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BOSTON MARATHON 2025

Liang Zhou

Bib: 4380•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 21%
Gender (Male)
#0 / 16105
Top 33%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:35
Rank: #2461
Start → 5K
19:35 | 6:18/mi
10K· 6.21 mi
39:32
Rank: #2803 (-342)
5K → 10K
19:57 | 6:25/mi
15K· 9.32 mi
59:56
Rank: #3217 (-414)
10K → 15K
20:24 | 6:34/mi
20K· 12.43 mi
1:21:10
Rank: #3717 (-500)
15K → 20K
21:14 | 6:50/mi
Half· 13.11 mi
1:25:37
Rank: #3718 (-1)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:42:21
Rank: #3922 (-204)
Half → 25K
16:44 | 6:54/mi
30K· 18.64 mi
2:05:15
Rank: #4475 (-553)
25K → 30K
22:54 | 7:22/mi
20M
2:15:34
Rank: #4768 (-293)
30K → 20M
10:19 | 7:36/mi
21M
2:23:49
Rank: #5009 (-241)
20M → 21M
8:15 | 8:15/mi
35K· 21.75 mi
2:29:24
Rank: #5153 (-144)
21M → 35K
5:35 | 7:28/mi
23M
2:39:11
Rank: #5323 (-170)
35K → 23M
9:47 | 7:49/mi
24M
2:47:12
Rank: #5493 (-170)
23M → 24M
8:01 | 8:01/mi
40K· 24.85 mi
2:54:21
Rank: #5657 (-164)
24M → 40K
7:09 | 8:22/mi
25.2M
2:57:29
Rank: #5717 (-60)
40K → 25.2M
3:08 | 9:05/mi
Finish· 26.22 mi
3:05:41
Rank: #5899 (-182)
25.2M → Finish
8:12 | 8:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:37
Pace6:32 /mi
2nd Half
Distance13.11 mi
Time1:40:04
Pace7:38 /mi
📊Positive Split: 16.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:2619:356:1819:35
6:18
-
10K
6.21 mi10:42:2339:326:2219:57
6:25
+0:07
15K
9.32 mi11:02:4759:566:2620:24
6:34
+0:09
20K
12.43 mi11:24:011:21:106:3221:14
6:50
+0:16
Half
13.11 mi11:28:281:25:376:324:27
6:31
-0:19
25K
15.53 mi11:45:121:42:216:3516:44
6:54
+0:23
30K
18.64 mi12:08:062:05:156:4322:54
7:22
+0:28
20M
20.00 mi12:18:252:15:346:4710:19
7:36
+0:14
21M
21.00 mi12:26:402:23:496:518:15
8:15
+0:39
35K
21.75 mi12:32:152:29:246:525:35
7:28
-0:47
23M
23.00 mi12:42:022:39:116:559:47
7:49
+0:21
24M
24.00 mi12:50:032:47:126:588:01
8:01
+0:12
40K
24.85 mi12:57:122:54:217:017:09
8:22
+0:21
25.2M
25.20 mi13:00:202:57:297:033:08
9:05
+0:43
Finish
26.22 mi13:08:323:05:417:058:12
8:03
-1:02

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

6:18 /mi

Average Pace

7:05 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:21

55% of race

Time at Steady Pace

48:35

26% of race

Time at Slower Pace

34:45

19% of race

Average Pace: 7:05 /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 mi10:22:2619:356:1819:35
6:18
#2461
10K
6.21 mi10:42:2339:326:2219:57
6:25
#2803
15K
9.32 mi11:02:4759:566:2620:24
6:34
#3217
20K
12.43 mi11:24:011:21:106:3221:14
6:50
#3717
Half
13.11 mi11:28:281:25:376:324:27
6:31
#3718
25K
15.53 mi11:45:121:42:216:3516:44
6:54
#3922
30K
18.64 mi12:08:062:05:156:4322:54
7:22
#4475
20M
20.00 mi12:18:252:15:346:4710:19
7:36
#4768
21M
21.00 mi12:26:402:23:496:518:15
8:15
#5009
35K
21.75 mi12:32:152:29:246:525:35
7:28
#5153
23M
23.00 mi12:42:022:39:116:559:47
7:49
#5323
24M
24.00 mi12:50:032:47:126:588:01
8:01
#5493
40K
24.85 mi12:57:122:54:217:017:09
8:22
#5657
25.2M
25.20 mi13:00:202:57:297:033:08
9:05
#5717
Finish
26.22 mi13:08:323:05:417:058:12
8:03
#5899
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2461234423443987(Top 14%)3757(Top 23%)3757(Top 67%)
10K6.21 mi3.10 mi2803-3422670-3262670-3263187(Top 11%)3032(Top 19%)3032(Top 54%)
15K9.32 mi3.11 mi3217-4143058-3883058-3883987(Top 14%)3757(Top 23%)3757(Top 67%)
20K12.43 mi3.11 mi3717-5003511-4533511-4535633(Top 20%)5136(Top 32%)5136(Top 91%)
Half13.11 mi0.68 mi3718-1351135113833(Top 13%)3613(Top 22%)3613(Top 64%)
25K15.53 mi2.42 mi3922-2043696-1853696-1855677(Top 20%)5139(Top 32%)5139(Top 91%)
30K18.64 mi3.11 mi4475-5534178-4824178-4826861(Top 24%)5883(Top 37%)5883(Top 104%)
20M20.00 mi1.36 mi4768-2934415-2374415-2377581(Top 27%)6183(Top 38%)6183(Top 110%)
21M21.00 mi1.00 mi5009-2414609-1944609-1948835(Top 31%)6713(Top 42%)6713(Top 119%)
35K21.75 mi0.75 mi5153-1444724-1154724-1158294(Top 29%)6458(Top 40%)6458(Top 114%)
23M23.00 mi1.25 mi5323-1704852-1284852-1288642(Top 30%)6508(Top 40%)6508(Top 115%)
24M24.00 mi1.00 mi5493-1704975-1234975-12311304(Top 40%)7795(Top 48%)7795(Top 138%)
40K24.85 mi0.85 mi5657-1645086-1115086-11112493(Top 44%)8263(Top 51%)8263(Top 146%)
25.2M25.20 mi0.35 mi5717-605123-375123-3712150(Top 43%)8034(Top 50%)8034(Top 142%)
Finish26.22 mi1.02 mi5899-1825246-1235246-12313155(Top 46%)8578(Top 53%)8578(Top 152%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3987

Males

3757

M18-39

3757

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

3187

Males

3032

M18-39

3032

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3987

Males

3757

M18-39

3757

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5633

Males

5136

M18-39

5136

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3833

Males

3613

M18-39

3613

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5677

Males

5139

M18-39

5139

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6861

Males

5883

M18-39

5883

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7581

Males

6183

M18-39

6183

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8835

Males

6713

M18-39

6713

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8294

Males

6458

M18-39

6458

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8642

Males

6508

M18-39

6508

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

11304

Males

7795

M18-39

7795

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12493

Males

8263

M18-39

8263

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12150

Males

8034

M18-39

8034

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

13155

Males

8578

M18-39

8578

Passing Analysis

Category:
Athletes Passed
318
Passed By
3756
Net Change
-3438
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2461
5K → 10K28370-342#2461#2803
10K → 15K12426-414#2803#3217
15K → 20K18518-500#3217#3717
20K → Half1718-1#3717#3718
Half → 25K29233-204#3718#3922
25K → 30K41594-553#3922#4475
30K → 20M18311-293#4475#4768
20M → 21M22263-241#4768#5009
21M → 35K20164-144#5009#5153
35K → 23M47217-170#5153#5323
23M → 24M12182-170#5323#5493
24M → 40K17181-164#5493#5657
40K → 25.2M1878-60#5657#5717
25.2M → Finish19201-182#5717#5899
TOTALS3183756-3438
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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