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BOSTON MARATHON 2023

David Costi

Bib: 13164•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 44%
Division (M50-54)
#0 / 2052
Top 45%
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
7:31/mi
23:21
↑ 97↓ 3451.5%
10K· 6.21 mi
7:13/mi
45:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:20/mi
1:08:33
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:31:37
↑ 106↓ 860.1%
Half· 13.11 mi
7:24/mi
1:36:40
↑ 19↓ 370.5%
25K· 15.53 mi
7:39/mi
1:55:12
↑ 66↓ 880.2%
30K· 18.64 mi
8:09/mi
2:20:31
↑ 181↓ 1480.2%
20M
8:32/mi
2:32:07
↑ 64↓ 500.2%
21M
9:12/mi
2:41:19
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
2:47:30
↑ 17↓ 861.7%
23M
8:45/mi
2:58:27
↑ 23↓ 630.6%
24M
8:15/mi
3:06:42
↓ 821.3%
40K· 24.85 mi
8:12/mi
3:13:43
↓ 200.3%
25.2M
8:59/mi
3:16:49
↑ 13↓ 160.2%
Finish· 26.22 mi
7:52/mi
3:24:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:40
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:48:10
Pace8:15 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5623:217:3123:21
7:31
-
10K
6.21 mi11:14:2245:477:2222:26
7:13
-0:18
15K
9.32 mi11:37:081:08:337:2122:46
7:20
+0:07
20K
12.43 mi12:00:121:31:377:2223:04
7:25
+0:05
Half
13.11 mi12:05:151:36:407:225:03
7:24
-0:01
25K
15.53 mi12:23:471:55:127:2518:32
7:39
+0:15
30K
18.64 mi12:49:062:20:317:3225:19
8:09
+0:30
20M
20.00 mi13:00:422:32:077:3611:36
8:32
+0:23
21M
21.00 mi13:09:542:41:197:419:12
9:12
+0:40
35K
21.75 mi13:16:052:47:307:426:11
8:16
-0:56
23M
23.00 mi13:27:022:58:277:4610:57
8:45
+0:29
24M
24.00 mi13:35:173:06:427:478:15
8:15
-0:30
40K
24.85 mi13:42:183:13:437:487:01
8:12
-0:03
25.2M
25.20 mi13:45:243:16:497:493:06
8:59
+0:47
Finish
26.22 mi13:53:253:24:507:498:01
7:52
-1:07

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

7:13 /mi

Average Pace

7:49 /mi

Slowest Pace

9:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:12

56% of race

Time at Steady Pace

54:47

27% of race

Time at Slower Pace

34:51

17% of race

Average Pace: 7:49 /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 mi10:51:5623:217:3123:21
7:31
#9752
10K
6.21 mi11:14:2245:477:2222:26
7:13
#8949
15K
9.32 mi11:37:081:08:337:2122:46
7:20
#8870
20K
12.43 mi12:00:121:31:377:2223:04
7:25
#8779
Half
13.11 mi12:05:151:36:407:225:03
7:24
#8808
25K
15.53 mi12:23:471:55:127:2518:32
7:39
#8943
30K
18.64 mi12:49:062:20:317:3225:19
8:09
#9466
20M
20.00 mi13:00:422:32:077:3611:36
8:32
#9778
21M
21.00 mi13:09:542:41:197:419:12
9:12
#10067
35K
21.75 mi13:16:052:47:307:426:11
8:16
#10211
23M
23.00 mi13:27:022:58:277:4610:57
8:45
#10461
24M
24.00 mi13:35:173:06:427:478:15
8:15
#10577
40K
24.85 mi13:42:183:13:437:487:01
8:12
#10581
25.2M
25.20 mi13:45:243:16:497:493:06
8:59
#10605
Finish
26.22 mi13:53:253:24:507:498:01
7:52
#10595
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9752801080108789(Top 33%)7418(Top 49%)7418(Top 362%)
10K6.21 mi3.10 mi8949+8037548+4627548+4628255(Top 31%)7123(Top 47%)7123(Top 347%)
15K9.32 mi3.11 mi8870+797486+627486+628789(Top 33%)7418(Top 49%)7418(Top 362%)
20K12.43 mi3.11 mi8779+917424+627424+628708(Top 33%)7323(Top 48%)7323(Top 357%)
Half13.11 mi0.68 mi8808-297435-117435-119436(Top 35%)7786(Top 51%)7786(Top 379%)
25K15.53 mi2.42 mi8943-1357505-707505-709872(Top 37%)7914(Top 52%)7914(Top 386%)
30K18.64 mi3.11 mi9466-5237781-2767781-27611973(Top 45%)8784(Top 58%)8784(Top 428%)
20M20.00 mi1.36 mi9778-3127947-1667947-16613822(Top 52%)9487(Top 63%)9487(Top 462%)
21M21.00 mi1.00 mi10067-2898076-1298076-12914444(Top 54%)9684(Top 64%)9684(Top 472%)
35K21.75 mi0.75 mi10211-1448135-598135-5913842(Top 52%)9331(Top 61%)9331(Top 455%)
23M23.00 mi1.25 mi10461-2508216-818216-8114637(Top 55%)9639(Top 64%)9639(Top 470%)
24M24.00 mi1.00 mi10577-1168243-278243-2712899(Top 48%)8791(Top 58%)8791(Top 428%)
40K24.85 mi0.85 mi10581-48210+338210+3311375(Top 43%)8009(Top 53%)8009(Top 390%)
25.2M25.20 mi0.35 mi10605-248218-88218-812374(Top 46%)8437(Top 56%)8437(Top 411%)
Finish26.22 mi1.02 mi10595+108189+298189+2911128(Top 42%)7852(Top 52%)7852(Top 383%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8789

Males

7418

M50-54

7418

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8255

Males

7123

M50-54

7123

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8789

Males

7418

M50-54

7418

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8708

Males

7323

M50-54

7323

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9436

Males

7786

M50-54

7786

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9872

Males

7914

M50-54

7914

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

11973

Males

8784

M50-54

8784

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13822

Males

9487

M50-54

9487

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14444

Males

9684

M50-54

9684

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13842

Males

9331

M50-54

9331

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

14637

Males

9639

M50-54

9639

23M→24M

23.0 - 24.0 mi

Top 48%
×6story building
+12ft-82ft

Overall

12899

Males

8791

M50-54

8791

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11375

Males

8009

M50-54

8009

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12374

Males

8437

M50-54

8437

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11128

Males

7852

M50-54

7852

Passing Analysis

Category:
Athletes Passed
1667
Passed By
2508
Net Change
-843
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9752
5K → 10K85956+803#9752#8949
10K → 15K183104+79#8949#8870
15K → 20K16776+91#8870#8779
20K → Half1443-29#8779#8808
Half → 25K64199-135#8808#8943
25K → 30K64587-523#8943#9466
30K → 20M25337-312#9466#9778
20M → 21M28315-289#9778#10067
21M → 35K20164-144#10067#10211
35K → 23M41291-250#10211#10461
23M → 24M37153-116#10461#10577
24M → 40K6468-4#10577#10581
40K → 25.2M2448-24#10581#10605
25.2M → Finish7767+10#10605#10595
TOTALS16672508-843
📊

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