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BOSTON MARATHON 2023

Michael Baso Contreras

Bib: 31658•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
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
9:30/mi
29:30
↑ 97↓ 3451.5%
10K· 6.21 mi
9:24/mi
58:44
↑ 79↓ 1380.4%
15K· 9.32 mi
9:24/mi
1:27:57
↑ 67↓ 78
20K· 12.43 mi
9:46/mi
1:58:19
↑ 106↓ 860.1%
Half· 13.11 mi
9:49/mi
2:05:01
↑ 19↓ 370.5%
25K· 15.53 mi
10:05/mi
2:29:29
↑ 66↓ 880.2%
30K· 18.64 mi
10:14/mi
3:01:16
↑ 181↓ 1480.2%
20M
9:55/mi
3:14:45
↑ 64↓ 500.2%
21M
10:21/mi
3:25:06
↑ 106↓ 241.6%
35K· 21.75 mi
9:29/mi
3:32:12
↑ 17↓ 861.7%
23M
9:37/mi
3:44:15
↑ 23↓ 630.6%
24M
9:18/mi
3:53:33
↓ 821.3%
40K· 24.85 mi
9:38/mi
4:01:47
↓ 200.3%
25.2M
10:38/mi
4:05:27
↑ 13↓ 160.2%
Finish· 26.22 mi
9:24/mi
4:15:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:01
Pace9:32 /mi
2nd Half
Distance13.11 mi
Time2:10:01
Pace9:55 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0729:309:3029:30
9:30
-
10K
6.21 mi12:21:2158:449:2729:14
9:24
-0:06
15K
9.32 mi12:50:341:27:579:2629:14
9:24
0:00
20K
12.43 mi13:20:561:58:199:3130:22
9:46
+0:22
Half
13.11 mi13:27:382:05:019:326:42
9:49
+0:03
25K
15.53 mi13:52:062:29:299:3724:28
10:05
+0:16
30K
18.64 mi14:23:533:01:169:4331:47
10:14
+0:09
20M
20.00 mi14:37:223:14:459:4413:29
9:55
-0:19
21M
21.00 mi14:47:433:25:069:4610:21
10:21
+0:26
35K
21.75 mi14:54:493:32:129:457:06
9:29
-0:52
23M
23.00 mi15:06:523:44:159:4512:03
9:37
+0:08
24M
24.00 mi15:16:103:53:339:449:18
9:18
-0:19
40K
24.85 mi15:24:244:01:479:448:14
9:38
+0:20
25.2M
25.20 mi15:28:044:05:279:443:40
10:38
+1:00
Finish
26.22 mi15:37:394:15:029:449:35
9:24
-1:14

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

9:18 /mi

Average Pace

9:44 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:29:14

82% of race

Time at Steady Pace

45:48

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:44 /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 mi11:52:0729:309:3029:30
9:30
#22078
10K
6.21 mi12:21:2158:449:2729:14
9:24
#22204
15K
9.32 mi12:50:341:27:579:2629:14
9:24
#22101
20K
12.43 mi13:20:561:58:199:3130:22
9:46
#22180
Half
13.11 mi13:27:382:05:019:326:42
9:49
#22211
25K
15.53 mi13:52:062:29:299:3724:28
10:05
#22265
30K
18.64 mi14:23:533:01:169:4331:47
10:14
#22138
20M
20.00 mi14:37:223:14:459:4413:29
9:55
#21983
21M
21.00 mi14:47:433:25:069:4610:21
10:21
#21838
35K
21.75 mi14:54:493:32:129:457:06
9:29
#21778
23M
23.00 mi15:06:523:44:159:4512:03
9:37
#21603
24M
24.00 mi15:16:103:53:339:449:18
9:18
#21482
40K
24.85 mi15:24:244:01:479:448:14
9:38
#21369
25.2M
25.20 mi15:28:044:05:279:443:40
10:38
#21322
Finish
26.22 mi15:37:394:15:029:449:35
9:24
#21262
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi22078131421314221975(Top 83%)13177(Top 87%)13177(Top 585%)
10K6.21 mi3.10 mi22204-12613226-8413226-8422231(Top 84%)13268(Top 87%)13268(Top 589%)
15K9.32 mi3.11 mi22101+10313187+3913187+3921975(Top 83%)13177(Top 87%)13177(Top 585%)
20K12.43 mi3.11 mi22180-7913232-4513232-4522336(Top 84%)13328(Top 88%)13328(Top 592%)
Half13.11 mi0.68 mi22211-3113245-1313245-1322895(Top 86%)13570(Top 89%)13570(Top 603%)
25K15.53 mi2.42 mi22265-5413261-1613261-1622412(Top 84%)13324(Top 88%)13324(Top 592%)
30K18.64 mi3.11 mi22138+12713202+5913202+5921593(Top 81%)12894(Top 85%)12894(Top 573%)
20M20.00 mi1.36 mi21983+15513125+7713125+7720242(Top 76%)12223(Top 81%)12223(Top 543%)
21M21.00 mi1.00 mi21838+14513056+6913056+6919147(Top 72%)11697(Top 77%)11697(Top 519%)
35K21.75 mi0.75 mi21778+6013016+4013016+4019820(Top 74%)11980(Top 79%)11980(Top 532%)
23M23.00 mi1.25 mi21603+17512922+9412922+9418824(Top 71%)11503(Top 76%)11503(Top 511%)
24M24.00 mi1.00 mi21482+12112858+6412858+6418454(Top 69%)11300(Top 74%)11300(Top 502%)
40K24.85 mi0.85 mi21369+11312794+6412794+6418799(Top 71%)11401(Top 75%)11401(Top 506%)
25.2M25.20 mi0.35 mi21322+4712768+2612768+2619490(Top 73%)11698(Top 77%)11698(Top 519%)
Finish26.22 mi1.02 mi21262+6012736+3212736+3219777(Top 74%)11882(Top 78%)11882(Top 528%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

21975

Males

13177

M45-49

13177

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22231

Males

13268

M45-49

13268

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

21975

Males

13177

M45-49

13177

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

22336

Males

13328

M45-49

13328

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

22895

Males

13570

M45-49

13570

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22412

Males

13324

M45-49

13324

25K→30K

15.5 - 18.6 mi

Top 81%
×9story building
+181ft-148ft

Overall

21593

Males

12894

M45-49

12894

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

20242

Males

12223

M45-49

12223

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

19147

Males

11697

M45-49

11697

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19820

Males

11980

M45-49

11980

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

18824

Males

11503

M45-49

11503

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

18454

Males

11300

M45-49

11300

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18799

Males

11401

M45-49

11401

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

19490

Males

11698

M45-49

11698

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

19777

Males

11882

M45-49

11882

Passing Analysis

Category:
Athletes Passed
1722
Passed By
906
Net Change
+816
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22078
5K → 10K190316-126#22078#22204
10K → 15K221118+103#22204#22101
15K → 20K106185-79#22101#22180
20K → Half1344-31#22180#22211
Half → 25K82136-54#22211#22265
25K → 30K18861+127#22265#22138
30K → 20M1627+155#22138#21983
20M → 21M1527+145#21983#21838
21M → 35K666+60#21838#21778
35K → 23M1772+175#21778#21603
23M → 24M1221+121#21603#21482
24M → 40K12411+113#21482#21369
40K → 25.2M492+47#21369#21322
25.2M → Finish7010+60#21322#21262
TOTALS1722906+816
📊

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