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BOSTON MARATHON 2025

Zhangdong Liao

Bib: 5626•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
Masters (Masters Men)
#0 / 10463
Top 36%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:31
Rank: #4646
Start → 5K
20:31 | 6:36/mi
10K· 6.21 mi
40:55
Rank: #4388 (+258)
5K → 10K
20:24 | 6:34/mi
15K· 9.32 mi
1:01:20
Rank: #4259 (+129)
10K → 15K
20:25 | 6:34/mi
20K· 12.43 mi
1:22:16
Rank: #4331 (-72)
15K → 20K
20:56 | 6:44/mi
Half· 13.11 mi
1:26:54
Rank: #4398 (-67)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:45:24
Rank: #5582 (-1184)
Half → 25K
18:30 | 7:38/mi
30K· 18.64 mi
2:10:48
Rank: #6781 (-1199)
25K → 30K
25:24 | 8:11/mi
20M
2:22:59
Rank: #7392 (-611)
30K → 20M
12:11 | 8:58/mi
21M
2:31:58
Rank: #7652 (-260)
20M → 21M
8:59 | 8:59/mi
35K· 21.75 mi
2:38:29
Rank: #7952 (-300)
21M → 35K
6:31 | 8:43/mi
23M
2:49:33
Rank: #8390 (-438)
35K → 23M
11:04 | 8:50/mi
24M
2:57:54
Rank: #8630 (-240)
23M → 24M
8:21 | 8:21/mi
40K· 24.85 mi
3:06:34
Rank: #9299 (-669)
24M → 40K
8:40 | 10:08/mi
25.2M
3:09:47
Rank: #9358 (-59)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:18:42
Rank: #9736 (-378)
25.2M → Finish
8:55 | 8:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:54
Pace6:38 /mi
2nd Half
Distance13.11 mi
Time1:51:48
Pace8:32 /mi
📊Positive Split: 28.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3820:316:3620:31
6:36
-
10K
6.21 mi10:45:0240:556:3520:24
6:34
-0:02
15K
9.32 mi11:05:271:01:206:3520:25
6:34
0:00
20K
12.43 mi11:26:231:22:166:3720:56
6:44
+0:10
Half
13.11 mi11:31:011:26:546:384:38
6:47
+0:03
25K
15.53 mi11:49:311:45:246:4718:30
7:38
+0:51
30K
18.64 mi12:14:552:10:487:0125:24
8:11
+0:33
20M
20.00 mi12:27:062:22:597:0912:11
8:58
+0:47
21M
21.00 mi12:36:052:31:587:148:59
8:59
+0:01
35K
21.75 mi12:42:362:38:297:176:31
8:43
-0:16
23M
23.00 mi12:53:402:49:337:2211:04
8:50
+0:07
24M
24.00 mi13:02:012:57:547:258:21
8:21
-0:29
40K
24.85 mi13:10:413:06:347:308:40
10:08
+1:47
25.2M
25.20 mi13:13:543:09:477:323:13
9:20
-0:48
Finish
26.22 mi13:22:493:18:427:358:55
8:45
-0:35

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

6:34 /mi

Average Pace

7:35 /mi

Slowest Pace

10:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:24

53% of race

Time at Steady Pace

1:00:15

30% of race

Time at Slower Pace

33:03

17% of race

Average Pace: 7:35 /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 mi10:24:3820:316:3620:31
6:36
#4646
10K
6.21 mi10:45:0240:556:3520:24
6:34
#4388
15K
9.32 mi11:05:271:01:206:3520:25
6:34
#4259
20K
12.43 mi11:26:231:22:166:3720:56
6:44
#4331
Half
13.11 mi11:31:011:26:546:384:38
6:47
#4398
25K
15.53 mi11:49:311:45:246:4718:30
7:38
#5582
30K
18.64 mi12:14:552:10:487:0125:24
8:11
#6781
20M
20.00 mi12:27:062:22:597:0912:11
8:58
#7392
21M
21.00 mi12:36:052:31:587:148:59
8:59
#7652
35K
21.75 mi12:42:362:38:297:176:31
8:43
#7952
23M
23.00 mi12:53:402:49:337:2211:04
8:50
#8390
24M
24.00 mi13:02:012:57:547:258:21
8:21
#8630
40K
24.85 mi13:10:413:06:347:308:40
10:08
#9299
25.2M
25.20 mi13:13:543:09:477:323:13
9:20
#9358
Finish
26.22 mi13:22:493:18:427:358:55
8:45
#9736
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4646435843584047(Top 14%)3812(Top 24%)3812(Top 170%)
10K6.21 mi3.10 mi4388+2584127+2314127+2314210(Top 15%)3960(Top 25%)3960(Top 176%)
15K9.32 mi3.11 mi4259+1294006+1214006+1214047(Top 14%)3812(Top 24%)3812(Top 170%)
20K12.43 mi3.11 mi4331-724069-634069-634778(Top 17%)4423(Top 27%)4423(Top 197%)
Half13.11 mi0.68 mi4398-674128-594128-596142(Top 22%)5563(Top 35%)5563(Top 248%)
25K15.53 mi2.42 mi5582-11845129-10015129-100110972(Top 39%)8369(Top 52%)8369(Top 372%)
30K18.64 mi3.11 mi6781-11996041-9126041-91212618(Top 44%)8953(Top 56%)8953(Top 398%)
20M20.00 mi1.36 mi7392-6116455-4146455-41416580(Top 58%)10622(Top 66%)10622(Top 473%)
21M21.00 mi1.00 mi7652-2606584-1296584-12913365(Top 47%)9024(Top 56%)9024(Top 402%)
35K21.75 mi0.75 mi7952-3006752-1686752-16816694(Top 59%)10468(Top 65%)10468(Top 466%)
23M23.00 mi1.25 mi8390-4386982-2306982-23015293(Top 54%)9755(Top 61%)9755(Top 434%)
24M24.00 mi1.00 mi8630-2407093-1117093-11113537(Top 48%)8909(Top 55%)8909(Top 396%)
40K24.85 mi0.85 mi9299-6697433-3407433-34020874(Top 73%)12217(Top 76%)12217(Top 544%)
25.2M25.20 mi0.35 mi9358-597448-157448-1513513(Top 48%)8683(Top 54%)8683(Top 386%)
Finish26.22 mi1.02 mi9736-3787602-1547602-15417738(Top 62%)10733(Top 67%)10733(Top 478%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4047

Males

3812

M40-44

3812

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4210

Males

3960

M40-44

3960

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4047

Males

3812

M40-44

3812

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4778

Males

4423

M40-44

4423

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6142

Males

5563

M40-44

5563

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10972

Males

8369

M40-44

8369

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12618

Males

8953

M40-44

8953

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16580

Males

10622

M40-44

10622

20M→21M

20.0 - 21.0 mi

Top 47%
×8stories
+106ft-24ft

Overall

13365

Males

9024

M40-44

9024

21M→35K

21.0 - 21.8 mi

Top 59%
×7stories
+17ft-86ft

Overall

16694

Males

10468

M40-44

10468

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

15293

Males

9755

M40-44

9755

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

13537

Males

8909

M40-44

8909

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20874

Males

12217

M40-44

12217

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13513

Males

8683

M40-44

8683

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

17738

Males

10733

M40-44

10733

Passing Analysis

Category:
Athletes Passed
773
Passed By
5863
Net Change
-5090
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4646
5K → 10K32062+258#4646#4388
10K → 15K18051+129#4388#4259
15K → 20K77149-72#4259#4331
20K → Half471-67#4331#4398
Half → 25K61190-1184#4398#5582
25K → 30K261225-1199#5582#6781
30K → 20M19630-611#6781#7392
20M → 21M32292-260#7392#7652
21M → 35K12312-300#7652#7952
35K → 23M30468-438#7952#8390
23M → 24M27267-240#8390#8630
24M → 40K11680-669#8630#9299
40K → 25.2M2180-59#9299#9358
25.2M → Finish8386-378#9358#9736
TOTALS7735863-5090
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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