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BOSTON MARATHON 2025

Nicholas Nebolsine

Bib: 12354•M

VA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 24%
Gender (Male)
#0 / 16105
Top 37%
Masters (Masters Men)
#0 / 10463
Top 23%
Division (M50-54)
#0 / 1996
Top 19%
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
7:08/mi
22:11
↑ 97↓ 3451.5%
10K· 6.21 mi
7:07/mi
44:19
↑ 79↓ 1380.4%
15K· 9.32 mi
7:05/mi
1:06:20
↑ 67↓ 78
20K· 12.43 mi
7:13/mi
1:28:46
↑ 106↓ 860.1%
Half· 13.11 mi
7:08/mi
1:33:38
↑ 19↓ 370.5%
25K· 15.53 mi
7:14/mi
1:51:11
↑ 66↓ 880.2%
30K· 18.64 mi
7:13/mi
2:13:37
↑ 181↓ 1480.2%
20M
7:19/mi
2:23:34
↑ 64↓ 500.2%
21M
7:43/mi
2:31:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:17/mi
2:36:44
↑ 17↓ 861.7%
23M
7:22/mi
2:45:58
↑ 23↓ 630.6%
24M
7:13/mi
2:53:11
↓ 821.3%
40K· 24.85 mi
7:17/mi
2:59:25
↓ 200.3%
25.2M
7:53/mi
3:02:08
↑ 13↓ 160.2%
Finish· 26.22 mi
7:13/mi
3:09:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:38
Pace7:09 /mi
2nd Half
Distance13.11 mi
Time1:35:51
Pace7:19 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0122:117:0822:11
7:08
-
10K
6.21 mi11:12:0944:197:0822:08
7:07
-0:01
15K
9.32 mi11:34:101:06:207:0722:01
7:05
-0:02
20K
12.43 mi11:56:361:28:467:0922:26
7:13
+0:08
Half
13.11 mi12:01:281:33:387:094:52
7:08
-0:05
25K
15.53 mi12:19:011:51:117:0917:33
7:14
+0:06
30K
18.64 mi12:41:272:13:377:1022:26
7:13
-0:01
20M
20.00 mi12:51:242:23:347:119:57
7:19
+0:06
21M
21.00 mi12:59:072:31:177:127:43
7:43
+0:24
35K
21.75 mi13:04:342:36:447:125:27
7:17
-0:26
23M
23.00 mi13:13:482:45:587:139:14
7:22
+0:05
24M
24.00 mi13:21:012:53:117:137:13
7:13
-0:09
40K
24.85 mi13:27:152:59:257:136:14
7:17
+0:04
25.2M
25.20 mi13:29:583:02:087:142:43
7:53
+0:36
Finish
26.22 mi13:37:193:09:297:147:21
7:13
-0:40

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

7:05 /mi

Average Pace

7:14 /mi

Slowest Pace

7:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:46

99% of race

Time at Steady Pace

2:43

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:50:0122:117:0822:11
7:08
#8953
10K
6.21 mi11:12:0944:197:0822:08
7:07
#8879
15K
9.32 mi11:34:101:06:207:0722:01
7:05
#8628
20K
12.43 mi11:56:361:28:467:0922:26
7:13
#8483
Half
13.11 mi12:01:281:33:387:094:52
7:08
#8477
25K
15.53 mi12:19:011:51:117:0917:33
7:14
#8337
30K
18.64 mi12:41:272:13:377:1022:26
7:13
#7803
20M
20.00 mi12:51:242:23:347:119:57
7:19
#7589
21M
21.00 mi12:59:072:31:177:127:43
7:43
#7413
35K
21.75 mi13:04:342:36:447:125:27
7:17
#7360
23M
23.00 mi13:13:482:45:587:139:14
7:22
#7208
24M
24.00 mi13:21:012:53:117:137:13
7:13
#7109
40K
24.85 mi13:27:152:59:257:136:14
7:17
#6998
25.2M
25.20 mi13:29:583:02:087:142:43
7:53
#6955
Finish
26.22 mi13:37:193:09:297:147:21
7:13
#6900
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8953757975798239(Top 29%)7084(Top 44%)7084(Top 355%)
10K6.21 mi3.10 mi8879+747520+597520+598855(Top 31%)7511(Top 47%)7511(Top 376%)
15K9.32 mi3.11 mi8628+2517358+1627358+1628239(Top 29%)7084(Top 44%)7084(Top 355%)
20K12.43 mi3.11 mi8483+1457247+1117247+1118360(Top 29%)7081(Top 44%)7081(Top 355%)
Half13.11 mi0.68 mi8477+67244+37244+38487(Top 30%)7170(Top 45%)7170(Top 359%)
25K15.53 mi2.42 mi8337+1407134+1107134+1107880(Top 28%)6688(Top 42%)6688(Top 335%)
30K18.64 mi3.11 mi7803+5346755+3796755+3796020(Top 21%)5321(Top 33%)5321(Top 267%)
20M20.00 mi1.36 mi7589+2146581+1746581+1745938(Top 21%)5161(Top 32%)5161(Top 259%)
21M21.00 mi1.00 mi7413+1766433+1486433+1485743(Top 20%)4903(Top 30%)4903(Top 246%)
35K21.75 mi0.75 mi7360+536372+616372+617124(Top 25%)5776(Top 36%)5776(Top 289%)
23M23.00 mi1.25 mi7208+1526229+1436229+1435893(Top 21%)4907(Top 30%)4907(Top 246%)
24M24.00 mi1.00 mi7109+996137+926137+925926(Top 21%)4874(Top 30%)4874(Top 244%)
40K24.85 mi0.85 mi6998+1116036+1016036+1015609(Top 20%)4628(Top 29%)4628(Top 232%)
25.2M25.20 mi0.35 mi6955+435996+405996+405303(Top 19%)4324(Top 27%)4324(Top 217%)
Finish26.22 mi1.02 mi6900+555926+705926+707110(Top 25%)5397(Top 34%)5397(Top 270%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

8239

Males

7084

M50-54

7084

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8855

Males

7511

M50-54

7511

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

8239

Males

7084

M50-54

7084

15K→20K

9.3 - 12.4 mi

Top 29%
×5story building
+106ft-86ft

Overall

8360

Males

7081

M50-54

7081

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

8487

Males

7170

M50-54

7170

Half→25K

13.1 - 15.5 mi

Top 28%
×4story building
+66ft-88ft

Overall

7880

Males

6688

M50-54

6688

25K→30K

15.5 - 18.6 mi

Top 21%
×9story building
+181ft-148ft

Overall

6020

Males

5321

M50-54

5321

30K→20M

18.6 - 20.0 mi

Top 21%
×5story building
+64ft-50ft

Overall

5938

Males

5161

M50-54

5161

20M→21M

20.0 - 21.0 mi

Top 20%
×8story building
+106ft-24ft

Overall

5743

Males

4903

M50-54

4903

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

7124

Males

5776

M50-54

5776

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

5893

Males

4907

M50-54

4907

23M→24M

23.0 - 24.0 mi

Top 21%
×6story building
+12ft-82ft

Overall

5926

Males

4874

M50-54

4874

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5609

Males

4628

M50-54

4628

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5303

Males

4324

M50-54

4324

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2story building
+22ft-21ft

Overall

7110

Males

5397

M50-54

5397

Passing Analysis

Category:
Athletes Passed
2612
Passed By
559
Net Change
+2053
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8953
5K → 10K254180+74#8953#8879
10K → 15K30554+251#8879#8628
15K → 20K247102+145#8628#8483
20K → Half3832+6#8483#8477
Half → 25K18747+140#8477#8337
25K → 30K5417+534#8337#7803
30K → 20M2217+214#7803#7589
20M → 21M1826+176#7589#7413
21M → 35K8027+53#7413#7360
35K → 23M16816+152#7360#7208
23M → 24M11920+99#7208#7109
24M → 40K12514+111#7109#6998
40K → 25.2M496+43#6998#6955
25.2M → Finish9641+55#6955#6900
TOTALS2612559+2053
📊

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