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BOSTON MARATHON 2023

Alfonso Sanz

Bib: 5122•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 28%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:01/mi
21:47
↑ 97↓ 3451.5%
10K· 6.21 mi
7:02/mi
43:38
↑ 79↓ 1380.4%
15K· 9.32 mi
7:02/mi
1:05:29
↑ 67↓ 78
20K· 12.43 mi
6:57/mi
1:27:04
↑ 106↓ 860.1%
Half· 13.11 mi
6:50/mi
1:31:44
↑ 19↓ 370.5%
25K· 15.53 mi
6:50/mi
1:48:19
↑ 66↓ 880.2%
30K· 18.64 mi
6:57/mi
2:09:54
↑ 181↓ 1480.2%
20M
6:55/mi
2:19:18
↑ 64↓ 500.2%
21M
7:12/mi
2:26:30
↑ 106↓ 241.6%
35K· 21.75 mi
6:45/mi
2:31:33
↑ 17↓ 861.7%
23M
6:57/mi
2:40:15
↑ 23↓ 630.6%
24M
6:46/mi
2:47:01
↓ 821.3%
40K· 24.85 mi
6:49/mi
2:52:51
↓ 200.3%
25.2M
7:15/mi
2:55:21
↑ 13↓ 160.2%
Finish· 26.22 mi
6:43/mi
3:02:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:31:44
Pace7:00 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:30:28
Pace6:54 /mi
📊Negative Split: 1.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2221:477:0121:47
7:01
-
10K
6.21 mi10:46:1343:387:0121:51
7:02
+0:01
15K
9.32 mi11:08:041:05:297:0221:51
7:02
0:00
20K
12.43 mi11:29:391:27:047:0021:35
6:57
-0:05
Half
13.11 mi11:34:191:31:447:004:40
6:50
-0:07
25K
15.53 mi11:50:541:48:196:5816:35
6:50
0:00
30K
18.64 mi12:12:292:09:546:5821:35
6:57
+0:07
20M
20.00 mi12:21:532:19:186:589:24
6:55
-0:02
21M
21.00 mi12:29:052:26:306:597:12
7:12
+0:17
35K
21.75 mi12:34:082:31:336:585:03
6:45
-0:27
23M
23.00 mi12:42:502:40:156:588:42
6:57
+0:12
24M
24.00 mi12:49:362:47:016:586:46
6:46
-0:11
40K
24.85 mi12:55:262:52:516:575:50
6:49
+0:03
25.2M
25.20 mi12:57:562:55:216:582:30
7:15
+0:26
Finish
26.22 mi13:04:473:02:126:576:51
6:43
-0:32

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

6:43 /mi

Average Pace

6:57 /mi

Slowest Pace

7:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:30

95% of race

Time at Steady Pace

9:42

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:57 /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 mi10:24:2221:477:0121:47
7:01
#6303
10K
6.21 mi10:46:1343:387:0121:51
7:02
#6620
15K
9.32 mi11:08:041:05:297:0221:51
7:02
#6651
20K
12.43 mi11:29:391:27:047:0021:35
6:57
#6380
Half
13.11 mi11:34:191:31:447:004:40
6:50
#6343
25K
15.53 mi11:50:541:48:196:5816:35
6:50
#6044
30K
18.64 mi12:12:292:09:546:5821:35
6:57
#5630
20M
20.00 mi12:21:532:19:186:589:24
6:55
#5446
21M
21.00 mi12:29:052:26:306:597:12
7:12
#5256
35K
21.75 mi12:34:082:31:336:585:03
6:45
#5177
23M
23.00 mi12:42:502:40:156:588:42
6:57
#5034
24M
24.00 mi12:49:362:47:016:586:46
6:46
#4912
40K
24.85 mi12:55:262:52:516:575:50
6:49
#4802
25.2M
25.20 mi12:57:562:55:216:582:30
7:15
#4749
Finish
26.22 mi13:04:473:02:126:576:51
6:43
#4664
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6303573957396757(Top 25%)6055(Top 40%)6055(Top 115%)
10K6.21 mi3.10 mi6620-3175969-2305969-2307028(Top 26%)6256(Top 41%)6256(Top 118%)
15K9.32 mi3.11 mi6651-315991-225991-226757(Top 25%)6055(Top 40%)6055(Top 115%)
20K12.43 mi3.11 mi6380+2715767+2245767+2245637(Top 21%)5174(Top 34%)5174(Top 98%)
Half13.11 mi0.68 mi6343+375738+295738+295537(Top 21%)5097(Top 34%)5097(Top 96%)
25K15.53 mi2.42 mi6044+2995515+2235515+2234506(Top 17%)4198(Top 28%)4198(Top 79%)
30K18.64 mi3.11 mi5630+4145169+3465169+3463999(Top 15%)3738(Top 25%)3738(Top 71%)
20M20.00 mi1.36 mi5446+1845011+1585011+1583555(Top 13%)3320(Top 22%)3320(Top 63%)
21M21.00 mi1.00 mi5256+1904845+1664845+1663127(Top 12%)2931(Top 19%)2931(Top 55%)
35K21.75 mi0.75 mi5177+794772+734772+733890(Top 15%)3584(Top 24%)3584(Top 68%)
23M23.00 mi1.25 mi5034+1434639+1334639+1333533(Top 13%)3274(Top 22%)3274(Top 62%)
24M24.00 mi1.00 mi4912+1224537+1024537+1023493(Top 13%)3218(Top 21%)3218(Top 61%)
40K24.85 mi0.85 mi4802+1104442+954442+952969(Top 11%)2736(Top 18%)2736(Top 52%)
25.2M25.20 mi0.35 mi4749+534394+484394+482773(Top 10%)2559(Top 17%)2559(Top 48%)
Finish26.22 mi1.02 mi4664+854317+774317+773637(Top 14%)3251(Top 21%)3251(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

6757

Males

6055

M18-39

6055

5K→10K

3.1 - 6.2 mi

Top 26%
×5story building
+79ft-138ft

Overall

7028

Males

6256

M18-39

6256

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

6757

Males

6055

M18-39

6055

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5637

Males

5174

M18-39

5174

20K→Half

12.4 - 13.1 mi

Top 21%
×2story building
+19ft-37ft

Overall

5537

Males

5097

M18-39

5097

Half→25K

13.1 - 15.5 mi

Top 17%
×4story building
+66ft-88ft

Overall

4506

Males

4198

M18-39

4198

25K→30K

15.5 - 18.6 mi

Top 15%
×9story building
+181ft-148ft

Overall

3999

Males

3738

M18-39

3738

30K→20M

18.6 - 20.0 mi

Top 13%
×5story building
+64ft-50ft

Overall

3555

Males

3320

M18-39

3320

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3127

Males

2931

M18-39

2931

21M→35K

21.0 - 21.8 mi

Top 15%
×7story building
+17ft-86ft

Overall

3890

Males

3584

M18-39

3584

35K→23M

21.8 - 23.0 mi

Top 13%
×5story building
+23ft-63ft

Overall

3533

Males

3274

M18-39

3274

23M→24M

23.0 - 24.0 mi

Top 13%
×6story building
+12ft-82ft

Overall

3493

Males

3218

M18-39

3218

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

2969

Males

2736

M18-39

2736

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2773

Males

2559

M18-39

2559

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2story building
+22ft-21ft

Overall

3637

Males

3251

M18-39

3251

Passing Analysis

Category:
Athletes Passed
2220
Passed By
581
Net Change
+1639
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6303
5K → 10K73390-317#6303#6620
10K → 15K95126-31#6620#6651
15K → 20K28413+271#6651#6380
20K → Half403+37#6380#6343
Half → 25K3023+299#6343#6044
25K → 30K4195+414#6044#5630
30K → 20M1840+184#5630#5446
20M → 21M1900+190#5446#5256
21M → 35K823+79#5256#5177
35K → 23M15411+143#5177#5034
23M → 24M1242+122#5034#4912
24M → 40K1155+110#4912#4802
40K → 25.2M541+53#4802#4749
25.2M → Finish10419+85#4749#4664
TOTALS2220581+1639
📊

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