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BOSTON MARATHON 2025

Chang Liu

Bib: 13011•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
7:40/mi
23:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
47:36
↑ 79↓ 1380.4%
15K· 9.32 mi
7:53/mi
1:12:07
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:37:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:43:15
↑ 19↓ 370.5%
25K· 15.53 mi
8:37/mi
2:04:08
↑ 66↓ 880.2%
30K· 18.64 mi
9:06/mi
2:32:25
↑ 181↓ 1480.2%
20M
8:37/mi
2:44:08
↑ 64↓ 500.2%
21M
8:49/mi
2:52:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
2:59:22
↑ 17↓ 861.7%
23M
8:42/mi
3:10:15
↑ 23↓ 630.6%
24M
8:24/mi
3:18:39
↓ 821.3%
40K· 24.85 mi
8:37/mi
3:26:01
↓ 200.3%
25.2M
9:08/mi
3:29:10
↑ 13↓ 160.2%
Finish· 26.22 mi
8:05/mi
3:37:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:15
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:54:09
Pace8:42 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:4223:487:4023:48
7:40
-
10K
6.21 mi11:17:3047:367:4023:48
7:40
0:00
15K
9.32 mi11:42:011:12:077:4424:31
7:53
+0:13
20K
12.43 mi12:07:451:37:517:5225:44
8:17
+0:24
Half
13.11 mi12:13:091:43:157:535:24
7:55
-0:22
25K
15.53 mi12:34:022:04:087:5920:53
8:37
+0:42
30K
18.64 mi13:02:192:32:258:1128:17
9:06
+0:29
20M
20.00 mi13:14:022:44:088:1211:43
8:37
-0:29
21M
21.00 mi13:22:512:52:578:148:49
8:49
+0:12
35K
21.75 mi13:29:162:59:228:156:25
8:35
-0:14
23M
23.00 mi13:40:093:10:158:1610:53
8:42
+0:07
24M
24.00 mi13:48:333:18:398:178:24
8:24
-0:18
40K
24.85 mi13:55:553:26:018:177:22
8:37
+0:13
25.2M
25.20 mi13:59:043:29:108:183:09
9:08
+0:31
Finish
26.22 mi14:07:183:37:248:188:14
8:05
-1:03

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

7:40 /mi

Average Pace

8:18 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:53

55% of race

Time at Steady Pace

1:06:05

30% of race

Time at Slower Pace

31:26

14% of race

Average Pace: 8:17 /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 mi10:53:4223:487:4023:48
7:40
#13599
10K
6.21 mi11:17:3047:367:4023:48
7:40
#13590
15K
9.32 mi11:42:011:12:077:4424:31
7:53
#14083
20K
12.43 mi12:07:451:37:517:5225:44
8:17
#14868
Half
13.11 mi12:13:091:43:157:535:24
7:55
#14888
25K
15.53 mi12:34:022:04:087:5920:53
8:37
#15471
30K
18.64 mi13:02:192:32:258:1128:17
9:06
#16056
20M
20.00 mi13:14:022:44:088:1211:43
8:37
#15908
21M
21.00 mi13:22:512:52:578:148:49
8:49
#15652
35K
21.75 mi13:29:162:59:228:156:25
8:35
#15633
23M
23.00 mi13:40:093:10:158:1610:53
8:42
#15527
24M
24.00 mi13:48:333:18:398:178:24
8:24
#15448
40K
24.85 mi13:55:553:26:018:177:22
8:37
#15370
25.2M
25.20 mi13:59:043:29:108:183:09
9:08
#15319
Finish
26.22 mi14:07:183:37:248:188:14
8:05
#15243
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi135999907990715153(Top 53%)10441(Top 65%)10441(Top 523%)
10K6.21 mi3.10 mi13590+99851+569851+5613540(Top 48%)9817(Top 61%)9817(Top 492%)
15K9.32 mi3.11 mi14083-49310019-16810019-16815153(Top 53%)10441(Top 65%)10441(Top 523%)
20K12.43 mi3.11 mi14868-78510309-29010309-29016823(Top 59%)11096(Top 69%)11096(Top 556%)
Half13.11 mi0.68 mi14888-2010313-410313-415168(Top 53%)10414(Top 65%)10414(Top 522%)
25K15.53 mi2.42 mi15471-58310553-24010553-24017862(Top 63%)11460(Top 71%)11460(Top 574%)
30K18.64 mi3.11 mi16056-58510754-20110754-20118185(Top 64%)11453(Top 71%)11453(Top 574%)
20M20.00 mi1.36 mi15908+14810649+10510649+10514548(Top 51%)9711(Top 60%)9711(Top 487%)
21M21.00 mi1.00 mi15652+25610501+14810501+14812392(Top 44%)8565(Top 53%)8565(Top 429%)
35K21.75 mi0.75 mi15633+1910478+2310478+2315904(Top 56%)10131(Top 63%)10131(Top 508%)
23M23.00 mi1.25 mi15527+10610398+8010398+8014488(Top 51%)9394(Top 58%)9394(Top 471%)
24M24.00 mi1.00 mi15448+7910342+5610342+5613858(Top 49%)9083(Top 56%)9083(Top 455%)
40K24.85 mi0.85 mi15370+7810276+6610276+6614136(Top 50%)9063(Top 56%)9063(Top 454%)
25.2M25.20 mi0.35 mi15319+5110239+3710239+3712537(Top 44%)8265(Top 51%)8265(Top 414%)
Finish26.22 mi1.02 mi15243+7610187+5210187+5213433(Top 47%)8741(Top 54%)8741(Top 438%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

15153

Males

10441

M50-54

10441

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13540

Males

9817

M50-54

9817

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

15153

Males

10441

M50-54

10441

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16823

Males

11096

M50-54

11096

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

15168

Males

10414

M50-54

10414

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17862

Males

11460

M50-54

11460

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

18185

Males

11453

M50-54

11453

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

14548

Males

9711

M50-54

9711

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

12392

Males

8565

M50-54

8565

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

15904

Males

10131

M50-54

10131

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14488

Males

9394

M50-54

9394

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13858

Males

9083

M50-54

9083

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14136

Males

9063

M50-54

9063

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

12537

Males

8265

M50-54

8265

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13433

Males

8741

M50-54

8741

Passing Analysis

Category:
Athletes Passed
1685
Passed By
3329
Net Change
-1644
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13599
5K → 10K286277+9#13599#13590
10K → 15K77570-493#13590#14083
15K → 20K62847-785#14083#14868
20K → Half2747-20#14868#14888
Half → 25K63646-583#14888#15471
25K → 30K98683-585#15471#16056
30K → 20M19042+148#16056#15908
20M → 21M27519+256#15908#15652
21M → 35K6445+19#15652#15633
35K → 23M15751+106#15633#15527
23M → 24M11031+79#15527#15448
24M → 40K11638+78#15448#15370
40K → 25.2M587+51#15370#15319
25.2M → Finish10226+76#15319#15243
TOTALS16853329-1644
📊

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