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BOSTON MARATHON 2025

Hung Ju Chang

Bib: 13209 M TW

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:36/mi
23:37
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:27/mi
49:53
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:38/mi
1:16:41
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:58/mi
1:44:32
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:17/mi
1:50:11
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:13/mi
2:12:33
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:54/mi
2:43:19
↑ 181↓ 1480.2%
138 ft elev
20M
9:48/mi
2:56:38
↑ 64↓ 500.2%
148 ft elev
21M
10:30/mi
3:07:08
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:37/mi
3:14:20
↑ 17↓ 861.7%
156 ft elev
23M
9:57/mi
3:26:47
↑ 23↓ 630.6%
116 ft elev
24M
10:02/mi
3:36:49
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:00/mi
3:45:22
↓ 200.3%
20 ft elev
25.2M
11:01/mi
3:49:10
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:39/mi
3:59:00
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:50:118:24 /mi⚡ faster
2nd Half
2:08:499:50 /mi+16.9%
Positive split — 16.9% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:4123:377:3623:37
7:36
-
10K
6.21 mi11:39:5749:538:0226:16
8:27
+0:51
15K
9.32 mi12:06:451:16:418:1426:48
8:38
+0:11
20K
12.43 mi12:34:361:44:328:2527:51
8:58
+0:20
Half
13.11 mi12:40:151:50:118:245:39
8:17
-0:41
25K
15.53 mi13:02:372:12:338:3222:22
9:13
+0:56
30K
18.64 mi13:33:232:43:198:4630:46
9:54
+0:41
20M
20.00 mi13:46:422:56:388:5013:19
9:48
-0:06
21M
21.00 mi13:57:123:07:088:5510:30
10:30
+0:42
35K
21.75 mi14:04:243:14:208:567:12
9:37
-0:53
23M
23.00 mi14:16:513:26:478:5912:27
9:57
+0:20
24M
24.00 mi14:26:533:36:499:0210:02
10:02
+0:05
40K
24.85 mi14:35:263:45:229:048:33
10:00
-0:02
25.2M
25.20 mi14:39:143:49:109:063:48
11:01
+1:01
Finish
26.22 mi14:49:043:59:009:079:50
9:39
-1:22

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

7:36 /mi

Average Pace

9:07 /mi

Slowest Pace

11:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

1:50:11

46% of race

Time at Steady Pace

1:54:31

48% of race

Time at Slower Pace

14:18

6% of race

Average Pace: 9:07 /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 mi11:13:4123:377:3623:37
7:36
#13134
10K
6.21 mi11:39:5749:538:0226:16
8:27
#16741
15K
9.32 mi12:06:451:16:418:1426:48
8:38
#17935
20K
12.43 mi12:34:361:44:328:2527:51
8:58
#18726
Half
13.11 mi12:40:151:50:118:245:39
8:17
#18669
25K
15.53 mi13:02:372:12:338:3222:22
9:13
#19113
30K
18.64 mi13:33:232:43:198:4630:46
9:54
#19655
20M
20.00 mi13:46:422:56:388:5013:19
9:48
#19718
21M
21.00 mi13:57:123:07:088:5510:30
10:30
#19753
35K
21.75 mi14:04:243:14:208:567:12
9:37
#19805
23M
23.00 mi14:16:513:26:478:5912:27
9:57
#19861
24M
24.00 mi14:26:533:36:499:0210:02
10:02
#19972
40K
24.85 mi14:35:263:45:229:048:33
10:00
#20000
25.2M
25.20 mi14:39:143:49:109:063:48
11:01
#20027
Finish
26.22 mi14:49:043:59:009:079:50
9:39
#20159
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi1313497119711200601253412534
10K6.21 mi3.10 mi16741-360711114-140311114-1403195311228612286
15K9.32 mi3.11 mi17935-119411599-48511599-485200601253412534
20K12.43 mi3.11 mi18726-79111925-32611925-326207801278812788
Half13.11 mi0.68 mi18669+5711898+2711898+27178151156011560
25K15.53 mi2.42 mi19113-44412081-18312081-183208631279312793
30K18.64 mi3.11 mi19655-54212274-19312274-193213041284912849
20M20.00 mi1.36 mi19718-6312281-712281-7202921227912279
21M21.00 mi1.00 mi19753-3512269+1212269+12200071204012040
35K21.75 mi0.75 mi19805-5212274-512274-5207501232612326
23M23.00 mi1.25 mi19861-5612263+1112263+11202941204812048
24M24.00 mi1.00 mi19972-11112292-2912292-29214541256512565
40K24.85 mi0.85 mi20000-2812286+612286+6204561202112021
25.2M25.20 mi0.35 mi20027-2712289-312289-3206771212412124
Finish26.22 mi1.02 mi20159-13212342-5312342-53217091263512635

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20060

Males

12534

M55-59

12534

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19531

Males

12286

M55-59

12286

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20060

Males

12534

M55-59

12534

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

20780

Males

12788

M55-59

12788

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17815

Males

11560

M55-59

11560

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

20863

Males

12793

M55-59

12793

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21304

Males

12849

M55-59

12849

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20292

Males

12279

M55-59

12279

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

20007

Males

12040

M55-59

12040

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

20750

Males

12326

M55-59

12326

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

20294

Males

12048

M55-59

12048

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

21454

Males

12565

M55-59

12565

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20456

Males

12021

M55-59

12021

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

20677

Males

12124

M55-59

12124

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

21709

Males

12635

M55-59

12635

Passing Analysis

Category:
Athletes Passed
717
Passed By
7742
Net Change
-7025
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13134
5K → 10K83615-3607#13134#16741
10K → 15K241218-1194#16741#17935
15K → 20K51842-791#17935#18726
20K → Half7114+57#18726#18669
Half → 25K72516-444#18669#19113
25K → 30K93635-542#19113#19655
30K → 20M78141-63#19655#19718
20M → 21M91126-35#19718#19753
21M → 35K2981-52#19753#19805
35K → 23M72128-56#19805#19861
23M → 24M37148-111#19861#19972
24M → 40K4977-28#19972#20000
40K → 25.2M1845-27#20000#20027
25.2M → Finish24156-132#20027#20159
TOTALS7177742-7025

Passing Charts

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