Boston Marathon logo
BOSTON MARATHON 2025

Weiheng Chang

Bib: 17986•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 40%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 43%
Division (M55-59)
#0 / 1648
Top 26%
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
7:20/mi
22:47
↑ 97↓ 3451.5%
10K· 6.21 mi
7:38/mi
46:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:45/mi
1:10:35
↑ 67↓ 78
20K· 12.43 mi
7:44/mi
1:34:38
↑ 106↓ 860.1%
Half· 13.11 mi
7:31/mi
1:39:46
↑ 19↓ 370.5%
25K· 15.53 mi
7:50/mi
1:58:46
↑ 66↓ 880.2%
30K· 18.64 mi
8:08/mi
2:24:02
↑ 181↓ 1480.2%
20M
8:04/mi
2:35:00
↑ 64↓ 500.2%
21M
8:36/mi
2:43:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:49:12
↑ 17↓ 861.7%
23M
8:02/mi
2:59:16
↑ 23↓ 630.6%
24M
7:47/mi
3:07:03
↓ 821.3%
40K· 24.85 mi
7:49/mi
3:13:44
↓ 200.3%
25.2M
8:33/mi
3:16:41
↑ 13↓ 160.2%
Finish· 26.22 mi
7:29/mi
3:24:19
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:46
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:44:33
Pace7:59 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:12:5222:477:2022:47
7:20
-
10K
6.21 mi11:36:3546:307:2923:43
7:38
+0:18
15K
9.32 mi12:00:401:10:357:3424:05
7:45
+0:07
20K
12.43 mi12:24:431:34:387:3724:03
7:44
-0:01
Half
13.11 mi12:29:511:39:467:375:08
7:31
-0:13
25K
15.53 mi12:48:511:58:467:3919:00
7:50
+0:19
30K
18.64 mi13:14:072:24:027:4425:16
8:08
+0:18
20M
20.00 mi13:25:052:35:007:4510:58
8:04
-0:04
21M
21.00 mi13:33:412:43:367:478:36
8:36
+0:32
35K
21.75 mi13:39:172:49:127:475:36
7:29
-1:07
23M
23.00 mi13:49:212:59:167:4810:04
8:02
+0:33
24M
24.00 mi13:57:083:07:037:487:47
7:47
-0:15
40K
24.85 mi14:03:493:13:447:486:41
7:49
+0:02
25.2M
25.20 mi14:06:463:16:417:482:57
8:33
+0:44
Finish
26.22 mi14:14:243:24:197:487:38
7:29
-1:04

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

7:20 /mi

Average Pace

7:48 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:30

82% of race

Time at Steady Pace

36:49

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:48 /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 mi11:12:5222:477:2022:47
7:20
#10692
10K
6.21 mi11:36:3546:307:2923:43
7:38
#11976
15K
9.32 mi12:00:401:10:357:3424:05
7:45
#12611
20K
12.43 mi12:24:431:34:387:3724:03
7:44
#12608
Half
13.11 mi12:29:511:39:467:375:08
7:31
#12572
25K
15.53 mi12:48:511:58:467:3919:00
7:50
#12556
30K
18.64 mi13:14:072:24:027:4425:16
8:08
#12479
20M
20.00 mi13:25:052:35:007:4510:58
8:04
#12319
21M
21.00 mi13:33:412:43:367:478:36
8:36
#12221
35K
21.75 mi13:39:172:49:127:475:36
7:29
#12065
23M
23.00 mi13:49:212:59:167:4810:04
8:02
#11920
24M
24.00 mi13:57:083:07:037:487:47
7:47
#11796
40K
24.85 mi14:03:493:13:447:486:41
7:49
#11639
25.2M
25.20 mi14:06:463:16:417:482:57
8:33
#11578
Finish
26.22 mi14:14:243:24:197:487:38
7:29
#11444
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi106928534853413932(Top 49%)9913(Top 62%)9913(Top 602%)
10K6.21 mi3.10 mi11976-12849144-6109144-61013293(Top 47%)9699(Top 60%)9699(Top 589%)
15K9.32 mi3.11 mi12611-6359414-2709414-27013932(Top 49%)9913(Top 62%)9913(Top 602%)
20K12.43 mi3.11 mi12608+39361+539361+5312740(Top 45%)9294(Top 58%)9294(Top 564%)
Half13.11 mi0.68 mi12572+369342+199342+1911854(Top 42%)8962(Top 56%)8962(Top 544%)
25K15.53 mi2.42 mi12556+169299+439299+4312612(Top 44%)9118(Top 57%)9118(Top 553%)
30K18.64 mi3.11 mi12479+779189+1109189+11012315(Top 43%)8822(Top 55%)8822(Top 535%)
20M20.00 mi1.36 mi12319+1609082+1079082+10710878(Top 38%)7971(Top 49%)7971(Top 484%)
21M21.00 mi1.00 mi12221+988999+838999+8311077(Top 39%)7910(Top 49%)7910(Top 480%)
35K21.75 mi0.75 mi12065+1568904+958904+958518(Top 30%)6610(Top 41%)6610(Top 401%)
23M23.00 mi1.25 mi11920+1458796+1088796+10810313(Top 36%)7397(Top 46%)7397(Top 449%)
24M24.00 mi1.00 mi11796+1248696+1008696+1009676(Top 34%)7008(Top 44%)7008(Top 425%)
40K24.85 mi0.85 mi11639+1578593+1038593+1038881(Top 31%)6463(Top 40%)6463(Top 392%)
25.2M25.20 mi0.35 mi11578+618548+458548+459085(Top 32%)6504(Top 40%)6504(Top 395%)
Finish26.22 mi1.02 mi11444+1348439+1098439+1099108(Top 32%)6502(Top 40%)6502(Top 395%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13932

Males

9913

M55-59

9913

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

13293

Males

9699

M55-59

9699

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13932

Males

9913

M55-59

9913

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

12740

Males

9294

M55-59

9294

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11854

Males

8962

M55-59

8962

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12612

Males

9118

M55-59

9118

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

12315

Males

8822

M55-59

8822

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10878

Males

7971

M55-59

7971

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

11077

Males

7910

M55-59

7910

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8518

Males

6610

M55-59

6610

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

10313

Males

7397

M55-59

7397

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9676

Males

7008

M55-59

7008

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8881

Males

6463

M55-59

6463

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9085

Males

6504

M55-59

6504

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

9108

Males

6502

M55-59

6502

Passing Analysis

Category:
Athletes Passed
1978
Passed By
2730
Net Change
-752
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10692
5K → 10K231307-1284#10692#11976
10K → 15K50685-635#11976#12611
15K → 20K198195+3#12611#12608
20K → Half5014+36#12608#12572
Half → 25K159143+16#12572#12556
25K → 30K272195+77#12556#12479
30K → 20M19434+160#12479#12319
20M → 21M15355+98#12319#12221
21M → 35K1604+156#12221#12065
35K → 23M18035+145#12065#11920
23M → 24M14016+124#11920#11796
24M → 40K16811+157#11796#11639
40K → 25.2M7110+61#11639#11578
25.2M → Finish16026+134#11578#11444
TOTALS19782730-752
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing