15:243:52:389:4210:54
10:54
#22458
40K
24.85 mi15:24:534:02:079:449:29
11:05
#22501
25.2M
25.20 mi15:28:554:06:099:464:02
11:42
#22501
Finish
26.22 mi15:39:104:16:249:4710:15
10:04
#22519
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23477139901399021143(Top 74%)13007(Top 81%)13007(Top 231%)
10K6.21 mi3.10 mi22928+54913753+23713753+23722293(Top 78%)13471(Top 84%)13471(Top 239%)
15K9.32 mi3.11 mi22396+53213531+22213531+22221143(Top 74%)13007(Top 81%)13007(Top 231%)
20K12.43 mi3.11 mi21991+40513336+19513336+19520810(Top 73%)12803(Top 79%)12803(Top 227%)
Half13.11 mi0.68 mi21964+2713327+913327+921558(Top 76%)13162(Top 82%)13162(Top 233%)
25K15.53 mi2.42 mi21819+14513250+7713250+7721237(Top 75%)12961(Top 80%)12961(Top 230%)
30K18.64 mi3.11 mi21918-9913281-3113281-3121971(Top 77%)13150(Top 82%)13150(Top 233%)
20M20.00 mi1.36 mi22113-19513352-7113352-7123738(Top 84%)13863(Top 86%)13863(Top 246%)
21M21.00 mi1.00 mi22134-2113332+2013332+2022842(Top 80%)13362(Top 83%)13362(Top 237%)
35K21.75 mi0.75 mi22260-12613376-4413376-4424528(Top 86%)14117(Top 88%)14117(Top 250%)
23M23.00 mi1.25 mi22417-15713405-2913405-2924502(Top 86%)14091(Top 87%)14091(Top 250%)
24M24.00 mi1.00 mi22458-4113410-513410-523761(Top 84%)13695(Top 85%)13695(Top 243%)
40K24.85 mi0.85 mi22501-4313407+313407+323332(Top 82%)13413(Top 83%)13413(Top 238%)
25.2M25.20 mi0.35 mi2250113402+513402+522537(Top 79%)13052(Top 81%)13052(Top 231%)
Finish26.22 mi1.02 mi22519-1813388+1413388+1423098(Top 81%)13326(Top 83%)13326(Top 236%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

21143

Males

13007

M18-39

13007

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22293

Males

13471

M18-39

13471

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

21143

Males

13007

M18-39

13007

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

20810

Males

12803

M18-39

12803

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21558

Males

13162

M18-39

13162

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

21237

Males

12961

M18-39

12961

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21971

Males

13150

M18-39

13150

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23738

Males

13863

M18-39

13863

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22842

Males

13362

M18-39

13362

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24528

Males

14117

M18-39

14117

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24502

Males

14091

M18-39

14091

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

23761

Males

13695

M18-39

13695

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23332

Males

13413

M18-39

13413

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22537

Males

13052

M18-39

13052

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

23098

Males

13326

M18-39

13326

Passing Analysis

Category:
Athletes Passed
2319
Passed By
1361
Net Change
+958
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23477
5K → 10K60354+549#23477#22928
10K → 15K55018+532#22928#22396
15K → 20K42116+405#22396#21991
20K → Half4619+27#21991#21964
Half → 25K22277+145#21964#21819
25K → 30K160259-99#21819#21918
30K → 20M45240-195#21918#22113
20M → 21M81102-21#22113#22134
21M → 35K15141-126#22134#22260
35K → 23M39196-157#22260#22417
23M → 24M4283-41#22417#22458
24M → 40K3376-43#22458#22501
40K → 25.2M19190#22501#22501
25.2M → Finish4361-18#22501#22519
TOTALS23191361+958
📊

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