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BOSTON MARATHON 2023

Sam Felsenfeld

Bib: 12805•M

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 46%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
7:43/mi
23:59
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
47:59
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:12:56
↑ 67↓ 78
20K· 12.43 mi
8:01/mi
1:37:49
↑ 106↓ 860.1%
Half· 13.11 mi
8:04/mi
1:43:19
↑ 19↓ 370.5%
25K· 15.53 mi
8:10/mi
2:03:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:28:48
↑ 181↓ 1480.2%
20M
8:15/mi
2:40:00
↑ 64↓ 500.2%
21M
8:36/mi
2:48:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:54:29
↑ 17↓ 861.7%
23M
8:09/mi
3:04:41
↑ 23↓ 630.6%
24M
7:52/mi
3:12:33
↓ 821.3%
40K· 24.85 mi
8:07/mi
3:19:29
↓ 200.3%
25.2M
8:33/mi
3:22:26
↑ 13↓ 160.2%
Finish· 26.22 mi
7:17/mi
3:29:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:19
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:46:32
Pace8:08 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:39:4623:597:4323:59
7:43
-
10K
6.21 mi12:03:4647:597:4324:00
7:43
0:00
15K
9.32 mi12:28:431:12:567:4924:57
8:02
+0:19
20K
12.43 mi12:53:361:37:497:5224:53
8:01
-0:01
Half
13.11 mi12:59:061:43:197:535:30
8:04
+0:03
25K
15.53 mi13:18:532:03:067:5519:47
8:10
+0:06
30K
18.64 mi13:44:352:28:487:5925:42
8:16
+0:06
20M
20.00 mi13:55:472:40:008:0011:12
8:15
-0:01
21M
21.00 mi14:04:232:48:368:028:36
8:36
+0:21
35K
21.75 mi14:10:162:54:298:015:53
7:52
-0:44
23M
23.00 mi14:20:283:04:418:0210:12
8:09
+0:17
24M
24.00 mi14:28:203:12:338:017:52
7:52
-0:17
40K
24.85 mi14:35:163:19:298:026:56
8:07
+0:15
25.2M
25.20 mi14:38:133:22:268:022:57
8:33
+0:26
Finish
26.22 mi14:45:383:29:518:017:25
7:17
-1:16

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

7:17 /mi

Average Pace

8:01 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:09:09

33% of race

Time at Steady Pace

2:12:06

63% of race

Time at Slower Pace

8:36

4% of race

Average Pace: 8:00 /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 mi11:39:4623:597:4323:59
7:43
#11615
10K
6.21 mi12:03:4647:597:4324:00
7:43
#12020
15K
9.32 mi12:28:431:12:567:4924:57
8:02
#12919
20K
12.43 mi12:53:361:37:497:5224:53
8:01
#13046
Half
13.11 mi12:59:061:43:197:535:30
8:04
#13139
25K
15.53 mi13:18:532:03:067:5519:47
8:10
#13271
30K
18.64 mi13:44:352:28:487:5925:42
8:16
#13149
20M
20.00 mi13:55:472:40:008:0011:12
8:15
#13053
21M
21.00 mi14:04:232:48:368:028:36
8:36
#12887
35K
21.75 mi14:10:162:54:298:015:53
7:52
#12805
23M
23.00 mi14:20:283:04:418:0210:12
8:09
#12678
24M
24.00 mi14:28:203:12:338:017:52
7:52
#12554
40K
24.85 mi14:35:163:19:298:026:56
8:07
#12488
25.2M
25.20 mi14:38:133:22:268:022:57
8:33
#12442
Finish
26.22 mi14:45:383:29:518:017:25
7:17
#12208
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi116158949894914623(Top 55%)10142(Top 67%)10142(Top 450%)
10K6.21 mi3.10 mi12020-4059124-1759124-17512460(Top 47%)9320(Top 61%)9320(Top 414%)
15K9.32 mi3.11 mi12919-8999491-3679491-36714623(Top 55%)10142(Top 67%)10142(Top 450%)
20K12.43 mi3.11 mi13046-1279518-279518-2713494(Top 51%)9658(Top 64%)9658(Top 429%)
Half13.11 mi0.68 mi13139-939559-419559-4114771(Top 55%)10188(Top 67%)10188(Top 452%)
25K15.53 mi2.42 mi13271-1329591-329591-3213922(Top 52%)9732(Top 64%)9732(Top 432%)
30K18.64 mi3.11 mi13149+1229495+969495+9612836(Top 48%)9161(Top 60%)9161(Top 407%)
20M20.00 mi1.36 mi13053+969438+579438+5711948(Top 45%)8688(Top 57%)8688(Top 386%)
21M21.00 mi1.00 mi12887+1669348+909348+9011049(Top 42%)8143(Top 54%)8143(Top 362%)
35K21.75 mi0.75 mi12805+829298+509298+5011099(Top 42%)8168(Top 54%)8168(Top 363%)
23M23.00 mi1.25 mi12678+1279225+739225+7310793(Top 41%)7870(Top 52%)7870(Top 349%)
24M24.00 mi1.00 mi12554+1249153+729153+7210272(Top 39%)7545(Top 50%)7545(Top 335%)
40K24.85 mi0.85 mi12488+669103+509103+5010753(Top 40%)7729(Top 51%)7729(Top 343%)
25.2M25.20 mi0.35 mi12442+469075+289075+289851(Top 37%)7237(Top 48%)7237(Top 321%)
Finish26.22 mi1.02 mi12208+2348953+1228953+1226978(Top 26%)5561(Top 37%)5561(Top 247%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14623

Males

10142

M45-49

10142

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12460

Males

9320

M45-49

9320

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14623

Males

10142

M45-49

10142

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13494

Males

9658

M45-49

9658

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14771

Males

10188

M45-49

10188

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

13922

Males

9732

M45-49

9732

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12836

Males

9161

M45-49

9161

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

11948

Males

8688

M45-49

8688

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11049

Males

8143

M45-49

8143

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11099

Males

8168

M45-49

8168

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

10793

Males

7870

M45-49

7870

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

10272

Males

7545

M45-49

7545

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10753

Males

7729

M45-49

7729

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9851

Males

7237

M45-49

7237

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

6978

Males

5561

M45-49

5561

Passing Analysis

Category:
Athletes Passed
1797
Passed By
2390
Net Change
-593
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11615
5K → 10K154559-405#11615#12020
10K → 15K28927-899#12020#12919
15K → 20K144271-127#12919#13046
20K → Half11104-93#13046#13139
Half → 25K109241-132#13139#13271
25K → 30K243121+122#13271#13149
30K → 20M13741+96#13149#13053
20M → 21M18923+166#13053#12887
21M → 35K10018+82#12887#12805
35K → 23M14922+127#12805#12678
23M → 24M14420+124#12678#12554
24M → 40K9226+66#12554#12488
40K → 25.2M5610+46#12488#12442
25.2M → Finish2417+234#12442#12208
TOTALS17972390-593
📊

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