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BOSTON MARATHON 2025

Dennis Mui

Bib: 13812•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 46%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 49%
Division (M45-49)
#0 / 2386
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
7:38/mi
23:44
↑ 97↓ 3451.5%
10K· 6.21 mi
8:24/mi
49:50
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:14:08
↑ 67↓ 78
20K· 12.43 mi
7:58/mi
1:38:52
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:44:14
↑ 19↓ 370.5%
25K· 15.53 mi
7:49/mi
2:03:12
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:28:56
↑ 181↓ 1480.2%
20M
8:07/mi
2:39:58
↑ 64↓ 500.2%
21M
8:37/mi
2:48:35
↑ 106↓ 241.6%
35K· 21.75 mi
7:40/mi
2:54:19
↑ 17↓ 861.7%
23M
8:12/mi
3:04:35
↑ 23↓ 630.6%
24M
7:44/mi
3:12:19
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:19:18
↓ 200.3%
25.2M
8:56/mi
3:22:23
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:29:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:14
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:45:44
Pace8:04 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:0223:447:3823:44
7:38
-
10K
6.21 mi11:20:0849:508:0126:06
8:24
+0:46
15K
9.32 mi11:44:261:14:087:5724:18
7:49
-0:35
20K
12.43 mi12:09:101:38:527:5724:44
7:58
+0:09
Half
13.11 mi12:14:321:44:147:575:22
7:52
-0:06
25K
15.53 mi12:33:302:03:127:5618:58
7:49
-0:03
30K
18.64 mi12:59:142:28:567:5925:44
8:17
+0:28
20M
20.00 mi13:10:162:39:588:0011:02
8:07
-0:10
21M
21.00 mi13:18:532:48:358:028:37
8:37
+0:30
35K
21.75 mi13:24:372:54:198:015:44
7:40
-0:57
23M
23.00 mi13:34:533:04:358:0210:16
8:12
+0:32
24M
24.00 mi13:42:373:12:198:017:44
7:44
-0:28
40K
24.85 mi13:49:363:19:188:016:59
8:10
+0:26
25.2M
25.20 mi13:52:413:22:238:023:05
8:56
+0:46
Finish
26.22 mi14:00:163:29:588:017:35
7:26
-1:30

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

7:26 /mi

Average Pace

8:01 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

44:47

21% of race

Time at Steady Pace

1:24:24

40% of race

Time at Slower Pace

1:20:47

38% of race

Average Pace: 8:00 /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 mi10:54:0223:447:3823:44
7:38
#13418
10K
6.21 mi11:20:0849:508:0126:06
8:24
#16668
15K
9.32 mi11:44:261:14:087:5724:18
7:49
#15942
20K
12.43 mi12:09:101:38:527:5724:44
7:58
#15593
Half
13.11 mi12:14:321:44:147:575:22
7:52
#15548
25K
15.53 mi12:33:302:03:127:5618:58
7:49
#14998
30K
18.64 mi12:59:142:28:567:5925:44
8:17
#14620
20M
20.00 mi13:10:162:39:588:0011:02
8:07
#14305
21M
21.00 mi13:18:532:48:358:028:37
8:37
#14070
35K
21.75 mi13:24:372:54:198:015:44
7:40
#13886
23M
23.00 mi13:34:533:04:358:0210:16
8:12
#13711
24M
24.00 mi13:42:373:12:198:017:44
7:44
#13495
40K
24.85 mi13:49:363:19:188:016:59
8:10
#13390
25.2M
25.20 mi13:52:413:22:238:023:05
8:56
#13351
Finish
26.22 mi14:00:163:29:588:017:35
7:26
#13205
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi134189822982214542(Top 51%)10159(Top 63%)10159(Top 426%)
10K6.21 mi3.10 mi16668-325011085-126311085-126319184(Top 68%)12132(Top 75%)12132(Top 508%)
15K9.32 mi3.11 mi15942+72610786+29910786+29914542(Top 51%)10159(Top 63%)10159(Top 426%)
20K12.43 mi3.11 mi15593+34910624+16210624+16214610(Top 51%)10134(Top 63%)10134(Top 425%)
Half13.11 mi0.68 mi15548+4510608+1610608+1614739(Top 52%)10214(Top 63%)10214(Top 428%)
25K15.53 mi2.42 mi14998+55010340+26810340+26812530(Top 44%)9086(Top 56%)9086(Top 381%)
30K18.64 mi3.11 mi14620+37810122+21810122+21813366(Top 47%)9293(Top 58%)9293(Top 389%)
20M20.00 mi1.36 mi14305+3159959+1639959+16311242(Top 40%)8161(Top 51%)8161(Top 342%)
21M21.00 mi1.00 mi14070+2359826+1339826+13311190(Top 39%)7975(Top 50%)7975(Top 334%)
35K21.75 mi0.75 mi13886+1849721+1059721+1059799(Top 34%)7277(Top 45%)7277(Top 305%)
23M23.00 mi1.25 mi13711+1759607+1149607+11411358(Top 40%)7925(Top 49%)7925(Top 332%)
24M24.00 mi1.00 mi13495+2169485+1229485+1229339(Top 33%)6833(Top 42%)6833(Top 286%)
40K24.85 mi0.85 mi13390+1059414+719414+7111355(Top 40%)7746(Top 48%)7746(Top 325%)
25.2M25.20 mi0.35 mi13351+399385+299385+2911443(Top 40%)7703(Top 48%)7703(Top 323%)
Finish26.22 mi1.02 mi13205+1469297+889297+888777(Top 31%)6331(Top 39%)6331(Top 265%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14542

Males

10159

M45-49

10159

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19184

Males

12132

M45-49

12132

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14542

Males

10159

M45-49

10159

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

14610

Males

10134

M45-49

10134

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14739

Males

10214

M45-49

10214

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12530

Males

9086

M45-49

9086

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13366

Males

9293

M45-49

9293

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11242

Males

8161

M45-49

8161

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

11190

Males

7975

M45-49

7975

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

9799

Males

7277

M45-49

7277

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

11358

Males

7925

M45-49

7925

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

9339

Males

6833

M45-49

6833

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11355

Males

7746

M45-49

7746

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11443

Males

7703

M45-49

7703

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8777

Males

6331

M45-49

6331

Passing Analysis

Category:
Athletes Passed
3754
Passed By
3541
Net Change
+213
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13418
5K → 10K93259-3250#13418#16668
10K → 15K73913+726#16668#15942
15K → 20K40354+349#15942#15593
20K → Half6217+45#15593#15548
Half → 25K5577+550#15548#14998
25K → 30K45476+378#14998#14620
30K → 20M3249+315#14620#14305
20M → 21M25419+235#14305#14070
21M → 35K1862+184#14070#13886
35K → 23M20126+175#13886#13711
23M → 24M2259+216#13711#13495
24M → 40K12621+105#13495#13390
40K → 25.2M5718+39#13390#13351
25.2M → Finish15711+146#13351#13205
TOTALS37543541+213
📊

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