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BOSTON MARATHON 2025

Viet Nguyen

Bib: 4171•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
Masters (Masters Men)
#0 / 10463
Top 12%
Division (M40-44)
#0 / 2247
Top 32%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:19
Rank: #1956
Start → 5K
19:19 | 6:13/mi
10K· 6.21 mi
38:32
Rank: #1881 (+75)
5K → 10K
19:13 | 6:11/mi
15K· 9.32 mi
57:57
Rank: #1929 (-48)
10K → 15K
19:25 | 6:15/mi
20K· 12.43 mi
1:18:58
Rank: #2582 (-653)
15K → 20K
21:01 | 6:46/mi
Half· 13.11 mi
1:23:33
Rank: #2693 (-111)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:40:49
Rank: #3306 (-613)
Half → 25K
17:16 | 7:07/mi
30K· 18.64 mi
2:04:35
Rank: #4177 (-871)
25K → 30K
23:46 | 7:39/mi
20M
2:15:18
Rank: #4644 (-467)
30K → 20M
10:43 | 7:53/mi
21M
2:22:57
Rank: #4659 (-15)
20M → 21M
7:39 | 7:39/mi
35K· 21.75 mi
2:28:13
Rank: #4674 (-15)
21M → 35K
5:16 | 7:02/mi
23M
2:36:59
Rank: #4585 (+89)
35K → 23M
8:46 | 7:00/mi
24M
2:43:52
Rank: #4530 (+55)
23M → 24M
6:53 | 6:53/mi
40K· 24.85 mi
2:49:49
Rank: #4478 (+52)
24M → 40K
5:57 | 6:58/mi
25.2M
2:52:32
Rank: #4492 (-14)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
2:59:49
Rank: #4631 (-139)
25.2M → Finish
7:17 | 7:09/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:33
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:36:16
Pace7:21 /mi
📊Positive Split: 15.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0219:196:1319:19
6:13
-
10K
6.21 mi10:41:1538:326:1219:13
6:11
-0:02
15K
9.32 mi11:00:4057:576:1319:25
6:15
+0:04
20K
12.43 mi11:21:411:18:586:2121:01
6:46
+0:31
Half
13.11 mi11:26:161:23:336:224:35
6:43
-0:03
25K
15.53 mi11:43:321:40:496:2917:16
7:07
+0:24
30K
18.64 mi12:07:182:04:356:4123:46
7:39
+0:32
20M
20.00 mi12:18:012:15:186:4610:43
7:53
+0:14
21M
21.00 mi12:25:402:22:576:487:39
7:39
-0:14
35K
21.75 mi12:30:562:28:136:495:16
7:02
-0:37
23M
23.00 mi12:39:422:36:596:508:46
7:00
-0:02
24M
24.00 mi12:46:352:43:526:506:53
6:53
-0:07
40K
24.85 mi12:52:322:49:496:505:57
6:58
+0:05
25.2M
25.20 mi12:55:152:52:326:512:43
7:53
+0:55
Finish
26.22 mi13:02:322:59:496:527:17
7:09
-0:44

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

6:11 /mi

Average Pace

6:52 /mi

Slowest Pace

7:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:32

35% of race

Time at Steady Pace

1:12:26

40% of race

Time at Slower Pace

44:51

25% of race

Average Pace: 6:51 /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 mi10:22:0219:196:1319:19
6:13
#1956
10K
6.21 mi10:41:1538:326:1219:13
6:11
#1881
15K
9.32 mi11:00:4057:576:1319:25
6:15
#1929
20K
12.43 mi11:21:411:18:586:2121:01
6:46
#2582
Half
13.11 mi11:26:161:23:336:224:35
6:43
#2693
25K
15.53 mi11:43:321:40:496:2917:16
7:07
#3306
30K
18.64 mi12:07:182:04:356:4123:46
7:39
#4177
20M
20.00 mi12:18:012:15:186:4610:43
7:53
#4644
21M
21.00 mi12:25:402:22:576:487:39
7:39
#4659
35K
21.75 mi12:30:562:28:136:495:16
7:02
#4674
23M
23.00 mi12:39:422:36:596:508:46
7:00
#4585
24M
24.00 mi12:46:352:43:526:506:53
6:53
#4530
40K
24.85 mi12:52:322:49:496:505:57
6:58
#4478
25.2M
25.20 mi12:55:152:52:326:512:43
7:53
#4492
Finish
26.22 mi13:02:322:59:496:527:17
7:09
#4631
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1956185918592098(Top 7%)2001(Top 12%)2001(Top 89%)
10K6.21 mi3.10 mi1881+751790+691790+691842(Top 6%)1750(Top 11%)1750(Top 78%)
15K9.32 mi3.11 mi1929-481835-451835-452098(Top 7%)2001(Top 12%)2001(Top 89%)
20K12.43 mi3.11 mi2582-6532463-6282463-6284944(Top 17%)4568(Top 28%)4568(Top 203%)
Half13.11 mi0.68 mi2693-1112569-1062569-1065358(Top 19%)4913(Top 31%)4913(Top 219%)
25K15.53 mi2.42 mi3306-6133143-5743143-5747085(Top 25%)6175(Top 38%)6175(Top 275%)
30K18.64 mi3.11 mi4177-8713914-7713914-7718806(Top 31%)7032(Top 44%)7032(Top 313%)
20M20.00 mi1.36 mi4644-4674306-3924306-3929575(Top 34%)7288(Top 45%)7288(Top 324%)
21M21.00 mi1.00 mi4659-154316-104316-105352(Top 19%)4622(Top 29%)4622(Top 206%)
35K21.75 mi0.75 mi4674-154318-24318-25571(Top 20%)4759(Top 30%)4759(Top 212%)
23M23.00 mi1.25 mi4585+894228+904228+903758(Top 13%)3381(Top 21%)3381(Top 150%)
24M24.00 mi1.00 mi4530+554176+524176+523967(Top 14%)3506(Top 22%)3506(Top 156%)
40K24.85 mi0.85 mi4478+524122+544122+543654(Top 13%)3224(Top 20%)3224(Top 143%)
25.2M25.20 mi0.35 mi4492-144125-34125-35215(Top 18%)4236(Top 26%)4236(Top 189%)
Finish26.22 mi1.02 mi4631-1394246-1214246-1216649(Top 23%)5109(Top 32%)5109(Top 227%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

2098

Males

2001

M40-44

2001

5K→10K

3.1 - 6.2 mi

Top 6%
×5stories
+79ft-138ft

Overall

1842

Males

1750

M40-44

1750

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

2098

Males

2001

M40-44

2001

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4944

Males

4568

M40-44

4568

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5358

Males

4913

M40-44

4913

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

7085

Males

6175

M40-44

6175

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8806

Males

7032

M40-44

7032

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9575

Males

7288

M40-44

7288

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5352

Males

4622

M40-44

4622

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5571

Males

4759

M40-44

4759

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3758

Males

3381

M40-44

3381

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3967

Males

3506

M40-44

3506

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3654

Males

3224

M40-44

3224

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

5215

Males

4236

M40-44

4236

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2stories
+22ft-21ft

Overall

6649

Males

5109

M40-44

5109

Passing Analysis

Category:
Athletes Passed
654
Passed By
3329
Net Change
-2675
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1956
5K → 10K14772+75#1956#1881
10K → 15K3987-48#1881#1929
15K → 20K7660-653#1929#2582
20K → Half1112-111#2582#2693
Half → 25K9622-613#2693#3306
25K → 30K15886-871#3306#4177
30K → 20M13480-467#4177#4644
20M → 21M6883-15#4644#4659
21M → 35K4358-15#4659#4674
35K → 23M11829+89#4674#4585
23M → 24M9338+55#4585#4530
24M → 40K6816+52#4530#4478
40K → 25.2M1832-14#4478#4492
25.2M → Finish15154-139#4492#4631
TOTALS6543329-2675
📊

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