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BOSTON MARATHON 2023

Marco Arellano Alfaro

Bib: 31321•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
10:12/mi
31:41
↑ 97↓ 3451.5%
10K· 6.21 mi
9:39/mi
1:01:39
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:31:32
↑ 67↓ 78
20K· 12.43 mi
9:32/mi
2:01:10
↑ 106↓ 860.1%
Half· 13.11 mi
9:18/mi
2:07:31
↑ 19↓ 370.5%
25K· 15.53 mi
9:33/mi
2:30:40
↑ 66↓ 880.2%
30K· 18.64 mi
9:58/mi
3:01:38
↑ 181↓ 1480.2%
20M
10:09/mi
3:15:26
↑ 64↓ 500.2%
21M
10:35/mi
3:26:01
↑ 106↓ 241.6%
35K· 21.75 mi
9:39/mi
3:33:14
↑ 17↓ 861.7%
23M
10:07/mi
3:45:54
↑ 23↓ 630.6%
24M
9:37/mi
3:55:31
↓ 821.3%
40K· 24.85 mi
9:59/mi
4:04:03
↓ 200.3%
25.2M
12:02/mi
4:08:12
↑ 13↓ 160.2%
Finish· 26.22 mi
9:35/mi
4:17:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:07:31
Pace9:44 /mi
2nd Half
Distance13.11 mi
Time2:10:27
Pace9:57 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2031:4110:1231:41
10:12
-
10K
6.21 mi12:21:181:01:399:5529:58
9:39
-0:33
15K
9.32 mi12:51:111:31:329:4929:53
9:37
-0:02
20K
12.43 mi13:20:492:01:109:4529:38
9:32
-0:05
Half
13.11 mi13:27:102:07:319:446:21
9:18
-0:14
25K
15.53 mi13:50:192:30:409:4223:09
9:33
+0:15
30K
18.64 mi14:21:173:01:389:4530:58
9:58
+0:25
20M
20.00 mi14:35:053:15:269:4613:48
10:09
+0:11
21M
21.00 mi14:45:403:26:019:4910:35
10:35
+0:26
35K
21.75 mi14:52:533:33:149:487:13
9:39
-0:56
23M
23.00 mi15:05:333:45:549:4912:40
10:07
+0:28
24M
24.00 mi15:15:103:55:319:499:37
9:37
-0:30
40K
24.85 mi15:23:424:04:039:498:32
9:59
+0:22
25.2M
25.20 mi15:27:514:08:129:514:09
12:02
+2:03
Finish
26.22 mi15:37:374:17:589:519:46
9:35
-2:27

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

9:18 /mi

Average Pace

9:51 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

6:21

2% of race

Time at Steady Pace

2:50:12

66% of race

Time at Slower Pace

1:21:25

32% of race

Average Pace: 9:50 /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 mi11:51:2031:4110:1231:41
10:12
#23937
10K
6.21 mi12:21:181:01:399:5529:58
9:39
#23434
15K
9.32 mi12:51:111:31:329:4929:53
9:37
#23196
20K
12.43 mi13:20:492:01:109:4529:38
9:32
#22800
Half
13.11 mi13:27:102:07:319:446:21
9:18
#22734
25K
15.53 mi13:50:192:30:409:4223:09
9:33
#22471
30K
18.64 mi14:21:173:01:389:4530:58
9:58
#22199
20M
20.00 mi14:35:053:15:269:4613:48
10:09
#22084
21M
21.00 mi14:45:403:26:019:4910:35
10:35
#21954
35K
21.75 mi14:52:533:33:149:487:13
9:39
#21914
23M
23.00 mi15:05:333:45:549:4912:40
10:07
#21814
24M
24.00 mi15:15:103:55:319:499:37
9:37
#21719
40K
24.85 mi15:23:424:04:039:498:32
9:59
#21667
25.2M
25.20 mi15:27:514:08:129:514:09
12:02
#21679
Finish
26.22 mi15:37:374:17:589:519:46
9:35
#21634
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi23937140581405822565(Top 85%)13438(Top 89%)13438(Top 655%)
10K6.21 mi3.10 mi23434+50313822+23613822+23622916(Top 86%)13599(Top 90%)13599(Top 663%)
15K9.32 mi3.11 mi23196+23813721+10113721+10122565(Top 85%)13438(Top 89%)13438(Top 655%)
20K12.43 mi3.11 mi22800+39613536+18513536+18521670(Top 81%)13039(Top 86%)13039(Top 635%)
Half13.11 mi0.68 mi22734+6613504+3213504+3221520(Top 81%)12974(Top 85%)12974(Top 632%)
25K15.53 mi2.42 mi22471+26313357+14713357+14720993(Top 79%)12708(Top 84%)12708(Top 619%)
30K18.64 mi3.11 mi22199+27213230+12713230+12720935(Top 79%)12606(Top 83%)12606(Top 614%)
20M20.00 mi1.36 mi22084+11513170+6013170+6020887(Top 78%)12521(Top 83%)12521(Top 610%)
21M21.00 mi1.00 mi21954+13013106+6413106+6419847(Top 75%)11987(Top 79%)11987(Top 584%)
35K21.75 mi0.75 mi21914+4013086+2013086+2020298(Top 76%)12172(Top 80%)12172(Top 593%)
23M23.00 mi1.25 mi21814+10013022+6413022+6420337(Top 76%)12169(Top 80%)12169(Top 593%)
24M24.00 mi1.00 mi21719+9512962+6012962+6019629(Top 74%)11838(Top 78%)11838(Top 577%)
40K24.85 mi0.85 mi21667+5212928+3412928+3419904(Top 75%)11876(Top 78%)11876(Top 579%)
25.2M25.20 mi0.35 mi21679-1212925+312925+322543(Top 85%)13098(Top 86%)13098(Top 638%)
Finish26.22 mi1.02 mi21634+4512901+2412901+2420409(Top 77%)12143(Top 80%)12143(Top 592%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22565

Males

13438

M50-54

13438

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

22916

Males

13599

M50-54

13599

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22565

Males

13438

M50-54

13438

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

21670

Males

13039

M50-54

13039

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21520

Males

12974

M50-54

12974

Half→25K

13.1 - 15.5 mi

Top 79%
×4story building
+66ft-88ft

Overall

20993

Males

12708

M50-54

12708

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20935

Males

12606

M50-54

12606

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

20887

Males

12521

M50-54

12521

20M→21M

20.0 - 21.0 mi

Top 75%
×8story building
+106ft-24ft

Overall

19847

Males

11987

M50-54

11987

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20298

Males

12172

M50-54

12172

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20337

Males

12169

M50-54

12169

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19629

Males

11838

M50-54

11838

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

19904

Males

11876

M50-54

11876

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22543

Males

13098

M50-54

13098

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

20409

Males

12143

M50-54

12143

Passing Analysis

Category:
Athletes Passed
2536
Passed By
233
Net Change
+2303
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23937
5K → 10K56057+503#23937#23434
10K → 15K27638+238#23434#23196
15K → 20K4037+396#23196#22800
20K → Half693+66#22800#22734
Half → 25K2696+263#22734#22471
25K → 30K28513+272#22471#22199
30K → 20M13520+115#22199#22084
20M → 21M1366+130#22084#21954
21M → 35K488+40#21954#21914
35K → 23M12020+100#21914#21814
23M → 24M1016+95#21814#21719
24M → 40K6210+52#21719#21667
40K → 25.2M1426-12#21667#21679
25.2M → Finish5813+45#21679#21634
TOTALS2536233+2303
📊

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