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BOSTON MARATHON 2025

Cesar Sosa Nunez

Bib: 31646•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
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
8:17/mi
25:43
↑ 97↓ 3451.5%
10K· 6.21 mi
8:15/mi
51:20
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:17:20
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:43:43
↑ 106↓ 860.1%
Half· 13.11 mi
8:18/mi
1:49:23
↑ 19↓ 370.5%
25K· 15.53 mi
8:32/mi
2:10:05
↑ 66↓ 880.2%
30K· 18.64 mi
9:04/mi
2:38:14
↑ 181↓ 1480.2%
20M
8:58/mi
2:50:25
↑ 64↓ 500.2%
21M
9:46/mi
3:00:11
↑ 106↓ 241.6%
35K· 21.75 mi
8:57/mi
3:06:53
↑ 17↓ 861.7%
23M
8:42/mi
3:17:47
↑ 23↓ 630.6%
24M
8:47/mi
3:26:34
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:33:52
↓ 200.3%
25.2M
9:46/mi
3:37:14
↑ 13↓ 160.2%
Finish· 26.22 mi
8:28/mi
3:45:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:23
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time1:56:29
Pace8:53 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1825:438:1725:43
8:17
-
10K
6.21 mi12:13:5551:208:1625:37
8:15
-0:02
15K
9.32 mi12:39:551:17:208:1826:00
8:22
+0:07
20K
12.43 mi13:06:181:43:438:2126:23
8:30
+0:08
Half
13.11 mi13:11:581:49:238:215:40
8:18
-0:12
25K
15.53 mi13:32:402:10:058:2220:42
8:32
+0:14
30K
18.64 mi14:00:492:38:148:2928:09
9:04
+0:32
20M
20.00 mi14:13:002:50:258:3112:11
8:58
-0:06
21M
21.00 mi14:22:463:00:118:359:46
9:46
+0:48
35K
21.75 mi14:29:283:06:538:366:42
8:57
-0:49
23M
23.00 mi14:40:223:17:478:3610:54
8:42
-0:15
24M
24.00 mi14:49:093:26:348:368:47
8:47
+0:05
40K
24.85 mi14:56:273:33:528:367:18
8:32
-0:15
25.2M
25.20 mi14:59:493:37:148:373:22
9:46
+1:14
Finish
26.22 mi15:08:273:45:528:378:38
8:28
-1:18

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

8:15 /mi

Average Pace

8:37 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:32:44

94% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

13:08

6% of race

Average Pace: 8:37 /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 mi11:48:1825:438:1725:43
8:17
#18565
10K
6.21 mi12:13:5551:208:1625:37
8:15
#18380
15K
9.32 mi12:39:551:17:208:1826:00
8:22
#18381
20K
12.43 mi13:06:181:43:438:2126:23
8:30
#18280
Half
13.11 mi13:11:581:49:238:215:40
8:18
#18259
25K
15.53 mi13:32:402:10:058:2220:42
8:32
#18084
30K
18.64 mi14:00:492:38:148:2928:09
9:04
#18025
20M
20.00 mi14:13:002:50:258:3112:11
8:58
#17911
21M
21.00 mi14:22:463:00:118:359:46
9:46
#17895
35K
21.75 mi14:29:283:06:538:366:42
8:57
#17873
23M
23.00 mi14:40:223:17:478:3610:54
8:42
#17659
24M
24.00 mi14:49:093:26:348:368:47
8:47
#17584
40K
24.85 mi14:56:273:33:528:367:18
8:32
#17439
25.2M
25.20 mi14:59:493:37:148:373:22
9:46
#17420
Finish
26.22 mi15:08:273:45:528:378:38
8:28
#17348
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi18565118431184318493(Top 65%)11835(Top 73%)11835(Top 496%)
10K6.21 mi3.10 mi18380+18511778+6511778+6518193(Top 64%)11726(Top 73%)11726(Top 491%)
15K9.32 mi3.11 mi18381-111772+611772+618493(Top 65%)11835(Top 73%)11835(Top 496%)
20K12.43 mi3.11 mi18280+10111728+4411728+4418162(Top 64%)11681(Top 73%)11681(Top 490%)
Half13.11 mi0.68 mi18259+2111716+1211716+1217923(Top 63%)11593(Top 72%)11593(Top 486%)
25K15.53 mi2.42 mi18084+17511624+9211624+9217398(Top 61%)11271(Top 70%)11271(Top 472%)
30K18.64 mi3.11 mi18025+5911560+6411560+6417968(Top 63%)11360(Top 71%)11360(Top 476%)
20M20.00 mi1.36 mi17911+11411489+7111489+7116596(Top 58%)10638(Top 66%)10638(Top 446%)
21M21.00 mi1.00 mi17895+1611471+1811471+1817316(Top 61%)10832(Top 67%)10832(Top 454%)
35K21.75 mi0.75 mi17873+2211448+2311448+2317995(Top 63%)11048(Top 69%)11048(Top 463%)
23M23.00 mi1.25 mi17659+21411302+14611302+14614582(Top 51%)9438(Top 59%)9438(Top 396%)
24M24.00 mi1.00 mi17584+7511239+6311239+6316207(Top 57%)10122(Top 63%)10122(Top 424%)
40K24.85 mi0.85 mi17439+14511149+9011149+9013670(Top 48%)8851(Top 55%)8851(Top 371%)
25.2M25.20 mi0.35 mi17420+1911131+1811131+1815882(Top 56%)9819(Top 61%)9819(Top 412%)
Finish26.22 mi1.02 mi17348+7211078+5311078+5316025(Top 56%)9957(Top 62%)9957(Top 417%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18493

Males

11835

M45-49

11835

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18193

Males

11726

M45-49

11726

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18493

Males

11835

M45-49

11835

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18162

Males

11681

M45-49

11681

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17923

Males

11593

M45-49

11593

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17398

Males

11271

M45-49

11271

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17968

Males

11360

M45-49

11360

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

16596

Males

10638

M45-49

10638

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17316

Males

10832

M45-49

10832

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

17995

Males

11048

M45-49

11048

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14582

Males

9438

M45-49

9438

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

16207

Males

10122

M45-49

10122

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13670

Males

8851

M45-49

8851

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15882

Males

9819

M45-49

9819

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

16025

Males

9957

M45-49

9957

Passing Analysis

Category:
Athletes Passed
2355
Passed By
1138
Net Change
+1217
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18565
5K → 10K355170+185#18565#18380
10K → 15K189190-1#18380#18381
15K → 20K242141+101#18381#18280
20K → Half5130+21#18280#18259
Half → 25K25580+175#18259#18084
25K → 30K267208+59#18084#18025
30K → 20M17662+114#18025#17911
20M → 21M10690+16#17911#17895
21M → 35K7452+22#17895#17873
35K → 23M23319+214#17873#17659
23M → 24M11843+75#17659#17584
24M → 40K1549+145#17584#17439
40K → 25.2M3718+19#17439#17420
25.2M → Finish9826+72#17420#17348
TOTALS23551138+1217
📊

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