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BOSTON MARATHON 2025

Alex Mu

Bib: 5766•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 43%
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
6:34/mi
20:25
↑ 97↓ 3451.5%
10K· 6.21 mi
6:31/mi
40:39
↑ 79↓ 1380.4%
15K· 9.32 mi
6:29/mi
1:00:48
↑ 67↓ 78
20K· 12.43 mi
6:29/mi
1:20:57
↑ 106↓ 860.1%
Half· 13.11 mi
6:31/mi
1:25:24
↑ 19↓ 370.5%
25K· 15.53 mi
6:29/mi
1:41:07
↑ 66↓ 880.2%
30K· 18.64 mi
6:43/mi
2:01:58
↑ 181↓ 1480.2%
20M
6:47/mi
2:11:11
↑ 64↓ 500.2%
21M
7:15/mi
2:18:26
↑ 106↓ 241.6%
35K· 21.75 mi
6:36/mi
2:23:22
↑ 17↓ 861.7%
23M
6:55/mi
2:32:02
↑ 23↓ 630.6%
24M
6:57/mi
2:38:59
↓ 821.3%
40K· 24.85 mi
7:30/mi
2:45:24
↓ 200.3%
25.2M
8:16/mi
2:48:15
↑ 13↓ 160.2%
Finish· 26.22 mi
7:22/mi
2:55:45
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:24
Pace6:31 /mi
2nd Half
Distance13.11 mi
Time1:30:21
Pace6:54 /mi
📊Positive Split: 5.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:1220:256:3420:25
6:34
-
10K
6.21 mi10:47:2640:396:3320:14
6:31
-0:03
15K
9.32 mi11:07:351:00:486:3120:09
6:29
-0:02
20K
12.43 mi11:27:441:20:576:3120:09
6:29
0:00
Half
13.11 mi11:32:111:25:246:314:27
6:31
+0:02
25K
15.53 mi11:47:541:41:076:3115:43
6:29
-0:02
30K
18.64 mi12:08:452:01:586:3320:51
6:43
+0:14
20M
20.00 mi12:17:582:11:116:349:13
6:47
+0:04
21M
21.00 mi12:25:132:18:266:367:15
7:15
+0:28
35K
21.75 mi12:30:092:23:226:364:56
6:36
-0:39
23M
23.00 mi12:38:492:32:026:378:40
6:55
+0:19
24M
24.00 mi12:45:462:38:596:376:57
6:57
+0:02
40K
24.85 mi12:52:112:45:246:396:25
7:30
+0:33
25.2M
25.20 mi12:55:022:48:156:412:51
8:16
+0:46
Finish
26.22 mi13:02:322:55:456:427:30
7:22
-0:54

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

6:29 /mi

Average Pace

6:42 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:31:44

86% of race

Time at Slower Pace

24:01

14% of race

Average Pace: 6:42 /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 mi10:27:1220:256:3420:25
6:34
#4368
10K
6.21 mi10:47:2640:396:3320:14
6:31
#4086
15K
9.32 mi11:07:351:00:486:3120:09
6:29
#3851
20K
12.43 mi11:27:441:20:576:3120:09
6:29
#3622
Half
13.11 mi11:32:111:25:246:314:27
6:31
#3625
25K
15.53 mi11:47:541:41:076:3115:43
6:29
#3442
30K
18.64 mi12:08:452:01:586:3320:51
6:43
#3283
20M
20.00 mi12:17:582:11:116:349:13
6:47
#3204
21M
21.00 mi12:25:132:18:266:367:15
7:15
#3185
35K
21.75 mi12:30:092:23:226:364:56
6:36
#3158
23M
23.00 mi12:38:492:32:026:378:40
6:55
#3112
24M
24.00 mi12:45:462:38:596:376:57
6:57
#3131
40K
24.85 mi12:52:112:45:246:396:25
7:30
#3226
25.2M
25.20 mi12:55:022:48:156:412:51
8:16
#3276
Finish
26.22 mi13:02:322:55:456:427:30
7:22
#3425
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4368410541053478(Top 12%)3294(Top 20%)3294(Top 58%)
10K6.21 mi3.10 mi4086+2823853+2523853+2523833(Top 13%)3614(Top 22%)3614(Top 64%)
15K9.32 mi3.11 mi3851+2353636+2173636+2173478(Top 12%)3294(Top 20%)3294(Top 58%)
20K12.43 mi3.11 mi3622+2293428+2083428+2083054(Top 11%)2906(Top 18%)2906(Top 52%)
Half13.11 mi0.68 mi3625-33431-33431-33863(Top 14%)3643(Top 23%)3643(Top 65%)
25K15.53 mi2.42 mi3442+1833266+1653266+1652806(Top 10%)2670(Top 17%)2670(Top 47%)
30K18.64 mi3.11 mi3283+1593110+1563110+1562948(Top 10%)2776(Top 17%)2776(Top 49%)
20M20.00 mi1.36 mi3204+793036+743036+742852(Top 10%)2668(Top 17%)2668(Top 47%)
21M21.00 mi1.00 mi3185+193016+203016+203392(Top 12%)3114(Top 19%)3114(Top 55%)
35K21.75 mi0.75 mi3158+272989+272989+272954(Top 10%)2726(Top 17%)2726(Top 48%)
23M23.00 mi1.25 mi3112+462942+472942+473347(Top 12%)3045(Top 19%)3045(Top 54%)
24M24.00 mi1.00 mi3131-192956-142956-144358(Top 15%)3810(Top 24%)3810(Top 68%)
40K24.85 mi0.85 mi3226-953040-843040-846812(Top 24%)5317(Top 33%)5317(Top 94%)
25.2M25.20 mi0.35 mi3276-503084-443084-447376(Top 26%)5541(Top 34%)5541(Top 98%)
Finish26.22 mi1.02 mi3425-1493204-1203204-1208161(Top 29%)5994(Top 37%)5994(Top 106%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21story building
+97ft-345ft

Overall

3478

Males

3294

M18-39

3294

5K→10K

3.1 - 6.2 mi

Top 13%
×5story building
+79ft-138ft

Overall

3833

Males

3614

M18-39

3614

10K→15K

6.2 - 9.3 mi

Top 12%
×3story building
+67ft-78ft

Overall

3478

Males

3294

M18-39

3294

15K→20K

9.3 - 12.4 mi

Top 11%
×5story building
+106ft-86ft

Overall

3054

Males

2906

M18-39

2906

20K→Half

12.4 - 13.1 mi

Top 14%
×2story building
+19ft-37ft

Overall

3863

Males

3643

M18-39

3643

Half→25K

13.1 - 15.5 mi

Top 10%
×4story building
+66ft-88ft

Overall

2806

Males

2670

M18-39

2670

25K→30K

15.5 - 18.6 mi

Top 10%
×9story building
+181ft-148ft

Overall

2948

Males

2776

M18-39

2776

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2852

Males

2668

M18-39

2668

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3392

Males

3114

M18-39

3114

21M→35K

21.0 - 21.8 mi

Top 10%
×7story building
+17ft-86ft

Overall

2954

Males

2726

M18-39

2726

35K→23M

21.8 - 23.0 mi

Top 12%
×5story building
+23ft-63ft

Overall

3347

Males

3045

M18-39

3045

23M→24M

23.0 - 24.0 mi

Top 15%
×6story building
+12ft-82ft

Overall

4358

Males

3810

M18-39

3810

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6812

Males

5317

M18-39

5317

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7376

Males

5541

M18-39

5541

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

8161

Males

5994

M18-39

5994

Passing Analysis

Category:
Athletes Passed
1591
Passed By
648
Net Change
+943
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4368
5K → 10K33149+282#4368#4086
10K → 15K25116+235#4086#3851
15K → 20K2378+229#3851#3622
20K → Half1821-3#3622#3625
Half → 25K1896+183#3625#3442
25K → 30K19334+159#3442#3283
30K → 20M9617+79#3283#3204
20M → 21M6445+19#3204#3185
21M → 35K4417+27#3185#3158
35K → 23M8337+46#3158#3112
23M → 24M3958-19#3112#3131
24M → 40K21116-95#3131#3226
40K → 25.2M757-50#3226#3276
25.2M → Finish18167-149#3276#3425
TOTALS1591648+943
📊

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