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BOSTON MARATHON 2025

Nelson Smith

Bib: 2574•M

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 5%
Gender (Male)
#0 / 16105
Top 8%
Division (M18-39)
#0 / 5642
Top 19%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:39
Rank: #2578
Start → 5K
19:39 | 6:19/mi
10K· 6.21 mi
39:10
Rank: #2426 (+152)
5K → 10K
19:31 | 6:17/mi
15K· 9.32 mi
58:25
Rank: #2183 (+243)
10K → 15K
19:15 | 6:12/mi
20K· 12.43 mi
1:17:48
Rank: #2049 (+134)
15K → 20K
19:23 | 6:14/mi
Half· 13.11 mi
1:22:01
Rank: #2038 (+11)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:37:12
Rank: #1966 (+72)
Half → 25K
15:11 | 6:16/mi
30K· 18.64 mi
1:56:54
Rank: #1809 (+157)
25K → 30K
19:42 | 6:20/mi
20M
2:05:39
Rank: #1751 (+58)
30K → 20M
8:45 | 6:26/mi
21M
2:12:13
Rank: #1654 (+97)
20M → 21M
6:34 | 6:34/mi
35K· 21.75 mi
2:16:49
Rank: #1616 (+38)
21M → 35K
4:36 | 6:09/mi
23M
2:24:48
Rank: #1533 (+83)
35K → 23M
7:59 | 6:23/mi
24M
2:30:58
Rank: #1466 (+67)
23M → 24M
6:10 | 6:10/mi
40K· 24.85 mi
2:36:23
Rank: #1422 (+44)
24M → 40K
5:25 | 6:20/mi
25.2M
2:38:45
Rank: #1413 (+9)
40K → 25.2M
2:22 | 6:52/mi
Finish· 26.22 mi
2:44:52
Rank: #1366 (+47)
25.2M → Finish
6:07 | 6:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:01
Pace6:15 /mi
2nd Half
Distance13.11 mi
Time1:22:51
Pace6:19 /mi
📊Positive Split: 1.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3519:396:1919:39
6:19
-
10K
6.21 mi10:41:0639:106:1819:31
6:17
-0:02
15K
9.32 mi11:00:2158:256:1619:15
6:12
-0:05
20K
12.43 mi11:19:441:17:486:1619:23
6:14
+0:02
Half
13.11 mi11:23:571:22:016:154:13
6:11
-0:03
25K
15.53 mi11:39:081:37:126:1515:11
6:16
+0:05
30K
18.64 mi11:58:501:56:546:1619:42
6:20
+0:04
20M
20.00 mi12:07:352:05:396:178:45
6:26
+0:06
21M
21.00 mi12:14:092:12:136:186:34
6:34
+0:08
35K
21.75 mi12:18:452:16:496:174:36
6:09
-0:25
23M
23.00 mi12:26:442:24:486:187:59
6:23
+0:14
24M
24.00 mi12:32:542:30:586:176:10
6:10
-0:13
40K
24.85 mi12:38:192:36:236:185:25
6:20
+0:10
25.2M
25.20 mi12:40:412:38:456:182:22
6:52
+0:32
Finish
26.22 mi12:46:482:44:526:186:07
6:00
-0:52

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

6:00 /mi

Average Pace

6:18 /mi

Slowest Pace

6:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:30

99% of race

Time at Steady Pace

2:22

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:17 /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 mi10:21:3519:396:1919:39
6:19
#2578
10K
6.21 mi10:41:0639:106:1819:31
6:17
#2426
15K
9.32 mi11:00:2158:256:1619:15
6:12
#2183
20K
12.43 mi11:19:441:17:486:1619:23
6:14
#2049
Half
13.11 mi11:23:571:22:016:154:13
6:11
#2038
25K
15.53 mi11:39:081:37:126:1515:11
6:16
#1966
30K
18.64 mi11:58:501:56:546:1619:42
6:20
#1809
20M
20.00 mi12:07:352:05:396:178:45
6:26
#1751
21M
21.00 mi12:14:092:12:136:186:34
6:34
#1654
35K
21.75 mi12:18:452:16:496:174:36
6:09
#1616
23M
23.00 mi12:26:442:24:486:187:59
6:23
#1533
24M
24.00 mi12:32:542:30:586:176:10
6:10
#1466
40K
24.85 mi12:38:192:36:236:185:25
6:20
#1422
25.2M
25.20 mi12:40:412:38:456:182:22
6:52
#1413
Finish
26.22 mi12:46:482:44:526:186:07
6:00
#1366
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2578245424541835(Top 6%)1746(Top 11%)1746(Top 31%)
10K6.21 mi3.10 mi2426+1522313+1412313+1412291(Top 8%)2192(Top 14%)2192(Top 39%)
15K9.32 mi3.11 mi2183+2432084+2292084+2291835(Top 6%)1746(Top 11%)1746(Top 31%)
20K12.43 mi3.11 mi2049+1341956+1281956+1281734(Top 6%)1648(Top 10%)1648(Top 29%)
Half13.11 mi0.68 mi2038+111946+101946+101837(Top 6%)1750(Top 11%)1750(Top 31%)
25K15.53 mi2.42 mi1966+721875+711875+711701(Top 6%)1616(Top 10%)1616(Top 29%)
30K18.64 mi3.11 mi1809+1571722+1531722+1531334(Top 5%)1261(Top 8%)1261(Top 22%)
20M20.00 mi1.36 mi1751+581664+581664+581373(Top 5%)1298(Top 8%)1298(Top 23%)
21M21.00 mi1.00 mi1654+971568+961568+96834(Top 3%)789(Top 5%)789(Top 14%)
35K21.75 mi0.75 mi1616+381532+361532+361083(Top 4%)1021(Top 6%)1021(Top 18%)
23M23.00 mi1.25 mi1533+831451+811451+811072(Top 4%)1014(Top 6%)1014(Top 18%)
24M24.00 mi1.00 mi1466+671386+651386+65933(Top 3%)878(Top 5%)878(Top 16%)
40K24.85 mi0.85 mi1422+441343+431343+431050(Top 4%)982(Top 6%)982(Top 17%)
25.2M25.20 mi0.35 mi1413+91333+101333+101125(Top 4%)1035(Top 6%)1035(Top 18%)
Finish26.22 mi1.02 mi1366+471287+461287+46919(Top 3%)864(Top 5%)864(Top 15%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1835

Males

1746

M18-39

1746

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

2291

Males

2192

M18-39

2192

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1835

Males

1746

M18-39

1746

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1734

Males

1648

M18-39

1648

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1837

Males

1750

M18-39

1750

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1701

Males

1616

M18-39

1616

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1334

Males

1261

M18-39

1261

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1373

Males

1298

M18-39

1298

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

834

Males

789

M18-39

789

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1083

Males

1021

M18-39

1021

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1072

Males

1014

M18-39

1014

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

933

Males

878

M18-39

878

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1050

Males

982

M18-39

982

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1125

Males

1035

M18-39

1035

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

919

Males

864

M18-39

864

Passing Analysis

Category:
Athletes Passed
1348
Passed By
136
Net Change
+1212
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2578
5K → 10K20048+152#2578#2426
10K → 15K2485+243#2426#2183
15K → 20K1417+134#2183#2049
20K → Half187+11#2049#2038
Half → 25K9220+72#2038#1966
25K → 30K17215+157#1966#1809
30K → 20M6911+58#1809#1751
20M → 21M1003+97#1751#1654
21M → 35K413+38#1654#1616
35K → 23M885+83#1616#1533
23M → 24M681+67#1533#1466
24M → 40K462+44#1466#1422
40K → 25.2M134+9#1422#1413
25.2M → Finish525+47#1413#1366
TOTALS1348136+1212
📊

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