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BOSTON MARATHON 2023

Thomas Lax

NC

Bib: 18479 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Top 39%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:47/mi
24:12
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:41/mi
48:04
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:41/mi
1:11:56
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:50/mi
1:36:15
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:46/mi
1:41:33
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:57/mi
2:00:50
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:16/mi
2:26:30
↑ 181↓ 1480.2%
138 ft elev
20M
9:12/mi
2:39:00
↑ 64↓ 500.2%
148 ft elev
21M
9:14/mi
2:48:14
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:03/mi
2:54:15
↑ 17↓ 861.7%
156 ft elev
23M
8:14/mi
3:04:34
↑ 23↓ 630.6%
116 ft elev
24M
8:05/mi
3:12:39
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:17/mi
3:19:44
↓ 200.3%
20 ft elev
25.2M
9:11/mi
3:22:54
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:13/mi
3:31:16
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:33
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:49:43
Pace8:22 /mi
📊Positive Split: 8.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2624:127:4724:12
7:47
-
10K
6.21 mi11:39:1848:047:4423:52
7:41
-0:06
15K
9.32 mi12:03:101:11:567:4323:52
7:41
0:00
20K
12.43 mi12:27:291:36:157:4524:19
7:50
+0:09
Half
13.11 mi12:32:471:41:337:455:18
7:46
-0:04
25K
15.53 mi12:52:042:00:507:4719:17
7:57
+0:11
30K
18.64 mi13:17:442:26:307:5225:40
8:16
+0:19
20M
20.00 mi13:30:142:39:007:5712:30
9:12
+0:56
21M
21.00 mi13:39:282:48:148:019:14
9:14
+0:02
35K
21.75 mi13:45:292:54:158:016:01
8:03
-1:11
23M
23.00 mi13:55:483:04:348:0110:19
8:14
+0:11
24M
24.00 mi14:03:533:12:398:028:05
8:05
-0:09
40K
24.85 mi14:10:583:19:448:027:05
8:17
+0:12
25.2M
25.20 mi14:14:083:22:548:033:10
9:11
+0:54
Finish
26.22 mi14:22:303:31:168:048:22
8:13
-0:58

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

7:41 /mi

Average Pace

8:04 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:14

37% of race

Time at Steady Pace

1:49:08

52% of race

Time at Slower Pace

24:54

12% of race

Average Pace: 8:03 /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 mi11:15:2624:127:4724:12
7:47
#12242
10K
6.21 mi11:39:1848:047:4423:52
7:41
#12144
15K
9.32 mi12:03:101:11:567:4323:52
7:41
#11934
20K
12.43 mi12:27:291:36:157:4524:19
7:50
#11914
Half
13.11 mi12:32:471:41:337:455:18
7:46
#11953
25K
15.53 mi12:52:042:00:507:4719:17
7:57
#11988
30K
18.64 mi13:17:442:26:307:5225:40
8:16
#12111
20M
20.00 mi13:30:142:39:007:5712:30
9:12
#12622
21M
21.00 mi13:39:282:48:148:019:14
9:14
#12734
35K
21.75 mi13:45:292:54:158:016:01
8:03
#12714
23M
23.00 mi13:55:483:04:348:0110:19
8:14
#12625
24M
24.00 mi14:03:533:12:398:028:05
8:05
#12585
40K
24.85 mi14:10:583:19:448:027:05
8:17
#12567
25.2M
25.20 mi14:14:083:22:548:033:10
9:11
#12582
Finish
26.22 mi14:22:303:31:168:048:22
8:13
#12619
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi122429223922311688(Top 44%)8947(Top 59%)8947(Top 629%)
10K6.21 mi3.10 mi12144+989186+379186+3712060(Top 45%)9139(Top 60%)9139(Top 643%)
15K9.32 mi3.11 mi11934+2109064+1229064+12211688(Top 44%)8947(Top 59%)8947(Top 629%)
20K12.43 mi3.11 mi11914+209032+329032+3211953(Top 45%)8996(Top 59%)8996(Top 633%)
Half13.11 mi0.68 mi11953-399048-169048-1612398(Top 47%)9234(Top 61%)9234(Top 649%)
25K15.53 mi2.42 mi11988-359040+89040+812323(Top 46%)9042(Top 60%)9042(Top 636%)
30K18.64 mi3.11 mi12111-1239058-189058-1812757(Top 48%)9130(Top 60%)9130(Top 642%)
20M20.00 mi1.36 mi12622-5119257-1999257-19917513(Top 66%)11027(Top 73%)11027(Top 775%)
21M21.00 mi1.00 mi12734-1129285-289285-2814622(Top 55%)9766(Top 64%)9766(Top 687%)
35K21.75 mi0.75 mi12714+209261+249261+2412399(Top 47%)8733(Top 58%)8733(Top 614%)
23M23.00 mi1.25 mi12625+899205+569205+5611459(Top 43%)8206(Top 54%)8206(Top 577%)
24M24.00 mi1.00 mi12585+409167+389167+3811808(Top 44%)8308(Top 55%)8308(Top 584%)
40K24.85 mi0.85 mi12567+189139+289139+2811895(Top 45%)8274(Top 55%)8274(Top 582%)
25.2M25.20 mi0.35 mi12582-159138+19138+113484(Top 51%)8977(Top 59%)8977(Top 631%)
Finish26.22 mi1.02 mi12619-379130+89130+813473(Top 51%)9005(Top 59%)9005(Top 633%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21story building
+97ft-345ft

Overall

11688

Males

8947

M55-59

8947

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12060

Males

9139

M55-59

9139

10K→15K

6.2 - 9.3 mi

Top 44%
×3story building
+67ft-78ft

Overall

11688

Males

8947

M55-59

8947

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

11953

Males

8996

M55-59

8996

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

12398

Males

9234

M55-59

9234

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

12323

Males

9042

M55-59

9042

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12757

Males

9130

M55-59

9130

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

17513

Males

11027

M55-59

11027

20M→21M

20.0 - 21.0 mi

Top 55%
×8story building
+106ft-24ft

Overall

14622

Males

9766

M55-59

9766

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12399

Males

8733

M55-59

8733

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11459

Males

8206

M55-59

8206

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

11808

Males

8308

M55-59

8308

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11895

Males

8274

M55-59

8274

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13484

Males

8977

M55-59

8977

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

13473

Males

9005

M55-59

9005

Passing Analysis

Category:
Athletes Passed
1629
Passed By
2006
Net Change
-377
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12242
5K → 10K358260+98#12242#12144
10K → 15K312102+210#12144#11934
15K → 20K176156+20#11934#11914
20K → Half1150-39#11914#11953
Half → 25K116151-35#11953#11988
25K → 30K157280-123#11988#12111
30K → 20M23534-511#12111#12622
20M → 21M60172-112#12622#12734
21M → 35K5838+20#12734#12714
35K → 23M12435+89#12714#12625
23M → 24M9555+40#12625#12585
24M → 40K5840+18#12585#12567
40K → 25.2M2338-15#12567#12582
25.2M → Finish5895-37#12582#12619
TOTALS16292006-377
📊

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