Boston Marathon logo
BOSTON MARATHON 2023

Austin Smith

Bib: 4499•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 24%
Gender (Male)
#0 / 15176
Top 37%
Masters (Masters Men)
#0 / 9891
Top 23%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:41
Rank: #6133
Start → 5K
6:59/mi
21:41 split
10K· 6.21 mi
43:13
Rank: #6234 (-101)
5K → 10K
6:56/mi
21:32 split
15K· 9.32 mi
1:04:34
Rank: #6049 (+185)
10K → 15K
6:52/mi
21:21 split
20K· 12.43 mi
1:26:06
Rank: #5899 (+150)
15K → 20K
6:56/mi
21:32 split
Half· 13.11 mi
1:30:43
Rank: #5846 (+53)
20K → Half
6:46/mi
4:37 split
25K· 15.53 mi
1:47:47
Rank: #5833 (+13)
Half → 25K
7:02/mi
17:04 split
30K· 18.64 mi
2:10:30
Rank: #5819 (+14)
25K → 30K
7:19/mi
22:43 split
20M
2:20:32
Rank: #5813 (+6)
30K → 20M
7:23/mi
10:02 split
21M
2:28:36
Rank: #5859 (-46)
20M → 21M
8:04/mi
8:04 split
35K· 21.75 mi
2:34:12
Rank: #5898 (-39)
21M → 35K
7:29/mi
5:36 split
23M
2:44:05
Rank: #6012 (-114)
35K → 23M
7:54/mi
9:53 split
24M
2:51:49
Rank: #6080 (-68)
23M → 24M
7:44/mi
7:44 split
40K· 24.85 mi
2:58:40
Rank: #6159 (-79)
24M → 40K
8:01/mi
6:51 split
25.2M
3:01:36
Rank: #6196 (-37)
40K → 25.2M
8:30/mi
2:56 split
Finish· 26.22 mi
3:09:32
Rank: #6311 (-115)
25.2M → Finish
7:47/mi
7:56 split

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
Time1:30:43
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:38:49
Pace7:32 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3121:416:5921:41
6:59
-
10K
6.21 mi10:45:0343:136:5721:32
6:56
-0:03
15K
9.32 mi11:06:241:04:346:5621:21
6:52
-0:04
20K
12.43 mi11:27:561:26:066:5621:32
6:56
+0:04
Half
13.11 mi11:32:331:30:436:554:37
6:46
-0:10
25K
15.53 mi11:49:371:47:476:5617:04
7:02
+0:16
30K
18.64 mi12:12:202:10:307:0022:43
7:19
+0:17
20M
20.00 mi12:22:222:20:327:0210:02
7:23
+0:04
21M
21.00 mi12:30:262:28:367:058:04
8:04
+0:41
35K
21.75 mi12:36:022:34:127:055:36
7:29
-0:35
23M
23.00 mi12:45:552:44:057:089:53
7:54
+0:25
24M
24.00 mi12:53:392:51:497:107:44
7:44
-0:10
40K
24.85 mi13:00:302:58:407:116:51
8:01
+0:17
25.2M
25.20 mi13:03:263:01:367:122:56
8:30
+0:29
Finish
26.22 mi13:11:223:09:327:147:56
7:47
-0:43

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

6:46 /mi

Average Pace

7:14 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:47

57% of race

Time at Steady Pace

38:21

20% of race

Time at Slower Pace

43:24

23% of race

Average Pace: 7:14 /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 mi10:23:3121:416:5921:41
6:59
#6133
10K
6.21 mi10:45:0343:136:5721:32
6:56
#6234
15K
9.32 mi11:06:241:04:346:5621:21
6:52
#6049
20K
12.43 mi11:27:561:26:066:5621:32
6:56
#5899
Half
13.11 mi11:32:331:30:436:554:37
6:46
#5846
25K
15.53 mi11:49:371:47:476:5617:04
7:02
#5833
30K
18.64 mi12:12:202:10:307:0022:43
7:19
#5819
20M
20.00 mi12:22:222:20:327:0210:02
7:23
#5813
21M
21.00 mi12:30:262:28:367:058:04
8:04
#5859
35K
21.75 mi12:36:022:34:127:055:36
7:29
#5898
23M
23.00 mi12:45:552:44:057:089:53
7:54
#6012
24M
24.00 mi12:53:392:51:497:107:44
7:44
#6080
40K
24.85 mi13:00:302:58:407:116:51
8:01
#6159
25.2M
25.20 mi13:03:263:01:367:122:56
8:30
#6196
Finish
26.22 mi13:11:223:09:327:147:56
7:47
#6311
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6133560256025757(Top 22%)5275(Top 35%)5275(Top 235%)
10K6.21 mi3.10 mi6234-1015666-645666-646350(Top 24%)5740(Top 38%)5740(Top 256%)
15K9.32 mi3.11 mi6049+1855520+1465520+1465757(Top 22%)5275(Top 35%)5275(Top 235%)
20K12.43 mi3.11 mi5899+1505396+1245396+1245557(Top 21%)5112(Top 34%)5112(Top 228%)
Half13.11 mi0.68 mi5846+535358+385358+385039(Top 19%)4671(Top 31%)4671(Top 208%)
25K15.53 mi2.42 mi5833+135350+85350+85795(Top 22%)5297(Top 35%)5297(Top 236%)
30K18.64 mi3.11 mi5819+145326+245326+246088(Top 23%)5429(Top 36%)5429(Top 242%)
20M20.00 mi1.36 mi5813+65311+155311+156089(Top 23%)5362(Top 35%)5362(Top 239%)
21M21.00 mi1.00 mi5859-465332-215332-217747(Top 29%)6330(Top 42%)6330(Top 282%)
35K21.75 mi0.75 mi5898-395357-255357-258377(Top 31%)6708(Top 44%)6708(Top 299%)
23M23.00 mi1.25 mi6012-1145427-705427-708999(Top 34%)6953(Top 46%)6953(Top 310%)
24M24.00 mi1.00 mi6080-685470-435470-439259(Top 35%)7011(Top 46%)7011(Top 313%)
40K24.85 mi0.85 mi6159-795520-505520-5010080(Top 38%)7361(Top 49%)7361(Top 328%)
25.2M25.20 mi0.35 mi6196-375543-235543-239441(Top 35%)6967(Top 46%)6967(Top 311%)
Finish26.22 mi1.02 mi6311-1155621-785621-7810521(Top 40%)7545(Top 50%)7545(Top 337%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

5757

Males

5275

M40-44

5275

5K→10K

3.1 - 6.2 mi

Top 24%
×5story building
+79ft-138ft

Overall

6350

Males

5740

M40-44

5740

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

5757

Males

5275

M40-44

5275

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5557

Males

5112

M40-44

5112

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

5039

Males

4671

M40-44

4671

Half→25K

13.1 - 15.5 mi

Top 22%
×4story building
+66ft-88ft

Overall

5795

Males

5297

M40-44

5297

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6088

Males

5429

M40-44

5429

30K→20M

18.6 - 20.0 mi

Top 23%
×5story building
+64ft-50ft

Overall

6089

Males

5362

M40-44

5362

20M→21M

20.0 - 21.0 mi

Top 29%
×8story building
+106ft-24ft

Overall

7747

Males

6330

M40-44

6330

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8377

Males

6708

M40-44

6708

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

8999

Males

6953

M40-44

6953

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9259

Males

7011

M40-44

7011

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10080

Males

7361

M40-44

7361

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9441

Males

6967

M40-44

6967

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

10521

Males

7545

M40-44

7545

Passing Analysis

Category:
Athletes Passed
1086
Passed By
1264
Net Change
-178
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6133
5K → 10K143244-101#6133#6234
10K → 15K22237+185#6234#6049
15K → 20K18737+150#6049#5899
20K → Half585+53#5899#5846
Half → 25K8774+13#5846#5833
25K → 30K126112+14#5833#5819
30K → 20M6660+6#5819#5813
20M → 21M4288-46#5813#5859
21M → 35K2160-39#5859#5898
35K → 23M35149-114#5898#6012
23M → 24M36104-68#6012#6080
24M → 40K26105-79#6080#6159
40K → 25.2M1249-37#6159#6196
25.2M → Finish25140-115#6196#6311
TOTALS10861264-178
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing