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BOSTON MARATHON 2025

Chiung Yu

Bib: 31154•M

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
7:03/mi
21:54
↑ 97↓ 3451.5%
10K· 6.21 mi
6:31/mi
42:09
↑ 79↓ 1380.4%
15K· 9.32 mi
7:06/mi
1:04:12
↑ 67↓ 78
20K· 12.43 mi
6:46/mi
1:25:12
↑ 106↓ 860.1%
Half· 13.11 mi
7:05/mi
1:30:02
↑ 19↓ 370.5%
25K· 15.53 mi
8:08/mi
1:49:45
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:18:36
↑ 181↓ 1480.2%
20M
10:40/mi
2:33:06
↑ 64↓ 500.2%
21M
9:15/mi
2:42:21
↑ 106↓ 241.6%
35K· 21.75 mi
8:41/mi
2:48:51
↑ 17↓ 861.7%
23M
10:09/mi
3:01:34
↑ 23↓ 630.6%
24M
15:37/mi
3:17:11
↓ 821.3%
40K· 24.85 mi
10:05/mi
3:25:48
↓ 200.3%
25.2M
10:09/mi
3:29:18
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:37:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:02
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time2:07:45
Pace9:45 /mi
📊Positive Split: 41.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:2721:547:0321:54
7:03
-
10K
6.21 mi12:03:4242:096:4720:15
6:31
-0:32
15K
9.32 mi12:25:451:04:126:5322:03
7:06
+0:35
20K
12.43 mi12:46:451:25:126:5121:00
6:46
-0:20
Half
13.11 mi12:51:351:30:026:524:50
7:05
+0:19
25K
15.53 mi13:11:181:49:457:0419:43
8:08
+1:03
30K
18.64 mi13:40:092:18:367:2628:51
9:17
+1:09
20M
20.00 mi13:54:392:33:067:3914:30
10:40
+1:23
21M
21.00 mi14:03:542:42:217:449:15
9:15
-1:25
35K
21.75 mi14:10:242:48:517:466:30
8:41
-0:34
23M
23.00 mi14:23:073:01:347:5412:43
10:09
+1:28
24M
24.00 mi14:38:443:17:118:1315:37
15:37
+5:28
40K
24.85 mi14:47:213:25:488:178:37
10:05
-5:32
25.2M
25.20 mi14:50:513:29:188:183:30
10:09
+0:04
Finish
26.22 mi14:59:203:37:478:198:29
8:19
-1:50

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

6:31 /mi

Average Pace

8:19 /mi

Slowest Pace

15:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:02

41% of race

Time at Steady Pace

1:12:48

33% of race

Time at Slower Pace

54:57

25% of race

Average Pace: 8:18 /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 mi11:43:2721:547:0321:54
7:03
#8215
10K
6.21 mi12:03:4242:096:4720:15
6:31
#6143
15K
9.32 mi12:25:451:04:126:5322:03
7:06
#6985
20K
12.43 mi12:46:451:25:126:5121:00
6:46
#6458
Half
13.11 mi12:51:351:30:026:524:50
7:05
#6577
25K
15.53 mi13:11:181:49:457:0419:43
8:08
#7698
30K
18.64 mi13:40:092:18:367:2628:51
9:17
#10012
20M
20.00 mi13:54:392:33:067:3914:30
10:40
#11513
21M
21.00 mi14:03:542:42:217:449:15
9:15
#11739
35K
21.75 mi14:10:242:48:517:466:30
8:41
#11924
23M
23.00 mi14:23:073:01:347:5412:43
10:09
#12716
24M
24.00 mi14:38:443:17:118:1315:37
15:37
#14994
40K
24.85 mi14:47:213:25:488:178:37
10:05
#15313
25.2M
25.20 mi14:50:513:29:188:183:30
10:09
#15350
Finish
26.22 mi14:59:203:37:478:198:29
8:19
#15328
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8215713771378318(Top 29%)7131(Top 44%)7131(Top 126%)
10K6.21 mi3.10 mi6143+20725631+15065631+15063881(Top 14%)3658(Top 23%)3658(Top 65%)
15K9.32 mi3.11 mi6985-8426275-6446275-6448318(Top 29%)7131(Top 44%)7131(Top 126%)
20K12.43 mi3.11 mi6458+5275846+4295846+4294929(Top 17%)4557(Top 28%)4557(Top 81%)
Half13.11 mi0.68 mi6577-1195941-955941-958200(Top 29%)7039(Top 44%)7039(Top 125%)
25K15.53 mi2.42 mi7698-11216743-8026743-80214831(Top 52%)10132(Top 63%)10132(Top 180%)
30K18.64 mi3.11 mi10012-23148028-12858028-128519036(Top 67%)11845(Top 74%)11845(Top 210%)
20M20.00 mi1.36 mi11513-15018706-6788706-67822867(Top 81%)13458(Top 84%)13458(Top 239%)
21M21.00 mi1.00 mi11739-2268779-738779-7314878(Top 52%)9733(Top 60%)9733(Top 173%)
35K21.75 mi0.75 mi11924-1858842-638842-6316578(Top 58%)10426(Top 65%)10426(Top 185%)
23M23.00 mi1.25 mi12716-7929173-3319173-33120973(Top 74%)12374(Top 77%)12374(Top 219%)
24M24.00 mi1.00 mi14994-227810153-98010153-98028166(Top 99%)15933(Top 99%)15933(Top 282%)
40K24.85 mi0.85 mi15313-31910249-9610249-9620687(Top 73%)12127(Top 75%)12127(Top 215%)
25.2M25.20 mi0.35 mi15350-3710252-310252-317625(Top 62%)10648(Top 66%)10648(Top 189%)
Finish26.22 mi1.02 mi15328+2210225+2710225+2715055(Top 53%)9505(Top 59%)9505(Top 168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

8318

Males

7131

M18-39

7131

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3881

Males

3658

M18-39

3658

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

8318

Males

7131

M18-39

7131

15K→20K

9.3 - 12.4 mi

Top 17%
×5story building
+106ft-86ft

Overall

4929

Males

4557

M18-39

4557

20K→Half

12.4 - 13.1 mi

Top 29%
×2story building
+19ft-37ft

Overall

8200

Males

7039

M18-39

7039

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

14831

Males

10132

M18-39

10132

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

19036

Males

11845

M18-39

11845

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

22867

Males

13458

M18-39

13458

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14878

Males

9733

M18-39

9733

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

16578

Males

10426

M18-39

10426

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

20973

Males

12374

M18-39

12374

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

28166

Males

15933

M18-39

15933

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20687

Males

12127

M18-39

12127

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17625

Males

10648

M18-39

10648

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15055

Males

9505

M18-39

9505

Passing Analysis

Category:
Athletes Passed
2854
Passed By
9965
Net Change
-7113
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8215
5K → 10K20720+2072#8215#6143
10K → 15K22864-842#6143#6985
15K → 20K5325+527#6985#6458
20K → Half4123-119#6458#6577
Half → 25K71128-1121#6577#7698
25K → 30K122325-2314#7698#10012
30K → 20M101510-1501#10012#11513
20M → 21M51277-226#11513#11739
21M → 35K22207-185#11739#11924
35K → 23M23815-792#11924#12716
23M → 24M12279-2278#12716#14994
24M → 40K16335-319#14994#15313
40K → 25.2M1956-37#15313#15350
25.2M → Finish6341+22#15350#15328
TOTALS28549965-7113
📊

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