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BOSTON MARATHON 2025

Nathan Schaefer

Bib: 2538•M

TX

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 21%
Division (M18-39)
#0 / 5642
Top 44%
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
6:15/mi
19:26
↑ 97↓ 3451.5%
10K· 6.21 mi
6:11/mi
38:38
↑ 79↓ 1380.4%
15K· 9.32 mi
6:12/mi
57:55
↑ 67↓ 78
20K· 12.43 mi
6:16/mi
1:17:23
↑ 106↓ 860.1%
Half· 13.11 mi
6:12/mi
1:21:37
↑ 19↓ 370.5%
25K· 15.53 mi
6:20/mi
1:36:58
↑ 66↓ 880.2%
30K· 18.64 mi
6:30/mi
1:57:09
↑ 181↓ 1480.2%
20M
6:43/mi
2:06:16
↑ 64↓ 500.2%
21M
7:27/mi
2:13:43
↑ 106↓ 241.6%
35K· 21.75 mi
7:05/mi
2:19:01
↑ 17↓ 861.7%
23M
8:08/mi
2:29:12
↑ 23↓ 630.6%
24M
7:53/mi
2:37:05
↓ 821.3%
40K· 24.85 mi
8:33/mi
2:44:24
↓ 200.3%
25.2M
10:15/mi
2:47:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:10/mi
2:56:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:37
Pace6:14 /mi
2nd Half
Distance13.11 mi
Time1:34:38
Pace7:13 /mi
📊Positive Split: 15.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:1519:266:1519:26
6:15
-
10K
6.21 mi10:40:2738:386:1319:12
6:11
-0:04
15K
9.32 mi10:59:4457:556:1319:17
6:12
+0:01
20K
12.43 mi11:19:121:17:236:1419:28
6:16
+0:04
Half
13.11 mi11:23:261:21:376:144:14
6:12
-0:04
25K
15.53 mi11:38:471:36:586:1515:21
6:20
+0:08
30K
18.64 mi11:58:581:57:096:1720:11
6:30
+0:10
20M
20.00 mi12:08:052:06:166:199:07
6:43
+0:13
21M
21.00 mi12:15:322:13:436:227:27
7:27
+0:44
35K
21.75 mi12:20:502:19:016:245:18
7:05
-0:22
23M
23.00 mi12:31:012:29:126:2910:11
8:08
+1:03
24M
24.00 mi12:38:542:37:056:337:53
7:53
-0:15
40K
24.85 mi12:46:132:44:246:377:19
8:33
+0:40
25.2M
25.20 mi12:49:452:47:566:403:32
10:15
+1:42
Finish
26.22 mi12:58:042:56:156:448:19
8:10
-2:05

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

6:11 /mi

Average Pace

6:44 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:11:34

75% of race

Time at Slower Pace

44:41

25% of race

Average Pace: 6:43 /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 mi10:21:1519:266:1519:26
6:15
#2182
10K
6.21 mi10:40:2738:386:1319:12
6:11
#1970
15K
9.32 mi10:59:4457:556:1319:17
6:12
#1915
20K
12.43 mi11:19:121:17:236:1419:28
6:16
#1884
Half
13.11 mi11:23:261:21:376:144:14
6:12
#1895
25K
15.53 mi11:38:471:36:586:1515:21
6:20
#1902
30K
18.64 mi11:58:581:57:096:1720:11
6:30
#1872
20M
20.00 mi12:08:052:06:166:199:07
6:43
#1900
21M
21.00 mi12:15:322:13:436:227:27
7:27
#1995
35K
21.75 mi12:20:502:19:016:245:18
7:05
#2101
23M
23.00 mi12:31:012:29:126:2910:11
8:08
#2457
24M
24.00 mi12:38:542:37:056:337:53
7:53
#2709
40K
24.85 mi12:46:132:44:246:377:19
8:33
#2980
25.2M
25.20 mi12:49:452:47:566:403:32
10:15
#3197
Finish
26.22 mi12:58:042:56:156:448:19
8:10
#3556
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2182208320831903(Top 7%)1812(Top 11%)1812(Top 32%)
10K6.21 mi3.10 mi1970+2121878+2051878+2051813(Top 6%)1722(Top 11%)1722(Top 31%)
15K9.32 mi3.11 mi1915+551821+571821+571903(Top 7%)1812(Top 11%)1812(Top 32%)
20K12.43 mi3.11 mi1884+311795+261795+261875(Top 7%)1786(Top 11%)1786(Top 32%)
Half13.11 mi0.68 mi1895-111806-111806-112060(Top 7%)1969(Top 12%)1969(Top 35%)
25K15.53 mi2.42 mi1902-71812-61812-62041(Top 7%)1945(Top 12%)1945(Top 34%)
30K18.64 mi3.11 mi1872+301783+291783+291981(Top 7%)1884(Top 12%)1884(Top 33%)
20M20.00 mi1.36 mi1900-281808-251808-252520(Top 9%)2374(Top 15%)2374(Top 42%)
21M21.00 mi1.00 mi1995-951898-901898-904363(Top 15%)3907(Top 24%)3907(Top 69%)
35K21.75 mi0.75 mi2101-1062000-1022000-1025887(Top 21%)4986(Top 31%)4986(Top 88%)
23M23.00 mi1.25 mi2457-3562339-3392339-33910921(Top 38%)7697(Top 48%)7697(Top 136%)
24M24.00 mi1.00 mi2709-2522567-2282567-22810401(Top 37%)7368(Top 46%)7368(Top 131%)
40K24.85 mi0.85 mi2980-2712814-2472814-24713735(Top 48%)8860(Top 55%)8860(Top 157%)
25.2M25.20 mi0.35 mi3197-2173009-1953009-19517986(Top 63%)10786(Top 67%)10786(Top 191%)
Finish26.22 mi1.02 mi3556-3593317-3083317-30813961(Top 49%)8981(Top 56%)8981(Top 159%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21story building
+97ft-345ft

Overall

1903

Males

1812

M18-39

1812

5K→10K

3.1 - 6.2 mi

Top 6%
×5story building
+79ft-138ft

Overall

1813

Males

1722

M18-39

1722

10K→15K

6.2 - 9.3 mi

Top 7%
×3story building
+67ft-78ft

Overall

1903

Males

1812

M18-39

1812

15K→20K

9.3 - 12.4 mi

Top 7%
×5story building
+106ft-86ft

Overall

1875

Males

1786

M18-39

1786

20K→Half

12.4 - 13.1 mi

Top 7%
×2story building
+19ft-37ft

Overall

2060

Males

1969

M18-39

1969

Half→25K

13.1 - 15.5 mi

Top 7%
×4story building
+66ft-88ft

Overall

2041

Males

1945

M18-39

1945

25K→30K

15.5 - 18.6 mi

Top 7%
×9story building
+181ft-148ft

Overall

1981

Males

1884

M18-39

1884

30K→20M

18.6 - 20.0 mi

Top 9%
×5story building
+64ft-50ft

Overall

2520

Males

2374

M18-39

2374

20M→21M

20.0 - 21.0 mi

Top 15%
×8story building
+106ft-24ft

Overall

4363

Males

3907

M18-39

3907

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5887

Males

4986

M18-39

4986

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10921

Males

7697

M18-39

7697

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

10401

Males

7368

M18-39

7368

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13735

Males

8860

M18-39

8860

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17986

Males

10786

M18-39

10786

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

13961

Males

8981

M18-39

8981

Passing Analysis

Category:
Athletes Passed
634
Passed By
2008
Net Change
-1374
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2182
5K → 10K25341+212#2182#1970
10K → 15K8934+55#1970#1915
15K → 20K7746+31#1915#1884
20K → Half516-11#1884#1895
Half → 25K4148-7#1895#1902
25K → 30K9767+30#1902#1872
30K → 20M2351-28#1872#1900
20M → 21M13108-95#1900#1995
21M → 35K13119-106#1995#2101
35K → 23M5361-356#2101#2457
23M → 24M9261-252#2457#2709
24M → 40K4275-271#2709#2980
40K → 25.2M2219-217#2980#3197
25.2M → Finish3362-359#3197#3556
TOTALS6342008-1374
📊

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