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BOSTON MARATHON 2025

Noah Nelsen

Bib: 1325•M

IA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 13%
Division (M18-39)
#0 / 5642
Top 30%
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
6:13/mi
19:20
↑ 97↓ 3451.5%
10K· 6.21 mi
6:10/mi
38:30
↑ 79↓ 1380.4%
15K· 9.32 mi
6:08/mi
57:34
↑ 67↓ 78
20K· 12.43 mi
6:13/mi
1:16:54
↑ 106↓ 860.1%
Half· 13.11 mi
6:14/mi
1:21:09
↑ 19↓ 370.5%
25K· 15.53 mi
6:19/mi
1:36:28
↑ 66↓ 880.2%
30K· 18.64 mi
6:35/mi
1:56:55
↑ 181↓ 1480.2%
20M
6:46/mi
2:06:07
↑ 64↓ 500.2%
21M
6:58/mi
2:13:05
↑ 106↓ 241.6%
35K· 21.75 mi
6:33/mi
2:17:59
↑ 17↓ 861.7%
23M
7:00/mi
2:26:45
↑ 23↓ 630.6%
24M
7:11/mi
2:33:56
↓ 821.3%
40K· 24.85 mi
7:16/mi
2:40:09
↓ 200.3%
25.2M
7:41/mi
2:42:48
↑ 13↓ 160.2%
Finish· 26.22 mi
6:36/mi
2:49:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:09
Pace6:11 /mi
2nd Half
Distance13.11 mi
Time1:28:23
Pace6:45 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5019:206:1319:20
6:13
-
10K
6.21 mi10:39:0038:306:1219:10
6:10
-0:03
15K
9.32 mi10:58:0457:346:1119:04
6:08
-0:02
20K
12.43 mi11:17:241:16:546:1119:20
6:13
+0:05
Half
13.11 mi11:21:391:21:096:114:15
6:14
+0:01
25K
15.53 mi11:36:581:36:286:1315:19
6:19
+0:05
30K
18.64 mi11:57:251:56:556:1620:27
6:35
+0:16
20M
20.00 mi12:06:372:06:076:189:12
6:46
+0:11
21M
21.00 mi12:13:352:13:056:206:58
6:58
+0:12
35K
21.75 mi12:18:292:17:596:214:54
6:33
-0:25
23M
23.00 mi12:27:152:26:456:238:46
7:00
+0:27
24M
24.00 mi12:34:262:33:566:257:11
7:11
+0:11
40K
24.85 mi12:40:392:40:096:276:13
7:16
+0:05
25.2M
25.20 mi12:43:182:42:486:282:39
7:41
+0:25
Finish
26.22 mi12:50:022:49:326:286:44
6:36
-1:05

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

6:08 /mi

Average Pace

6:28 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:28

57% of race

Time at Steady Pace

41:17

24% of race

Time at Slower Pace

31:47

19% of race

Average Pace: 6:28 /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 mi10:19:5019:206:1319:20
6:13
#1983
10K
6.21 mi10:39:0038:306:1219:10
6:10
#1845
15K
9.32 mi10:58:0457:346:1119:04
6:08
#1748
20K
12.43 mi11:17:241:16:546:1119:20
6:13
#1711
Half
13.11 mi11:21:391:21:096:114:15
6:14
#1725
25K
15.53 mi11:36:581:36:286:1315:19
6:19
#1729
30K
18.64 mi11:57:251:56:556:1620:27
6:35
#1814
20M
20.00 mi12:06:372:06:076:189:12
6:46
#1861
21M
21.00 mi12:13:352:13:056:206:58
6:58
#1837
35K
21.75 mi12:18:292:17:596:214:54
6:33
#1854
23M
23.00 mi12:27:152:26:456:238:46
7:00
#1920
24M
24.00 mi12:34:262:33:566:257:11
7:11
#2026
40K
24.85 mi12:40:392:40:096:276:13
7:16
#2114
25.2M
25.20 mi12:43:182:42:486:282:39
7:41
#2139
Finish
26.22 mi12:50:022:49:326:286:44
6:36
#2176
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1983188618861552(Top 5%)1475(Top 9%)1475(Top 26%)
10K6.21 mi3.10 mi1845+1381755+1311755+1311767(Top 6%)1680(Top 10%)1680(Top 30%)
15K9.32 mi3.11 mi1748+971662+931662+931552(Top 5%)1475(Top 9%)1475(Top 26%)
20K12.43 mi3.11 mi1711+371626+361626+361667(Top 6%)1585(Top 10%)1585(Top 28%)
Half13.11 mi0.68 mi1725-141639-131639-132118(Top 7%)2022(Top 13%)2022(Top 36%)
25K15.53 mi2.42 mi1729-41642-31642-31942(Top 7%)1848(Top 11%)1848(Top 33%)
30K18.64 mi3.11 mi1814-851727-851727-852329(Top 8%)2207(Top 14%)2207(Top 39%)
20M20.00 mi1.36 mi1861-471770-431770-432750(Top 10%)2575(Top 16%)2575(Top 46%)
21M21.00 mi1.00 mi1837+241746+241746+242118(Top 7%)1983(Top 12%)1983(Top 35%)
35K21.75 mi0.75 mi1854-171762-161762-162680(Top 9%)2478(Top 15%)2478(Top 44%)
23M23.00 mi1.25 mi1920-661822-601822-603737(Top 13%)3360(Top 21%)3360(Top 60%)
24M24.00 mi1.00 mi2026-1061923-1011923-1015665(Top 20%)4690(Top 29%)4690(Top 83%)
40K24.85 mi0.85 mi2114-882008-852008-855437(Top 19%)4497(Top 28%)4497(Top 80%)
25.2M25.20 mi0.35 mi2139-252031-232031-234169(Top 15%)3525(Top 22%)3525(Top 62%)
Finish26.22 mi1.02 mi2176-372065-342065-343343(Top 12%)2927(Top 18%)2927(Top 52%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21story building
+97ft-345ft

Overall

1552

Males

1475

M18-39

1475

5K→10K

3.1 - 6.2 mi

Top 6%
×5story building
+79ft-138ft

Overall

1767

Males

1680

M18-39

1680

10K→15K

6.2 - 9.3 mi

Top 5%
×3story building
+67ft-78ft

Overall

1552

Males

1475

M18-39

1475

15K→20K

9.3 - 12.4 mi

Top 6%
×5story building
+106ft-86ft

Overall

1667

Males

1585

M18-39

1585

20K→Half

12.4 - 13.1 mi

Top 7%
×2story building
+19ft-37ft

Overall

2118

Males

2022

M18-39

2022

Half→25K

13.1 - 15.5 mi

Top 7%
×4story building
+66ft-88ft

Overall

1942

Males

1848

M18-39

1848

25K→30K

15.5 - 18.6 mi

Top 8%
×9story building
+181ft-148ft

Overall

2329

Males

2207

M18-39

2207

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2750

Males

2575

M18-39

2575

20M→21M

20.0 - 21.0 mi

Top 7%
×8story building
+106ft-24ft

Overall

2118

Males

1983

M18-39

1983

21M→35K

21.0 - 21.8 mi

Top 9%
×7story building
+17ft-86ft

Overall

2680

Males

2478

M18-39

2478

35K→23M

21.8 - 23.0 mi

Top 13%
×5story building
+23ft-63ft

Overall

3737

Males

3360

M18-39

3360

23M→24M

23.0 - 24.0 mi

Top 20%
×6story building
+12ft-82ft

Overall

5665

Males

4690

M18-39

4690

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5437

Males

4497

M18-39

4497

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4169

Males

3525

M18-39

3525

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2story building
+22ft-21ft

Overall

3343

Males

2927

M18-39

2927

Passing Analysis

Category:
Athletes Passed
656
Passed By
849
Net Change
-193
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1983
5K → 10K18951+138#1983#1845
10K → 15K11821+97#1845#1748
15K → 20K6831+37#1748#1711
20K → Half418-14#1711#1725
Half → 25K5256-4#1725#1729
25K → 30K48133-85#1729#1814
30K → 20M2168-47#1814#1861
20M → 21M5026+24#1861#1837
21M → 35K1835-17#1837#1854
35K → 23M2692-66#1854#1920
23M → 24M16122-106#1920#2026
24M → 40K16104-88#2026#2114
40K → 25.2M934-25#2114#2139
25.2M → Finish2158-37#2139#2176
TOTALS656849-193
📊

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