Boston Marathon logo
BOSTON MARATHON 2023

Alvin Tan

Bib: 30142•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
9:59/mi
31:02
↑ 97↓ 3451.5%
10K· 6.21 mi
9:39/mi
1:01:02
↑ 79↓ 1380.4%
15K· 9.32 mi
9:07/mi
1:29:20
↑ 67↓ 78
20K· 12.43 mi
9:51/mi
1:59:56
↑ 106↓ 860.1%
Half· 13.11 mi
9:42/mi
2:06:33
↑ 19↓ 370.5%
25K· 15.53 mi
10:18/mi
2:31:31
↑ 66↓ 880.2%
30K· 18.64 mi
10:28/mi
3:04:01
↑ 181↓ 1480.2%
20M
10:35/mi
3:18:24
↑ 64↓ 500.2%
21M
12:19/mi
3:30:43
↑ 106↓ 241.6%
35K· 21.75 mi
10:12/mi
3:38:21
↑ 17↓ 861.7%
23M
10:05/mi
3:50:59
↑ 23↓ 630.6%
24M
9:34/mi
4:00:33
↓ 821.3%
40K· 24.85 mi
9:46/mi
4:08:54
↓ 200.3%
25.2M
10:06/mi
4:12:23
↑ 13↓ 160.2%
Finish· 26.22 mi
9:49/mi
4:22:23
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:33
Pace9:39 /mi
2nd Half
Distance13.11 mi
Time2:15:50
Pace10:22 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4331:029:5931:02
9:59
-
10K
6.21 mi12:19:431:01:029:4930:00
9:39
-0:20
15K
9.32 mi12:48:011:29:209:3528:18
9:07
-0:32
20K
12.43 mi13:18:371:59:569:3930:36
9:51
+0:44
Half
13.11 mi13:25:142:06:339:396:37
9:42
-0:09
25K
15.53 mi13:50:122:31:319:4524:58
10:18
+0:36
30K
18.64 mi14:22:423:04:019:5232:30
10:28
+0:10
20M
20.00 mi14:37:053:18:249:5514:23
10:35
+0:07
21M
21.00 mi14:49:243:30:4310:0212:19
12:19
+1:44
35K
21.75 mi14:57:023:38:2110:027:38
10:12
-2:07
23M
23.00 mi15:09:403:50:5910:0312:38
10:05
-0:07
24M
24.00 mi15:19:144:00:3310:019:34
9:34
-0:31
40K
24.85 mi15:27:354:08:5410:018:21
9:46
+0:12
25.2M
25.20 mi15:31:044:12:2310:013:29
10:06
+0:20
Finish
26.22 mi15:41:044:22:2310:0110:00
9:49
-0:17

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

9:07 /mi

Average Pace

10:01 /mi

Slowest Pace

12:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

37:52

14% of race

Time at Steady Pace

2:45:19

63% of race

Time at Slower Pace

59:12

23% of race

Average Pace: 10:00 /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 mi11:49:4331:029:5931:02
9:59
#23400
10K
6.21 mi12:19:431:01:029:4930:00
9:39
#23212
15K
9.32 mi12:48:011:29:209:3528:18
9:07
#22544
20K
12.43 mi13:18:371:59:569:3930:36
9:51
#22554
Half
13.11 mi13:25:142:06:339:396:37
9:42
#22555
25K
15.53 mi13:50:122:31:319:4524:58
10:18
#22585
30K
18.64 mi14:22:423:04:019:5232:30
10:28
#22496
20M
20.00 mi14:37:053:18:249:5514:23
10:35
#22447
21M
21.00 mi14:49:243:30:4310:0212:19
12:19
#22506
35K
21.75 mi14:57:023:38:2110:027:38
10:12
#22469
23M
23.00 mi15:09:403:50:5910:0312:38
10:05
#22345
24M
24.00 mi15:19:144:00:3310:019:34
9:34
#22243
40K
24.85 mi15:27:354:08:5410:018:21
9:46
#22140
25.2M
25.20 mi15:31:044:12:2310:013:29
10:06
#22081
Finish
26.22 mi15:41:044:22:2310:0110:00
9:49
#22053
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi23400137751377520972(Top 79%)12735(Top 84%)12735(Top 621%)
10K6.21 mi3.10 mi23212+18813711+6413711+6422937(Top 86%)13611(Top 90%)13611(Top 663%)
15K9.32 mi3.11 mi22544+66813409+30213409+30220972(Top 79%)12735(Top 84%)12735(Top 621%)
20K12.43 mi3.11 mi22554-1013417-813417-822518(Top 85%)13406(Top 88%)13406(Top 653%)
Half13.11 mi0.68 mi22555-113412+513412+522622(Top 85%)13449(Top 89%)13449(Top 655%)
25K15.53 mi2.42 mi22585-3013416-413416-422827(Top 86%)13517(Top 89%)13517(Top 659%)
30K18.64 mi3.11 mi22496+8913352+6413352+6422127(Top 83%)13136(Top 87%)13136(Top 640%)
20M20.00 mi1.36 mi22447+4913322+3013322+3021925(Top 82%)12966(Top 85%)12966(Top 632%)
21M21.00 mi1.00 mi22506-5913339-1713339-1723216(Top 87%)13530(Top 89%)13530(Top 659%)
35K21.75 mi0.75 mi22469+3713318+2113318+2121777(Top 82%)12834(Top 85%)12834(Top 625%)
23M23.00 mi1.25 mi22345+12413259+5913259+5920242(Top 76%)12121(Top 80%)12121(Top 591%)
24M24.00 mi1.00 mi22243+10213208+5113208+5119444(Top 73%)11739(Top 77%)11739(Top 572%)
40K24.85 mi0.85 mi22140+10313155+5313155+5319272(Top 72%)11618(Top 77%)11618(Top 566%)
25.2M25.20 mi0.35 mi22081+5913121+3413121+3417764(Top 67%)10923(Top 72%)10923(Top 532%)
Finish26.22 mi1.02 mi22053+2813101+2013101+2021193(Top 80%)12516(Top 82%)12516(Top 610%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

20972

Males

12735

M50-54

12735

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

22937

Males

13611

M50-54

13611

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

20972

Males

12735

M50-54

12735

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

22518

Males

13406

M50-54

13406

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22622

Males

13449

M50-54

13449

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22827

Males

13517

M50-54

13517

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

22127

Males

13136

M50-54

13136

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

21925

Males

12966

M50-54

12966

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23216

Males

13530

M50-54

13530

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

21777

Males

12834

M50-54

12834

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20242

Males

12121

M50-54

12121

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

19444

Males

11739

M50-54

11739

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

19272

Males

11618

M50-54

11618

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

17764

Males

10923

M50-54

10923

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

21193

Males

12516

M50-54

12516

Passing Analysis

Category:
Athletes Passed
2021
Passed By
674
Net Change
+1347
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23400
5K → 10K322134+188#23400#23212
10K → 15K6735+668#23212#22544
15K → 20K133143-10#22544#22554
20K → Half2627-1#22554#22555
Half → 25K85115-30#22555#22585
25K → 30K16273+89#22585#22496
30K → 20M7728+49#22496#22447
20M → 21M3695-59#22447#22506
21M → 35K5215+37#22506#22469
35K → 23M13612+124#22469#22345
23M → 24M1042+102#22345#22243
24M → 40K1085+103#22243#22140
40K → 25.2M590+59#22140#22081
25.2M → Finish4820+28#22081#22053
TOTALS2021674+1347
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing