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BOSTON MARATHON 2023

Rex Radloff

Bib: 4242•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:54
Rank: #342
Start → 5K
17:54 | 5:46/mi
10K· 6.21 mi
35:30
Rank: #315 (+27)
5K → 10K
17:36 | 5:40/mi
15K· 9.32 mi
53:19
Rank: #312 (+3)
10K → 15K
17:49 | 5:44/mi
20K· 12.43 mi
1:11:24
Rank: #312
15K → 20K
18:05 | 5:49/mi
Half· 13.11 mi
1:15:21
Rank: #311 (+1)
20K → Half
3:57 | 5:47/mi
25K· 15.53 mi
1:29:28
Rank: #302 (+9)
Half → 25K
14:07 | 5:49/mi
30K· 18.64 mi
1:47:51
Rank: #294 (+8)
25K → 30K
18:23 | 5:55/mi
20M
1:56:05
Rank: #302 (-8)
30K → 20M
8:14 | 6:04/mi
21M
2:02:29
Rank: #299 (+3)
20M → 21M
6:24 | 6:24/mi
35K· 21.75 mi
2:07:03
Rank: #307 (-8)
21M → 35K
4:34 | 6:06/mi
23M
2:14:52
Rank: #306 (+1)
35K → 23M
7:49 | 6:15/mi
24M
2:21:03
Rank: #317 (-11)
23M → 24M
6:11 | 6:11/mi
40K· 24.85 mi
2:26:18
Rank: #315 (+2)
24M → 40K
5:15 | 6:08/mi
25.2M
2:28:32
Rank: #314 (+1)
40K → 25.2M
2:14 | 6:29/mi
Finish· 26.22 mi
2:34:23
Rank: #300 (+14)
25.2M → Finish
5:51 | 5:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:21
Pace5:45 /mi
2nd Half
Distance13.11 mi
Time1:19:02
Pace6:02 /mi
📊Positive Split: 4.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:2817:545:4617:54
5:46
-
10K
6.21 mi10:36:0435:305:4317:36
5:40
-0:06
15K
9.32 mi10:53:5353:195:4317:49
5:44
+0:04
20K
12.43 mi11:11:581:11:245:4518:05
5:49
+0:05
Half
13.11 mi11:15:551:15:215:453:57
5:47
-0:02
25K
15.53 mi11:30:021:29:285:4614:07
5:49
+0:02
30K
18.64 mi11:48:251:47:515:4718:23
5:55
+0:06
20M
20.00 mi11:56:391:56:055:488:14
6:04
+0:09
21M
21.00 mi12:03:032:02:295:506:24
6:24
+0:20
35K
21.75 mi12:07:372:07:035:514:34
6:06
-0:18
23M
23.00 mi12:15:262:14:525:527:49
6:15
+0:09
24M
24.00 mi12:21:372:21:035:536:11
6:11
-0:04
40K
24.85 mi12:26:522:26:185:535:15
6:08
-0:03
25.2M
25.20 mi12:29:062:28:325:542:14
6:29
+0:21
Finish
26.22 mi12:34:572:34:235:545:51
5:44
-0:45

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

5:40 /mi

Average Pace

5:54 /mi

Slowest Pace

6:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:17:56

89% of race

Time at Steady Pace

16:27

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:53 /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 mi10:18:2817:545:4617:54
5:46
#342
10K
6.21 mi10:36:0435:305:4317:36
5:40
#315
15K
9.32 mi10:53:5353:195:4317:49
5:44
#312
20K
12.43 mi11:11:581:11:245:4518:05
5:49
#312
Half
13.11 mi11:15:551:15:215:453:57
5:47
#311
25K
15.53 mi11:30:021:29:285:4614:07
5:49
#302
30K
18.64 mi11:48:251:47:515:4718:23
5:55
#294
20M
20.00 mi11:56:391:56:055:488:14
6:04
#302
21M
21.00 mi12:03:032:02:295:506:24
6:24
#299
35K
21.75 mi12:07:372:07:035:514:34
6:06
#307
23M
23.00 mi12:15:262:14:525:527:49
6:15
#306
24M
24.00 mi12:21:372:21:035:536:11
6:11
#317
40K
24.85 mi12:26:522:26:185:535:15
6:08
#315
25.2M
25.20 mi12:29:062:28:325:542:14
6:29
#314
Finish
26.22 mi12:34:572:34:235:545:51
5:44
#300
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi342312312292(Top 1%)260(Top 2%)260(Top 5%)
10K6.21 mi3.10 mi315+27285+27285+27265(Top 1.0%)235(Top 2%)235(Top 4%)
15K9.32 mi3.11 mi312+3281+4281+4292(Top 1%)260(Top 2%)260(Top 5%)
20K12.43 mi3.11 mi312280+1280+1330(Top 1%)298(Top 2%)298(Top 6%)
Half13.11 mi0.68 mi311+1279+1279+1373(Top 1%)344(Top 2%)344(Top 7%)
25K15.53 mi2.42 mi302+9270+9270+9304(Top 1%)276(Top 2%)276(Top 5%)
30K18.64 mi3.11 mi294+8262+8262+8280(Top 1%)256(Top 2%)256(Top 5%)
20M20.00 mi1.36 mi302-8271-9271-9418(Top 2%)384(Top 3%)384(Top 7%)
21M21.00 mi1.00 mi299+3268+3268+3475(Top 2%)441(Top 3%)441(Top 8%)
35K21.75 mi0.75 mi307-8276-8276-8909(Top 3%)861(Top 6%)861(Top 16%)
23M23.00 mi1.25 mi306+1275+1275+1688(Top 3%)648(Top 4%)648(Top 12%)
24M24.00 mi1.00 mi317-11286-11286-11940(Top 4%)889(Top 6%)889(Top 17%)
40K24.85 mi0.85 mi315+2285+1285+1543(Top 2%)512(Top 3%)512(Top 10%)
25.2M25.20 mi0.35 mi314+1284+1284+1449(Top 2%)423(Top 3%)423(Top 8%)
Finish26.22 mi1.02 mi300+14272+12272+12284(Top 1%)266(Top 2%)266(Top 5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

292

Males

260

M18-39

260

5K→10K

3.1 - 6.2 mi

Top 1.0%
×5stories
+79ft-138ft

Overall

265

Males

235

M18-39

235

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

292

Males

260

M18-39

260

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

330

Males

298

M18-39

298

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

373

Males

344

M18-39

344

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

304

Males

276

M18-39

276

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

280

Males

256

M18-39

256

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

418

Males

384

M18-39

384

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

475

Males

441

M18-39

441

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

909

Males

861

M18-39

861

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

688

Males

648

M18-39

648

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

940

Males

889

M18-39

889

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

543

Males

512

M18-39

512

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

449

Males

423

M18-39

423

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

284

Males

266

M18-39

266

Passing Analysis

Category:
Athletes Passed
125
Passed By
83
Net Change
+42
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#342
5K → 10K347+27#342#315
10K → 15K129+3#315#312
15K → 20K660#312#312
20K → Half10+1#312#311
Half → 25K123+9#311#302
25K → 30K135+8#302#294
30K → 20M311-8#294#302
20M → 21M74+3#302#299
21M → 35K08-8#299#307
35K → 23M54+1#307#306
23M → 24M516-11#306#317
24M → 40K86+2#317#315
40K → 25.2M54+1#315#314
25.2M → Finish140+14#314#300
TOTALS12583+42
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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