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BOSTON MARATHON 2023

Frederic Loos

Bib: 27532•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
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
9:26/mi
29:17
↑ 97↓ 3451.5%
10K· 6.21 mi
9:22/mi
58:22
↑ 79↓ 1380.4%
15K· 9.32 mi
9:49/mi
1:28:52
↑ 67↓ 78
20K· 12.43 mi
10:01/mi
2:00:00
↑ 106↓ 860.1%
Half· 13.11 mi
10:02/mi
2:06:51
↑ 19↓ 370.5%
25K· 15.53 mi
10:34/mi
2:32:27
↑ 66↓ 880.2%
30K· 18.64 mi
11:15/mi
3:07:25
↑ 181↓ 1480.2%
20M
12:14/mi
3:24:03
↑ 64↓ 500.2%
21M
13:30/mi
3:37:33
↑ 106↓ 241.6%
35K· 21.75 mi
11:08/mi
3:45:53
↑ 17↓ 861.7%
23M
12:22/mi
4:01:22
↑ 23↓ 630.6%
24M
10:46/mi
4:12:08
↓ 821.3%
40K· 24.85 mi
11:04/mi
4:21:36
↓ 200.3%
25.2M
15:48/mi
4:27:03
↑ 13↓ 160.2%
Finish· 26.22 mi
10:52/mi
4:38:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:51
Pace9:41 /mi
2nd Half
Distance13.11 mi
Time2:31:16
Pace11:32 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2429:179:2629:17
9:26
-
10K
6.21 mi11:48:2958:229:2429:05
9:22
-0:04
15K
9.32 mi12:18:591:28:529:3230:30
9:49
+0:27
20K
12.43 mi12:50:072:00:009:3931:08
10:01
+0:12
Half
13.11 mi12:56:582:06:519:416:51
10:02
+0:01
25K
15.53 mi13:22:342:32:279:4925:36
10:34
+0:32
30K
18.64 mi13:57:323:07:2510:0334:58
11:15
+0:41
20M
20.00 mi14:14:103:24:0310:1216:38
12:14
+0:59
21M
21.00 mi14:27:403:37:3310:2213:30
13:30
+1:16
35K
21.75 mi14:36:003:45:5310:238:20
11:08
-2:22
23M
23.00 mi14:51:294:01:2210:3015:29
12:22
+1:14
24M
24.00 mi15:02:154:12:0810:3010:46
10:46
-1:36
40K
24.85 mi15:11:434:21:3610:329:28
11:04
+0:18
25.2M
25.20 mi15:17:104:27:0310:365:27
15:48
+4:44
Finish
26.22 mi15:28:144:38:0710:3711:04
10:52
-4:56

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

9:22 /mi

Average Pace

10:37 /mi

Slowest Pace

15:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:51

46% of race

Time at Steady Pace

1:40:12

36% of race

Time at Slower Pace

51:04

18% of race

Average Pace: 10:36 /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 mi11:19:2429:179:2629:17
9:26
#21872
10K
6.21 mi11:48:2958:229:2429:05
9:22
#22033
15K
9.32 mi12:18:591:28:529:3230:30
9:49
#22412
20K
12.43 mi12:50:072:00:009:3931:08
10:01
#22571
Half
13.11 mi12:56:582:06:519:416:51
10:02
#22620
25K
15.53 mi13:22:342:32:279:4925:36
10:34
#22756
30K
18.64 mi13:57:323:07:2510:0334:58
11:15
#22917
20M
20.00 mi14:14:103:24:0310:1216:38
12:14
#23092
21M
21.00 mi14:27:403:37:3310:2213:30
13:30
#23222
35K
21.75 mi14:36:003:45:5310:238:20
11:08
#23217
23M
23.00 mi14:51:294:01:2210:3015:29
12:22
#23330
24M
24.00 mi15:02:154:12:0810:3010:46
10:46
#23303
40K
24.85 mi15:11:434:21:3610:329:28
11:04
#23278
25.2M
25.20 mi15:17:104:27:0310:365:27
15:48
#23368
Finish
26.22 mi15:28:144:38:0710:3711:04
10:52
#23380
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi21872130271302723103(Top 87%)13678(Top 90%)13678(Top 962%)
10K6.21 mi3.10 mi22033-16113139-11213139-11222115(Top 83%)13209(Top 87%)13209(Top 929%)
15K9.32 mi3.11 mi22412-37913342-20313342-20323103(Top 87%)13678(Top 90%)13678(Top 962%)
20K12.43 mi3.11 mi22571-15913424-8213424-8222969(Top 86%)13608(Top 90%)13608(Top 957%)
Half13.11 mi0.68 mi22620-4913448-2413448-2423391(Top 88%)13796(Top 91%)13796(Top 970%)
25K15.53 mi2.42 mi22756-13613501-5313501-5323292(Top 87%)13718(Top 90%)13718(Top 965%)
30K18.64 mi3.11 mi22917-16113558-5713558-5723511(Top 88%)13750(Top 91%)13750(Top 967%)
20M20.00 mi1.36 mi23092-17513625-6713625-6724486(Top 92%)14133(Top 93%)14133(Top 994%)
21M21.00 mi1.00 mi23222-13013681-5613681-5624596(Top 92%)14176(Top 93%)14176(Top 997%)
35K21.75 mi0.75 mi23217+513671+1013671+1023572(Top 89%)13628(Top 90%)13628(Top 958%)
23M23.00 mi1.25 mi23330-11313713-4213713-4224459(Top 92%)14068(Top 93%)14068(Top 989%)
24M24.00 mi1.00 mi23303+2713700+1313700+1322625(Top 85%)13165(Top 87%)13165(Top 926%)
40K24.85 mi0.85 mi23278+2513675+2513675+2522520(Top 85%)13088(Top 86%)13088(Top 920%)
25.2M25.20 mi0.35 mi23368-9013707-3213707-3226063(Top 98%)14844(Top 98%)14844(Top 1044%)
Finish26.22 mi1.02 mi23380-12137071370723727(Top 89%)13683(Top 90%)13683(Top 962%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

23103

Males

13678

M55-59

13678

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

22115

Males

13209

M55-59

13209

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

23103

Males

13678

M55-59

13678

15K→20K

9.3 - 12.4 mi

Top 86%
×5story building
+106ft-86ft

Overall

22969

Males

13608

M55-59

13608

20K→Half

12.4 - 13.1 mi

Top 88%
×2story building
+19ft-37ft

Overall

23391

Males

13796

M55-59

13796

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23292

Males

13718

M55-59

13718

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23511

Males

13750

M55-59

13750

30K→20M

18.6 - 20.0 mi

Top 92%
×5story building
+64ft-50ft

Overall

24486

Males

14133

M55-59

14133

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

24596

Males

14176

M55-59

14176

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

23572

Males

13628

M55-59

13628

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24459

Males

14068

M55-59

14068

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

22625

Males

13165

M55-59

13165

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22520

Males

13088

M55-59

13088

40K→25.2M

24.9 - 25.2 mi

Top 98%
×1story
+13ft-16ft

Overall

26063

Males

14844

M55-59

14844

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23727

Males

13683

M55-59

13683

Passing Analysis

Category:
Athletes Passed
684
Passed By
2192
Net Change
-1508
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21872
5K → 10K175336-161#21872#22033
10K → 15K65444-379#22033#22412
15K → 20K83242-159#22412#22571
20K → Half1665-49#22571#22620
Half → 25K60196-136#22620#22756
25K → 30K63224-161#22756#22917
30K → 20M28203-175#22917#23092
20M → 21M13143-130#23092#23222
21M → 35K3328+5#23222#23217
35K → 23M18131-113#23217#23330
23M → 24M4619+27#23330#23303
24M → 40K5025+25#23303#23278
40K → 25.2M393-90#23278#23368
25.2M → Finish3143-12#23368#23380
TOTALS6842192-1508
📊

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