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BOSTON MARATHON 2025

Muxuan Sun

Bib: 4258•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 30%
Gender (Male)
#0 / 16105
Top 43%
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
20:13
Rank: #3901
Start → 5K
20:13 | 6:30/mi
10K· 6.21 mi
40:48
Rank: #4248 (-347)
5K → 10K
20:35 | 6:38/mi
15K· 9.32 mi
1:01:28
Rank: #4361 (-113)
10K → 15K
20:40 | 6:39/mi
20K· 12.43 mi
1:23:42
Rank: #5326 (-965)
15K → 20K
22:14 | 7:09/mi
Half· 13.11 mi
1:28:33
Rank: #5533 (-207)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:46:14
Rank: #6063 (-530)
Half → 25K
17:41 | 7:18/mi
30K· 18.64 mi
2:10:21
Rank: #6611 (-548)
25K → 30K
24:07 | 7:46/mi
20M
2:21:17
Rank: #6794 (-183)
30K → 20M
10:56 | 8:03/mi
21M
2:30:31
Rank: #7185 (-391)
20M → 21M
9:14 | 9:14/mi
35K· 21.75 mi
2:36:41
Rank: #7349 (-164)
21M → 35K
6:10 | 8:15/mi
23M
2:47:59
Rank: #7838 (-489)
35K → 23M
11:18 | 9:02/mi
24M
2:55:37
Rank: #7854 (-16)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
3:02:34
Rank: #7943 (-89)
24M → 40K
6:57 | 8:08/mi
25.2M
3:05:37
Rank: #7977 (-34)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:14:32
Rank: #8390 (-413)
25.2M → Finish
8:55 | 8:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:33
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:45:59
Pace8:05 /mi
📊Positive Split: 19.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:3620:136:3020:13
6:30
-
10K
6.21 mi10:43:1140:486:3420:35
6:38
+0:08
15K
9.32 mi11:03:511:01:286:3620:40
6:39
+0:01
20K
12.43 mi11:26:051:23:426:4422:14
7:09
+0:30
Half
13.11 mi11:30:561:28:336:454:51
7:07
-0:02
25K
15.53 mi11:48:371:46:146:5017:41
7:18
+0:11
30K
18.64 mi12:12:442:10:217:0024:07
7:46
+0:28
20M
20.00 mi12:23:402:21:177:0410:56
8:03
+0:17
21M
21.00 mi12:32:542:30:317:109:14
9:14
+1:11
35K
21.75 mi12:39:042:36:417:126:10
8:15
-0:59
23M
23.00 mi12:50:222:47:597:1811:18
9:02
+0:47
24M
24.00 mi12:58:002:55:377:197:38
7:38
-1:24
40K
24.85 mi13:04:573:02:347:216:57
8:08
+0:30
25.2M
25.20 mi13:08:003:05:377:223:03
8:51
+0:43
Finish
26.22 mi13:16:553:14:327:258:55
8:45
-0:06

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

6:30 /mi

Average Pace

7:25 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:14

55% of race

Time at Steady Pace

49:38

26% of race

Time at Slower Pace

38:40

20% of race

Average Pace: 7:25 /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 mi10:22:3620:136:3020:13
6:30
#3901
10K
6.21 mi10:43:1140:486:3420:35
6:38
#4248
15K
9.32 mi11:03:511:01:286:3620:40
6:39
#4361
20K
12.43 mi11:26:051:23:426:4422:14
7:09
#5326
Half
13.11 mi11:30:561:28:336:454:51
7:07
#5533
25K
15.53 mi11:48:371:46:146:5017:41
7:18
#6063
30K
18.64 mi12:12:442:10:217:0024:07
7:46
#6611
20M
20.00 mi12:23:402:21:177:0410:56
8:03
#6794
21M
21.00 mi12:32:542:30:317:109:14
9:14
#7185
35K
21.75 mi12:39:042:36:417:126:10
8:15
#7349
23M
23.00 mi12:50:222:47:597:1811:18
9:02
#7838
24M
24.00 mi12:58:002:55:377:197:38
7:38
#7854
40K
24.85 mi13:04:573:02:347:216:57
8:08
#7943
25.2M
25.20 mi13:08:003:05:377:223:03
8:51
#7977
Finish
26.22 mi13:16:553:14:327:258:55
8:45
#8390
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3901369336934680(Top 16%)4381(Top 27%)4381(Top 78%)
10K6.21 mi3.10 mi4248-3473996-3033996-3034670(Top 16%)4372(Top 27%)4372(Top 77%)
15K9.32 mi3.11 mi4361-1134100-1044100-1044680(Top 16%)4381(Top 27%)4381(Top 78%)
20K12.43 mi3.11 mi5326-9654929-8294929-8297860(Top 28%)6783(Top 42%)6783(Top 120%)
Half13.11 mi0.68 mi5533-2075092-1635092-1638328(Top 29%)7097(Top 44%)7097(Top 126%)
25K15.53 mi2.42 mi6063-5305510-4185510-4188312(Top 29%)6947(Top 43%)6947(Top 123%)
30K18.64 mi3.11 mi6611-5485917-4075917-4079619(Top 34%)7486(Top 46%)7486(Top 133%)
20M20.00 mi1.36 mi6794-1836029-1126029-11210708(Top 38%)7885(Top 49%)7885(Top 140%)
21M21.00 mi1.00 mi7185-3916277-2486277-24814762(Top 52%)9677(Top 60%)9677(Top 172%)
35K21.75 mi0.75 mi7349-1646365-886365-8813838(Top 49%)9189(Top 57%)9189(Top 163%)
23M23.00 mi1.25 mi7838-4896637-2726637-27216382(Top 58%)10224(Top 63%)10224(Top 181%)
24M24.00 mi1.00 mi7854-166609+286609+288631(Top 30%)6451(Top 40%)6451(Top 114%)
40K24.85 mi0.85 mi7943-896637-286637-2811044(Top 39%)7580(Top 47%)7580(Top 134%)
25.2M25.20 mi0.35 mi7977-346642-56642-510825(Top 38%)7378(Top 46%)7378(Top 131%)
Finish26.22 mi1.02 mi8390-4136866-2246866-22417737(Top 62%)10732(Top 67%)10732(Top 190%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4680

Males

4381

M18-39

4381

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4670

Males

4372

M18-39

4372

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4680

Males

4381

M18-39

4381

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7860

Males

6783

M18-39

6783

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

8328

Males

7097

M18-39

7097

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8312

Males

6947

M18-39

6947

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9619

Males

7486

M18-39

7486

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10708

Males

7885

M18-39

7885

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

14762

Males

9677

M18-39

9677

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13838

Males

9189

M18-39

9189

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16382

Males

10224

M18-39

10224

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

8631

Males

6451

M18-39

6451

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11044

Males

7580

M18-39

7580

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10825

Males

7378

M18-39

7378

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

17737

Males

10732

M18-39

10732

Passing Analysis

Category:
Athletes Passed
479
Passed By
4968
Net Change
-4489
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3901
5K → 10K40387-347#3901#4248
10K → 15K60173-113#4248#4361
15K → 20K17982-965#4361#5326
20K → Half2209-207#5326#5533
Half → 25K41571-530#5533#6063
25K → 30K66614-548#6063#6611
30K → 20M41224-183#6611#6794
20M → 21M28419-391#6794#7185
21M → 35K14178-164#7185#7349
35K → 23M24513-489#7349#7838
23M → 24M7086-16#7838#7854
24M → 40K45134-89#7854#7943
40K → 25.2M2357-34#7943#7977
25.2M → Finish8421-413#7977#8390
TOTALS4794968-4489
📊

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