Boston Marathon logo
BOSTON MARATHON 2023

Fernando Guzman

Bib: 8291•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 (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:22
Rank: #12776
Start → 5K
24:22 | 7:51/mi
10K· 6.21 mi
49:43
Rank: #14392 (-1616)
5K → 10K
25:21 | 8:10/mi
15K· 9.32 mi
1:14:27
Rank: #14269 (+123)
10K → 15K
24:44 | 7:58/mi
20K· 12.43 mi
1:40:13
Rank: #14590 (-321)
15K → 20K
25:46 | 8:18/mi
Half· 13.11 mi
1:45:51
Rank: #14683 (-93)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:06:36
Rank: #14985 (-302)
Half → 25K
20:45 | 8:33/mi
30K· 18.64 mi
2:34:36
Rank: #15426 (-441)
25K → 30K
28:00 | 9:01/mi
20M
2:47:16
Rank: #15633 (-207)
30K → 20M
12:40 | 9:19/mi
21M
2:57:27
Rank: #15862 (-229)
20M → 21M
10:11 | 10:11/mi
35K· 21.75 mi
3:04:19
Rank: #15975 (-113)
21M → 35K
6:52 | 9:11/mi
23M
3:15:37
Rank: #15986 (-11)
35K → 23M
11:18 | 9:02/mi
24M
3:24:07
Rank: #15902 (+84)
23M → 24M
8:30 | 8:30/mi
40K· 24.85 mi
3:31:03
Rank: #15712 (+190)
24M → 40K
6:56 | 8:07/mi
25.2M
3:34:03
Rank: #15634 (+78)
40K → 25.2M
3:00 | 8:42/mi
Finish· 26.22 mi
3:42:05
Rank: #15463 (+171)
25.2M → Finish
8:02 | 7:53/mi

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
Time1:45:51
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:56:14
Pace8:52 /mi
📊Positive Split: 9.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2224:227:5124:22
7:51
-
10K
6.21 mi11:17:4349:438:0025:21
8:10
+0:19
15K
9.32 mi11:42:271:14:277:5924:44
7:58
-0:12
20K
12.43 mi12:08:131:40:138:0425:46
8:18
+0:20
Half
13.11 mi12:13:511:45:518:045:38
8:15
-0:03
25K
15.53 mi12:34:362:06:368:0920:45
8:33
+0:18
30K
18.64 mi13:02:362:34:368:1828:00
9:01
+0:28
20M
20.00 mi13:15:162:47:168:2212:40
9:19
+0:18
21M
21.00 mi13:25:272:57:278:2710:11
10:11
+0:52
35K
21.75 mi13:32:193:04:198:296:52
9:11
-1:00
23M
23.00 mi13:43:373:15:378:3011:18
9:02
-0:09
24M
24.00 mi13:52:073:24:078:308:30
8:30
-0:32
40K
24.85 mi13:59:033:31:038:296:56
8:07
-0:23
25.2M
25.20 mi14:02:033:34:038:303:00
8:42
+0:35
Finish
26.22 mi14:10:053:42:058:298:02
7:53
-0:49

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

7:51 /mi

Average Pace

8:29 /mi

Slowest Pace

10:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:25

40% of race

Time at Steady Pace

1:03:39

29% of race

Time at Slower Pace

1:09:01

31% of race

Average Pace: 8:28 /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 mi10:52:2224:227:5124:22
7:51
#12776
10K
6.21 mi11:17:4349:438:0025:21
8:10
#14392
15K
9.32 mi11:42:271:14:277:5924:44
7:58
#14269
20K
12.43 mi12:08:131:40:138:0425:46
8:18
#14590
Half
13.11 mi12:13:511:45:518:045:38
8:15
#14683
25K
15.53 mi12:34:362:06:368:0920:45
8:33
#14985
30K
18.64 mi13:02:362:34:368:1828:00
9:01
#15426
20M
20.00 mi13:15:162:47:168:2212:40
9:19
#15633
21M
21.00 mi13:25:272:57:278:2710:11
10:11
#15862
35K
21.75 mi13:32:193:04:198:296:52
9:11
#15975
23M
23.00 mi13:43:373:15:378:3011:18
9:02
#15986
24M
24.00 mi13:52:073:24:078:308:30
8:30
#15902
40K
24.85 mi13:59:033:31:038:296:56
8:07
#15712
25.2M
25.20 mi14:02:033:34:038:303:00
8:42
#15634
Finish
26.22 mi14:10:053:42:058:298:02
7:53
#15463
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi127769448944814068(Top 53%)9929(Top 65%)9929(Top 441%)
10K6.21 mi3.10 mi14392-161610094-64610094-64615968(Top 60%)10688(Top 70%)10688(Top 475%)
15K9.32 mi3.11 mi14269+12310032+6210032+6214068(Top 53%)9929(Top 65%)9929(Top 441%)
20K12.43 mi3.11 mi14590-32110147-11510147-11515566(Top 58%)10474(Top 69%)10474(Top 465%)
Half13.11 mi0.68 mi14683-9310183-3610183-3616146(Top 61%)10731(Top 71%)10731(Top 477%)
25K15.53 mi2.42 mi14985-30210262-7910262-7916527(Top 62%)10766(Top 71%)10766(Top 478%)
30K18.64 mi3.11 mi15426-44110375-11310375-11317225(Top 65%)11000(Top 72%)11000(Top 488%)
20M20.00 mi1.36 mi15633-20710440-6510440-6518095(Top 68%)11278(Top 74%)11278(Top 501%)
21M21.00 mi1.00 mi15862-22910510-7010510-7018635(Top 70%)11481(Top 76%)11481(Top 510%)
35K21.75 mi0.75 mi15975-11310535-2510535-2518622(Top 70%)11415(Top 75%)11415(Top 507%)
23M23.00 mi1.25 mi15986-1110517+1810517+1816165(Top 61%)10312(Top 68%)10312(Top 458%)
24M24.00 mi1.00 mi15902+8410465+5210465+5214457(Top 54%)9510(Top 63%)9510(Top 422%)
40K24.85 mi0.85 mi15712+19010381+8410381+8410761(Top 40%)7737(Top 51%)7737(Top 344%)
25.2M25.20 mi0.35 mi15634+7810343+3810343+3810751(Top 40%)7708(Top 51%)7708(Top 342%)
Finish26.22 mi1.02 mi15463+17110258+8510258+8511284(Top 42%)7941(Top 52%)7941(Top 353%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21stories
+97ft-345ft

Overall

14068

Males

9929

M45-49

9929

5K→10K

3.1 - 6.2 mi

Top 60%
×5stories
+79ft-138ft

Overall

15968

Males

10688

M45-49

10688

10K→15K

6.2 - 9.3 mi

Top 53%
×3stories
+67ft-78ft

Overall

14068

Males

9929

M45-49

9929

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

15566

Males

10474

M45-49

10474

20K→Half

12.4 - 13.1 mi

Top 61%
×2stories
+19ft-37ft

Overall

16146

Males

10731

M45-49

10731

Half→25K

13.1 - 15.5 mi

Top 62%
×4stories
+66ft-88ft

Overall

16527

Males

10766

M45-49

10766

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

17225

Males

11000

M45-49

11000

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

18095

Males

11278

M45-49

11278

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

18635

Males

11481

M45-49

11481

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

18622

Males

11415

M45-49

11415

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

16165

Males

10312

M45-49

10312

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

14457

Males

9510

M45-49

9510

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10761

Males

7737

M45-49

7737

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10751

Males

7708

M45-49

7708

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11284

Males

7941

M45-49

7941

Passing Analysis

Category:
Athletes Passed
1253
Passed By
3940
Net Change
-2687
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12776
5K → 10K191635-1616#12776#14392
10K → 15K247124+123#14392#14269
15K → 20K103424-321#14269#14590
20K → Half598-93#14590#14683
Half → 25K73375-302#14683#14985
25K → 30K71512-441#14985#15426
30K → 20M32239-207#15426#15633
20M → 21M28257-229#15633#15862
21M → 35K32145-113#15862#15975
35K → 23M7889-11#15975#15986
23M → 24M11228+84#15986#15902
24M → 40K1944+190#15902#15712
40K → 25.2M791+78#15712#15634
25.2M → Finish1809+171#15634#15463
TOTALS12533940-2687
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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