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BOSTON MARATHON 2025

Nicholas Fong

Bib: 3538•M

NH

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 14%
Gender (Male)
#0 / 16105
Top 23%
Division (M18-39)
#0 / 5642
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:35
Rank: #1027
Start → 5K
18:35 | 5:59/mi
10K· 6.21 mi
36:52
Rank: #900 (+127)
5K → 10K
18:17 | 5:53/mi
15K· 9.32 mi
55:20
Rank: #888 (+12)
10K → 15K
18:28 | 5:57/mi
20K· 12.43 mi
1:14:03
Rank: #889 (-1)
15K → 20K
18:43 | 6:01/mi
Half· 13.11 mi
1:18:03
Rank: #877 (+12)
20K → Half
4:00 | 5:52/mi
25K· 15.53 mi
1:32:45
Rank: #873 (+4)
Half → 25K
14:42 | 6:04/mi
30K· 18.64 mi
1:51:53
Rank: #834 (+39)
25K → 30K
19:08 | 6:10/mi
20M
2:00:35
Rank: #836 (-2)
30K → 20M
8:42 | 6:24/mi
21M
2:07:36
Rank: #869 (-33)
20M → 21M
7:01 | 7:01/mi
35K· 21.75 mi
2:12:36
Rank: #911 (-42)
21M → 35K
5:00 | 6:41/mi
23M
2:23:52
Rank: #1367 (-456)
35K → 23M
11:16 | 9:00/mi
24M
2:34:17
Rank: #2108 (-741)
23M → 24M
10:25 | 10:25/mi
40K· 24.85 mi
2:43:12
Rank: #2732 (-624)
24M → 40K
8:55 | 10:26/mi
25.2M
2:48:06
Rank: #3234 (-502)
40K → 25.2M
4:54 | 14:13/mi
Finish· 26.22 mi
2:57:39
Rank: #3935 (-701)
25.2M → Finish
9:33 | 9:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:03
Pace5:57 /mi
2nd Half
Distance13.11 mi
Time1:39:36
Pace7:36 /mi
📊Positive Split: 27.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:0018:355:5918:35
5:59
-
10K
6.21 mi10:39:1736:525:5618:17
5:53
-0:06
15K
9.32 mi10:57:4555:205:5618:28
5:57
+0:04
20K
12.43 mi11:16:281:14:035:5818:43
6:01
+0:04
Half
13.11 mi11:20:281:18:035:574:00
5:52
-0:09
25K
15.53 mi11:35:101:32:455:5814:42
6:04
+0:12
30K
18.64 mi11:54:181:51:536:0019:08
6:10
+0:06
20M
20.00 mi12:03:002:00:356:028:42
6:24
+0:14
21M
21.00 mi12:10:012:07:366:057:01
7:01
+0:37
35K
21.75 mi12:15:012:12:366:065:00
6:41
-0:20
23M
23.00 mi12:26:172:23:526:1511:16
9:00
+2:19
24M
24.00 mi12:36:422:34:176:2610:25
10:25
+1:25
40K
24.85 mi12:45:372:43:126:348:55
10:26
+0:01
25.2M
25.20 mi12:50:312:48:066:404:54
14:13
+3:47
Finish
26.22 mi13:00:042:57:396:479:33
9:22
-4:51

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

5:52 /mi

Average Pace

6:47 /mi

Slowest Pace

14:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:12:36

75% of race

Time at Slower Pace

45:03

25% of race

Average Pace: 6:47 /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 mi10:21:0018:355:5918:35
5:59
#1027
10K
6.21 mi10:39:1736:525:5618:17
5:53
#900
15K
9.32 mi10:57:4555:205:5618:28
5:57
#888
20K
12.43 mi11:16:281:14:035:5818:43
6:01
#889
Half
13.11 mi11:20:281:18:035:574:00
5:52
#877
25K
15.53 mi11:35:101:32:455:5814:42
6:04
#873
30K
18.64 mi11:54:181:51:536:0019:08
6:10
#834
20M
20.00 mi12:03:002:00:356:028:42
6:24
#836
21M
21.00 mi12:10:012:07:366:057:01
7:01
#869
35K
21.75 mi12:15:012:12:366:065:00
6:41
#911
23M
23.00 mi12:26:172:23:526:1511:16
9:00
#1367
24M
24.00 mi12:36:422:34:176:2610:25
10:25
#2108
40K
24.85 mi12:45:372:43:126:348:55
10:26
#2732
25.2M
25.20 mi12:50:312:48:066:404:54
14:13
#3234
Finish
26.22 mi13:00:042:57:396:479:33
9:22
#3935
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1027968968874(Top 3%)822(Top 5%)822(Top 15%)
10K6.21 mi3.10 mi900+127846+122846+122792(Top 3%)742(Top 5%)742(Top 13%)
15K9.32 mi3.11 mi888+12834+12834+12874(Top 3%)822(Top 5%)822(Top 15%)
20K12.43 mi3.11 mi889-1836-2836-2944(Top 3%)890(Top 6%)890(Top 16%)
Half13.11 mi0.68 mi877+12825+11825+11762(Top 3%)716(Top 4%)716(Top 13%)
25K15.53 mi2.42 mi873+4821+4821+4983(Top 3%)927(Top 6%)927(Top 16%)
30K18.64 mi3.11 mi834+39783+38783+38815(Top 3%)764(Top 5%)764(Top 14%)
20M20.00 mi1.36 mi836-2785-2785-21262(Top 4%)1193(Top 7%)1193(Top 21%)
21M21.00 mi1.00 mi869-33816-31816-312328(Top 8%)2174(Top 13%)2174(Top 39%)
35K21.75 mi0.75 mi911-42856-40856-403394(Top 12%)3093(Top 19%)3093(Top 55%)
23M23.00 mi1.25 mi1367-4561290-4341290-43416210(Top 57%)10157(Top 63%)10157(Top 180%)
24M24.00 mi1.00 mi2108-7412004-7142004-71422553(Top 79%)13079(Top 81%)13079(Top 232%)
40K24.85 mi0.85 mi2732-6242590-5862590-58621700(Top 76%)12598(Top 78%)12598(Top 223%)
25.2M25.20 mi0.35 mi3234-5023044-4543044-45426480(Top 93%)14980(Top 93%)14980(Top 266%)
Finish26.22 mi1.02 mi3935-7013639-5953639-59520646(Top 73%)12118(Top 75%)12118(Top 215%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

874

Males

822

M18-39

822

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

792

Males

742

M18-39

742

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

874

Males

822

M18-39

822

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

944

Males

890

M18-39

890

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

762

Males

716

M18-39

716

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

983

Males

927

M18-39

927

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

815

Males

764

M18-39

764

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1262

Males

1193

M18-39

1193

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2328

Males

2174

M18-39

2174

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3394

Males

3093

M18-39

3093

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

16210

Males

10157

M18-39

10157

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

22553

Males

13079

M18-39

13079

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21700

Males

12598

M18-39

12598

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26480

Males

14980

M18-39

14980

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

20646

Males

12118

M18-39

12118

Passing Analysis

Category:
Athletes Passed
338
Passed By
3246
Net Change
-2908
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1027
5K → 10K1358+127#1027#900
10K → 15K3321+12#900#888
15K → 20K3334-1#888#889
20K → Half153+12#889#877
Half → 25K2420+4#877#873
25K → 30K5920+39#873#834
30K → 20M1820-2#834#836
20M → 21M1043-33#836#869
21M → 35K850-42#869#911
35K → 23M2458-456#911#1367
23M → 24M0741-741#1367#2108
24M → 40K1625-624#2108#2732
40K → 25.2M0502-502#2732#3234
25.2M → Finish0701-701#3234#3935
TOTALS3383246-2908
📊

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