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BOSTON MARATHON 2023

Giancarlo Loeffler

Bib: 5794•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 25%
Gender (Male)
#0 / 15176
Top 38%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:03
Rank: #4438
Start → 5K
6:47/mi
21:03 split
10K· 6.21 mi
41:56
Rank: #4468 (-30)
5K → 10K
6:43/mi
20:53 split
15K· 9.32 mi
1:02:55
Rank: #4518 (-50)
10K → 15K
6:45/mi
20:59 split
20K· 12.43 mi
1:24:07
Rank: #4545 (-27)
15K → 20K
6:49/mi
21:12 split
Half· 13.11 mi
1:28:40
Rank: #4499 (+46)
20K → Half
6:40/mi
4:33 split
25K· 15.53 mi
1:45:07
Rank: #4379 (+120)
Half → 25K
6:47/mi
16:27 split
30K· 18.64 mi
2:09:43
Rank: #5579 (-1200)
25K → 30K
7:55/mi
24:36 split
20M
2:20:20
Rank: #5747 (-168)
30K → 20M
7:49/mi
10:37 split
21M
2:29:21
Rank: #6074 (-327)
20M → 21M
9:01/mi
9:01 split
35K· 21.75 mi
2:35:14
Rank: #6194 (-120)
21M → 35K
7:52/mi
5:53 split
23M
2:45:00
Rank: #6238 (-44)
35K → 23M
7:48/mi
9:46 split
24M
2:52:39
Rank: #6279 (-41)
23M → 24M
7:39/mi
7:39 split
40K· 24.85 mi
2:59:54
Rank: #6465 (-186)
24M → 40K
8:29/mi
7:15 split
25.2M
3:02:48
Rank: #6468 (-3)
40K → 25.2M
8:25/mi
2:54 split
Finish· 26.22 mi
3:10:30
Rank: #6526 (-58)
25.2M → Finish
7:33/mi
7:42 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:40
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:41:50
Pace7:46 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5521:036:4721:03
6:47
-
10K
6.21 mi10:45:4841:566:4520:53
6:43
-0:04
15K
9.32 mi11:06:471:02:556:4520:59
6:45
+0:02
20K
12.43 mi11:27:591:24:076:4621:12
6:49
+0:04
Half
13.11 mi11:32:321:28:406:464:33
6:40
-0:09
25K
15.53 mi11:48:591:45:076:4616:27
6:47
+0:07
30K
18.64 mi12:13:352:09:436:5824:36
7:55
+1:08
20M
20.00 mi12:24:122:20:207:0110:37
7:49
-0:06
21M
21.00 mi12:33:132:29:217:079:01
9:01
+1:12
35K
21.75 mi12:39:062:35:147:085:53
7:52
-1:09
23M
23.00 mi12:48:522:45:007:109:46
7:48
-0:04
24M
24.00 mi12:56:312:52:397:127:39
7:39
-0:09
40K
24.85 mi13:03:462:59:547:147:15
8:29
+0:50
25.2M
25.20 mi13:06:403:02:487:152:54
8:25
-0:04
Finish
26.22 mi13:14:223:10:307:167:42
7:33
-0:52

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

6:40 /mi

Average Pace

7:16 /mi

Slowest Pace

9:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:07

55% of race

Time at Steady Pace

1:06:13

35% of race

Time at Slower Pace

19:10

10% of race

Average Pace: 7:16 /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 mi10:24:5521:036:4721:03
6:47
#4438
10K
6.21 mi10:45:4841:566:4520:53
6:43
#4468
15K
9.32 mi11:06:471:02:556:4520:59
6:45
#4518
20K
12.43 mi11:27:591:24:076:4621:12
6:49
#4545
Half
13.11 mi11:32:321:28:406:464:33
6:40
#4499
25K
15.53 mi11:48:591:45:076:4616:27
6:47
#4379
30K
18.64 mi12:13:352:09:436:5824:36
7:55
#5579
20M
20.00 mi12:24:122:20:207:0110:37
7:49
#5747
21M
21.00 mi12:33:132:29:217:079:01
9:01
#6074
35K
21.75 mi12:39:062:35:147:085:53
7:52
#6194
23M
23.00 mi12:48:522:45:007:109:46
7:48
#6238
24M
24.00 mi12:56:312:52:397:127:39
7:39
#6279
40K
24.85 mi13:03:462:59:547:147:15
8:29
#6465
25.2M
25.20 mi13:06:403:02:487:152:54
8:25
#6468
Finish
26.22 mi13:14:223:10:307:167:42
7:33
#6526
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4438414641464668(Top 18%)4361(Top 29%)4361(Top 83%)
10K6.21 mi3.10 mi4468-304179-334179-334576(Top 17%)4273(Top 28%)4273(Top 81%)
15K9.32 mi3.11 mi4518-504222-434222-434668(Top 18%)4361(Top 29%)4361(Top 83%)
20K12.43 mi3.11 mi4545-274245-234245-234676(Top 18%)4354(Top 29%)4354(Top 82%)
Half13.11 mi0.68 mi4499+464207+384207+384124(Top 15%)3876(Top 26%)3876(Top 73%)
25K15.53 mi2.42 mi4379+1204097+1104097+1104033(Top 15%)3784(Top 25%)3784(Top 72%)
30K18.64 mi3.11 mi5579-12005128-10315128-103110250(Top 39%)7953(Top 52%)7953(Top 150%)
20M20.00 mi1.36 mi5747-1685258-1305258-1308917(Top 33%)7131(Top 47%)7131(Top 135%)
21M21.00 mi1.00 mi6074-3275498-2405498-24013462(Top 51%)9240(Top 61%)9240(Top 175%)
35K21.75 mi0.75 mi6194-1205585-875585-8711047(Top 41%)8116(Top 53%)8116(Top 154%)
23M23.00 mi1.25 mi6238-445605-205605-208386(Top 32%)6628(Top 44%)6628(Top 125%)
24M24.00 mi1.00 mi6279-415624-195624-198702(Top 33%)6720(Top 44%)6720(Top 127%)
40K24.85 mi0.85 mi6465-1865746-1225746-12213148(Top 49%)8833(Top 58%)8833(Top 167%)
25.2M25.20 mi0.35 mi6468-35741+55741+58864(Top 33%)6637(Top 44%)6637(Top 126%)
Finish26.22 mi1.02 mi6526-585766-255766-258920(Top 34%)6698(Top 44%)6698(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

4668

Males

4361

M18-39

4361

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4576

Males

4273

M18-39

4273

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

4668

Males

4361

M18-39

4361

15K→20K

9.3 - 12.4 mi

Top 18%
×5story building
+106ft-86ft

Overall

4676

Males

4354

M18-39

4354

20K→Half

12.4 - 13.1 mi

Top 15%
×2story building
+19ft-37ft

Overall

4124

Males

3876

M18-39

3876

Half→25K

13.1 - 15.5 mi

Top 15%
×4story building
+66ft-88ft

Overall

4033

Males

3784

M18-39

3784

25K→30K

15.5 - 18.6 mi

Top 39%
×9story building
+181ft-148ft

Overall

10250

Males

7953

M18-39

7953

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

8917

Males

7131

M18-39

7131

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

13462

Males

9240

M18-39

9240

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11047

Males

8116

M18-39

8116

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

8386

Males

6628

M18-39

6628

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8702

Males

6720

M18-39

6720

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13148

Males

8833

M18-39

8833

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8864

Males

6637

M18-39

6637

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

8920

Males

6698

M18-39

6698

Passing Analysis

Category:
Athletes Passed
804
Passed By
2892
Net Change
-2088
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4438
5K → 10K200230-30#4438#4468
10K → 15K99149-50#4468#4518
15K → 20K92119-27#4518#4545
20K → Half537+46#4545#4499
Half → 25K14525+120#4499#4379
25K → 30K81208-1200#4379#5579
30K → 20M20188-168#5579#5747
20M → 21M9336-327#5747#6074
21M → 35K7127-120#6074#6194
35K → 23M5397-44#6194#6238
23M → 24M4889-41#6238#6279
24M → 40K12198-186#6279#6465
40K → 25.2M2730-3#6465#6468
25.2M → Finish3189-58#6468#6526
TOTALS8042892-2088
📊

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