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BOSTON MARATHON 2025

Jason Nolff

Bib: 11855•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
8:05/mi
25:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:05/mi
50:14
↑ 79↓ 1380.4%
15K· 9.32 mi
8:06/mi
1:15:25
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:40:23
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:45:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:05:20
↑ 66↓ 880.2%
30K· 18.64 mi
8:13/mi
2:30:52
↑ 181↓ 1480.2%
20M
8:21/mi
2:42:13
↑ 64↓ 500.2%
21M
8:59/mi
2:51:12
↑ 106↓ 241.6%
35K· 21.75 mi
7:57/mi
2:57:09
↑ 17↓ 861.7%
23M
8:21/mi
3:07:36
↑ 23↓ 630.6%
24M
8:16/mi
3:15:52
↓ 821.3%
40K· 24.85 mi
8:31/mi
3:23:09
↓ 200.3%
25.2M
9:17/mi
3:26:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:18/mi
3:34:48
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:50
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:48:58
Pace8:19 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:3325:088:0525:08
8:05
-
10K
6.21 mi11:18:3950:148:0525:06
8:05
0:00
15K
9.32 mi11:43:501:15:258:0525:11
8:06
+0:01
20K
12.43 mi12:08:481:40:238:0524:58
8:02
-0:04
Half
13.11 mi12:14:151:45:508:045:27
7:59
-0:03
25K
15.53 mi12:33:452:05:208:0419:30
8:03
+0:04
30K
18.64 mi12:59:172:30:528:0625:32
8:13
+0:10
20M
20.00 mi13:10:382:42:138:0711:21
8:21
+0:08
21M
21.00 mi13:19:372:51:128:098:59
8:59
+0:38
35K
21.75 mi13:25:342:57:098:095:57
7:57
-1:02
23M
23.00 mi13:36:013:07:368:0910:27
8:21
+0:24
24M
24.00 mi13:44:173:15:528:108:16
8:16
-0:05
40K
24.85 mi13:51:343:23:098:107:17
8:31
+0:15
25.2M
25.20 mi13:54:463:26:218:113:12
9:17
+0:46
Finish
26.22 mi14:03:133:34:488:128:27
8:18
-0:59

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

7:57 /mi

Average Pace

8:12 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:37

94% of race

Time at Steady Pace

12:11

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /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 mi10:53:3325:088:0525:08
8:05
#17269
10K
6.21 mi11:18:3950:148:0525:06
8:05
#17145
15K
9.32 mi11:43:501:15:258:0525:11
8:06
#17012
20K
12.43 mi12:08:481:40:238:0524:58
8:02
#16508
Half
13.11 mi12:14:151:45:508:045:27
7:59
#16471
25K
15.53 mi12:33:452:05:208:0419:30
8:03
#16085
30K
18.64 mi12:59:172:30:528:0625:32
8:13
#15452
20M
20.00 mi13:10:382:42:138:0711:21
8:21
#15226
21M
21.00 mi13:19:372:51:128:098:59
8:59
#15045
35K
21.75 mi13:25:342:57:098:095:57
7:57
#14913
23M
23.00 mi13:36:013:07:368:0910:27
8:21
#14710
24M
24.00 mi13:44:173:15:528:108:16
8:16
#14618
40K
24.85 mi13:51:343:23:098:107:17
8:31
#14553
25.2M
25.20 mi13:54:463:26:218:113:12
9:17
#14520
Finish
26.22 mi14:03:133:34:488:128:27
8:18
#14515
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi17269113141131416757(Top 59%)11117(Top 69%)11117(Top 557%)
10K6.21 mi3.10 mi17145+12411279+3511279+3517044(Top 60%)11261(Top 70%)11261(Top 564%)
15K9.32 mi3.11 mi17012+13311239+4011239+4016757(Top 59%)11117(Top 69%)11117(Top 557%)
20K12.43 mi3.11 mi16508+50411021+21811021+21815180(Top 53%)10397(Top 65%)10397(Top 521%)
Half13.11 mi0.68 mi16471+3711001+2011001+2015741(Top 55%)10659(Top 66%)10659(Top 534%)
25K15.53 mi2.42 mi16085+38610826+17510826+17514216(Top 50%)9860(Top 61%)9860(Top 494%)
30K18.64 mi3.11 mi15452+63310488+33810488+33812951(Top 46%)9118(Top 57%)9118(Top 457%)
20M20.00 mi1.36 mi15226+22610358+13010358+13012837(Top 45%)8932(Top 55%)8932(Top 447%)
21M21.00 mi1.00 mi15045+18110252+10610252+10613387(Top 47%)9046(Top 56%)9046(Top 453%)
35K21.75 mi0.75 mi14913+13210183+6910183+6911931(Top 42%)8301(Top 52%)8301(Top 416%)
23M23.00 mi1.25 mi14710+20310062+12110062+12112313(Top 43%)8383(Top 52%)8383(Top 420%)
24M24.00 mi1.00 mi14618+929994+689994+6813017(Top 46%)8664(Top 54%)8664(Top 434%)
40K24.85 mi0.85 mi14553+659936+589936+5813538(Top 48%)8782(Top 55%)8782(Top 440%)
25.2M25.20 mi0.35 mi14520+339905+319905+3113318(Top 47%)8624(Top 54%)8624(Top 432%)
Finish26.22 mi1.02 mi14515+59871+349871+3414846(Top 52%)9416(Top 58%)9416(Top 472%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

16757

Males

11117

M50-54

11117

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

17044

Males

11261

M50-54

11261

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

16757

Males

11117

M50-54

11117

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

15180

Males

10397

M50-54

10397

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

15741

Males

10659

M50-54

10659

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14216

Males

9860

M50-54

9860

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

12951

Males

9118

M50-54

9118

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12837

Males

8932

M50-54

8932

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13387

Males

9046

M50-54

9046

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11931

Males

8301

M50-54

8301

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12313

Males

8383

M50-54

8383

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

13017

Males

8664

M50-54

8664

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13538

Males

8782

M50-54

8782

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13318

Males

8624

M50-54

8624

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

14846

Males

9416

M50-54

9416

Passing Analysis

Category:
Athletes Passed
3450
Passed By
696
Net Change
+2754
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17269
5K → 10K365241+124#17269#17145
10K → 15K268135+133#17145#17012
15K → 20K53228+504#17012#16508
20K → Half5720+37#16508#16471
Half → 25K39913+386#16471#16085
25K → 30K64310+633#16085#15452
30K → 20M24923+226#15452#15226
20M → 21M21433+181#15226#15045
21M → 35K1375+132#15045#14913
35K → 23M22926+203#14913#14710
23M → 24M11927+92#14710#14618
24M → 40K10641+65#14618#14553
40K → 25.2M4916+33#14553#14520
25.2M → Finish8378+5#14520#14515
TOTALS3450696+2754
📊

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