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BOSTON MARATHON 2025

Hao Zong

Bib: 1550•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 7%
Gender (Male)
#0 / 16105
Top 12%
Division (M18-39)
#0 / 5642
Top 29%
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
6:11/mi
19:12
↑ 97↓ 3451.5%
10K· 6.21 mi
6:10/mi
38:22
↑ 79↓ 1380.4%
15K· 9.32 mi
6:10/mi
57:32
↑ 67↓ 78
20K· 12.43 mi
6:15/mi
1:16:56
↑ 106↓ 860.1%
Half· 13.11 mi
6:14/mi
1:21:11
↑ 19↓ 370.5%
25K· 15.53 mi
6:19/mi
1:36:31
↑ 66↓ 880.2%
30K· 18.64 mi
6:33/mi
1:56:52
↑ 181↓ 1480.2%
20M
6:40/mi
2:05:56
↑ 64↓ 500.2%
21M
7:13/mi
2:13:09
↑ 106↓ 241.6%
35K· 21.75 mi
6:53/mi
2:18:18
↑ 17↓ 861.7%
23M
6:59/mi
2:27:03
↑ 23↓ 630.6%
24M
6:49/mi
2:33:52
↓ 821.3%
40K· 24.85 mi
6:48/mi
2:39:41
↓ 200.3%
25.2M
7:32/mi
2:42:17
↑ 13↓ 160.2%
Finish· 26.22 mi
6:44/mi
2:49:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:11
Pace6:12 /mi
2nd Half
Distance13.11 mi
Time1:27:58
Pace6:43 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5419:126:1119:12
6:11
-
10K
6.21 mi10:39:0438:226:1019:10
6:10
-0:01
15K
9.32 mi10:58:1457:326:1019:10
6:10
0:00
20K
12.43 mi11:17:381:16:566:1119:24
6:15
+0:05
Half
13.11 mi11:21:531:21:116:124:15
6:14
-0:01
25K
15.53 mi11:37:131:36:316:1315:20
6:19
+0:05
30K
18.64 mi11:57:341:56:526:1620:21
6:33
+0:14
20M
20.00 mi12:06:382:05:566:189:04
6:40
+0:07
21M
21.00 mi12:13:512:13:096:207:13
7:13
+0:33
35K
21.75 mi12:19:002:18:186:225:09
6:53
-0:20
23M
23.00 mi12:27:452:27:036:248:45
6:59
+0:06
24M
24.00 mi12:34:342:33:526:256:49
6:49
-0:10
40K
24.85 mi12:40:232:39:416:255:49
6:48
-0:01
25.2M
25.20 mi12:42:592:42:176:262:36
7:32
+0:44
Finish
26.22 mi12:49:512:49:096:276:52
6:44
-0:48

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

6:10 /mi

Average Pace

6:27 /mi

Slowest Pace

7:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:31

57% of race

Time at Steady Pace

48:55

29% of race

Time at Slower Pace

23:43

14% of race

Average Pace: 6:27 /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 mi10:19:5419:126:1119:12
6:11
#1743
10K
6.21 mi10:39:0438:226:1019:10
6:10
#1753
15K
9.32 mi10:58:1457:326:1019:10
6:10
#1727
20K
12.43 mi11:17:381:16:566:1119:24
6:15
#1721
Half
13.11 mi11:21:531:21:116:124:15
6:14
#1736
25K
15.53 mi11:37:131:36:316:1315:20
6:19
#1750
30K
18.64 mi11:57:341:56:526:1620:21
6:33
#1805
20M
20.00 mi12:06:382:05:566:189:04
6:40
#1816
21M
21.00 mi12:13:512:13:096:207:13
7:13
#1853
35K
21.75 mi12:19:002:18:186:225:09
6:53
#1921
23M
23.00 mi12:27:452:27:036:248:45
6:59
#1995
24M
24.00 mi12:34:342:33:526:256:49
6:49
#2012
40K
24.85 mi12:40:232:39:416:255:49
6:48
#2024
25.2M
25.20 mi12:42:592:42:176:262:36
7:32
#2032
Finish
26.22 mi12:49:512:49:096:276:52
6:44
#2105
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1743165516551691(Top 6%)1605(Top 10%)1605(Top 28%)
10K6.21 mi3.10 mi1753-101666-111666-111766(Top 6%)1679(Top 10%)1679(Top 30%)
15K9.32 mi3.11 mi1727+261642+241642+241691(Top 6%)1605(Top 10%)1605(Top 28%)
20K12.43 mi3.11 mi1721+61635+71635+71770(Top 6%)1682(Top 10%)1682(Top 30%)
Half13.11 mi0.68 mi1736-151649-141649-142111(Top 7%)2015(Top 13%)2015(Top 36%)
25K15.53 mi2.42 mi1750-141663-141663-141977(Top 7%)1881(Top 12%)1881(Top 33%)
30K18.64 mi3.11 mi1805-551719-561719-562191(Top 8%)2075(Top 13%)2075(Top 37%)
20M20.00 mi1.36 mi1816-111728-91728-92323(Top 8%)2193(Top 14%)2193(Top 39%)
21M21.00 mi1.00 mi1853-371762-341762-343182(Top 11%)2930(Top 18%)2930(Top 52%)
35K21.75 mi0.75 mi1921-681825-631825-634558(Top 16%)4036(Top 25%)4036(Top 72%)
23M23.00 mi1.25 mi1995-741895-701895-703654(Top 13%)3298(Top 20%)3298(Top 58%)
24M24.00 mi1.00 mi2012-171909-141909-143569(Top 13%)3188(Top 20%)3188(Top 57%)
40K24.85 mi0.85 mi2024-121920-111920-112827(Top 10%)2553(Top 16%)2553(Top 45%)
25.2M25.20 mi0.35 mi2032-81928-81928-83502(Top 12%)3046(Top 19%)3046(Top 54%)
Finish26.22 mi1.02 mi2105-731997-691997-694079(Top 14%)3482(Top 22%)3482(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21story building
+97ft-345ft

Overall

1691

Males

1605

M18-39

1605

5K→10K

3.1 - 6.2 mi

Top 6%
×5story building
+79ft-138ft

Overall

1766

Males

1679

M18-39

1679

10K→15K

6.2 - 9.3 mi

Top 6%
×3story building
+67ft-78ft

Overall

1691

Males

1605

M18-39

1605

15K→20K

9.3 - 12.4 mi

Top 6%
×5story building
+106ft-86ft

Overall

1770

Males

1682

M18-39

1682

20K→Half

12.4 - 13.1 mi

Top 7%
×2story building
+19ft-37ft

Overall

2111

Males

2015

M18-39

2015

Half→25K

13.1 - 15.5 mi

Top 7%
×4story building
+66ft-88ft

Overall

1977

Males

1881

M18-39

1881

25K→30K

15.5 - 18.6 mi

Top 8%
×9story building
+181ft-148ft

Overall

2191

Males

2075

M18-39

2075

30K→20M

18.6 - 20.0 mi

Top 8%
×5story building
+64ft-50ft

Overall

2323

Males

2193

M18-39

2193

20M→21M

20.0 - 21.0 mi

Top 11%
×8story building
+106ft-24ft

Overall

3182

Males

2930

M18-39

2930

21M→35K

21.0 - 21.8 mi

Top 16%
×7story building
+17ft-86ft

Overall

4558

Males

4036

M18-39

4036

35K→23M

21.8 - 23.0 mi

Top 13%
×5story building
+23ft-63ft

Overall

3654

Males

3298

M18-39

3298

23M→24M

23.0 - 24.0 mi

Top 13%
×6story building
+12ft-82ft

Overall

3569

Males

3188

M18-39

3188

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2827

Males

2553

M18-39

2553

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3502

Males

3046

M18-39

3046

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2story building
+22ft-21ft

Overall

4079

Males

3482

M18-39

3482

Passing Analysis

Category:
Athletes Passed
491
Passed By
853
Net Change
-362
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1743
5K → 10K7888-10#1743#1753
10K → 15K7246+26#1753#1727
15K → 20K5448+6#1727#1721
20K → Half217-15#1721#1736
Half → 25K4963-14#1736#1750
25K → 30K57112-55#1750#1805
30K → 20M3445-11#1805#1816
20M → 21M2865-37#1816#1853
21M → 35K1381-68#1853#1921
35K → 23M27101-74#1921#1995
23M → 24M3249-17#1995#2012
24M → 40K2638-12#2012#2024
40K → 25.2M917-8#2024#2032
25.2M → Finish1083-73#2032#2105
TOTALS491853-362
📊

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